Meet Our Medical Team

RiverStone Health’s dedicated team of healthcare professionals are passionate about our community and truly care about every patient’s wellbeing.

Austin Barnhardt

M.D.

Medical interests: Rural healthcare, prevention, wilderness medicine, emergency medicine, veteran health, American Indian & Alaskan Native health.

Language: English

Joined Staff: 2025

Schooling:

M.D., Virginia Commonwealth University School of Medicine, Richmond, VA
Montana State University, Bozeman

Outside interests: Recreating outside including hiking, kayaking, climbing and skiing; playing soccer; acoustic guitar; spending quality time with my wife Nora; connecting with family and friends at our cabin in Red Lodge.

Chris Baumert

M.D. – Medical Director

Medical interests: Health policy and health system improvement, prenatal care and ultrasound, women’s health, dermatology, sports medicine and musculoskeletal care.

Language: English

Joined Staff: 2011

Schooling:

M.D., Temple University School of Medicine, Philadelphia, PA
B.S., Virginia Tech, Blacksburg, VA

Board certification: American Board of Family Medicine

Outside interests: Hiking, biking, running, skiing, yoga, and spending time with friends and family

Garth Brand

M.D.

Medical interests: Full Spectrum, hospital, and addiction medicine. Clinical reasoning.

Language: English

Joined Staff: 2012

Schooling:

M.D., Ross University, Portsmouth, Dominica
Undergraduate degree, biochemistry biophysics and microbiology, Whitman College, Walla Walla, WA

Board certification: American Board of Family Medicine

Outside interests: Barbecue and cooking, hiking, biking, skiing, travel and podcasts.

S. Caleb Chang

M.D.

Medical interests: Family medicine, pathology, genetics
Language: English, Mandarin

Joined Staff: 2025
Schooling:

Saint James School of Medicine, Anguilla
University of Connecticut, Mansfield, Conn.

Outside Interests: Hiking, chess

Miranda Chen

M.D.

Medical interests: Rural medicine, preventative care, advance care planning, music as medicine
Language: English

Joined Staff: 2024
Schooling:

Geisinger Commonwealth School of Medicine
Penn State University

Outside Interests: Playing violin, hiking, painting and crafting

Bradley Cox

D.O.

Medical interests: Primary care, pediatrics/adolescents, geriatric care, behavioral health, nutrition, integrative medicine, sports medicine, osteopathic manipulation treatment.

Language: English

Joined Staff: 2024

Schooling:

Touro University – California
Undergraduate: University of Wisconsin – Milwaukee

Outside interests: Brazilian jiu jitsu, hiking, camping, skiing, video games

Colton Crowther

D.O.

Medical interests: Rural, wilderness and sports medicine.

Language: English

Joined Staff: 2023

Schooling:

Touro University Nevada College of Osteopathic Medicine.
Undergraduate: Brigham Young University, Provo, Utah.

Outside interests: Denver Broncos, backpacking, archery, hunting, fishing, mountain biking, snowmobiling, skiing and pickleball.

Abby Dalton

P.A.-C

Medical interests: Family medicine, women’s health, dermatology, pediatrics.

Language: English

Joined Staff: 2016

Schooling:

Masters of Clinical Health Services, University of Washington MedEx NW, Seattle, WA
B.A. in Health Sciences, Carroll College, Helena, MT

Outside interests: I love all plants, gardening and landscaping. I also enjoy cooking, golfing, hiking/backpacking, traveling, and, of course, spending time with family, friends, my husband Craig, and our dog Charlie.

James Denisar-Green

M.D., PhD

Medical interests: Rural medicine, preventive medicine, maternity and obstetrical care, healthcare policy, healthcare technology.

Language: English

Joined Staff: 2021

Board certification: American Board of Family Medicine

Schooling:

M.D., Ph.D, University of North Carolina at Chapel Hill
Medical residency, University of Nevada Las Vegas School of Medicine, Las Vegas and Winnemucca, NV
B.S., genetics and biodiversity; master’s degree, biotechnology, Washington State University, Pullman, WA

Outside interests: Travel, reading suspense and fiction, listening to NPR, documentary consumption and computer gaming.

Aleah Dorman

DMS, P.A.-C

Medical interests: Comprehensive family medicine and primary care, women’s health, mental health and wellness, community health and enrichment, lifestyle medicine.

Language: English

Joined Staff: 2024

Schooling:

Doctor of Medical Science, Butler University, Indianapolis, IN
Master of Physician Assistant Studies, Rocky Mountain College, Billings, MT
B.A. in Biology with an emphasis in Health Sciences, Montana State University Billings, Billings, MT

Outside interests: Spending time with family and friends, making and enjoying tasty food, trying new workouts, home improvement projects, podcasts, dogs, anything outdoors, and live music.

Maddie du Pont

D.O.

Medical interests: Rural family medicine, wilderness medicine, OMT, lifestyle medicine
Language: English

Joined Staff: 2024
Schooling:

- Philadelphia College of Osteopathic Medicine
- University of Delaware

Outside Interests: Yoga, running, hiking, skiing, spending time with family and my 2 dogs, cooking, playing backgammon, needlepoint

Benjamin Gallaher

M.D.

Medical interests: Primary care, lifestyle medicine, preventative medicine, wilderness medicine.

Language: English

Joined Staff: 2025

Schooling:

M.D., Southern Illinois University School of Medicine, Springfield, Ill.
B.S., Biology, Southern Illinois University – Edwardsville, Ill.

Outside interests: Spending time with my wife and two dogs, camping, fishing, golfing, hiking, and playing piano and saxophone.

Paolo Gerbasi

M.D.

Medical interests: Pediatrics and obstetrics; sports medicine; preventive medicine.

Language: English, Spanish

Joined Staff: 2014, full time 2021

Board certification: American Board of Family Medicine

Schooling:

M.D., University of Washington School of Medicine, Seattle, WA
Medical residency, Montana Family Medicine Residency, Billings, MT
Undergraduate degree, Montana State University, Bozeman, MT

Outside interests: Spending time with my wife, Nancy, and visiting our kids and grandkids in five different states. Train year round to compete in triathlons; fly fish year-round; backpacking trips and camping; brewing beer at home and commercially.

Amy Gustafson

D.M.D.

Medical interests: General dentistry, community health.

NYU-Langone AEGD Faculty

Language: English

Joined Staff: 2011

Schooling:

D.D.S, Oregon Health Sciences University School of Dentistry, Portland
Undergraduate degree, University of Puget Sound, Tacoma, Wash.

Outside interests: Hiking, playing with her dog, spending time outdoors and reading.

Zach Harder

D.O.

Medical interests: Addiction medicine, sports medicine, preventative medicine
Language: English

Joined Staff: 2024
Schooling:

Idaho College of Osteopathic Medicine
University of Idaho

Outside Interests: Snowboarding, skateboarding, guitar, and hanging with my goldendoodle Piper.

Erin Hixson

M.D.

Medical Director of Informatics

Medical interests: Primary Care, Women’s Health, Preventative Medicine, Medical Informatics

Language: English

Joined Staff: 2021

Board certification: American Board of Family Medicine

Schooling:

M.D., University of Washington School of Medicine, Seattle, WA.
Montana Family Medicine Residency, Billings, MT
B.S. in Physiology, Seattle Pacific University, Seattle, WA

Outside interests: Spending time with family and friends exploring new places and cultures through travel, road trips, hiking, and dining.

William Hong

M.D.

Medical interests: Full-spectrum family medicine and care of underserved communities, including obstetrics, pediatrics, geriatrics.

Language: English, Korean

Joined Staff: 2023

Schooling:

University of Queensland School of Medicine, Australia.
Undergraduate: Johns Hopkins University, Baltimore, MD.

Outside interests: Exploring the outdoors, spending time with friends and family, watching sports, (especially San Francisco 49ers), reading, video games, board games and cooking Korean food.

Courtney Honken

M.D.

Medical interests: Rural practice, preventive care, prenatal care, lifestyle medicine, chronic pain management.

Language: English

Joined Staff: 2023

Schooling:

University of Washington School of Medicine, Seattle.
Undergraduate: Montana State University in Bozeman.

Mackay Hull

D.D.S., M.S., M.D.

Medical interests: Oral-maxillofacial surgery

Language: English

Joined Staff: Retired from private practice, volunteer since 2017

Schooling:

University of Iowa School of Dentistry, Iowa City
University of Nebraska School of Medicine, Omaha

Outside interests: Collecting antiques and owner of Hull’s Antiques, spending time in the mountains.

Zach Hunter

P.A.-C

Medical interests: Preventive health management and pediatrics.

Language: English

Joined Staff: 2019

Schooling:

Master of Physician Assistant Studies, Rocky Mountain College, Billings, MT

Outside interests: Running, outdoor recreation, reading

Kaci Jansma

P.A.-C

Medical interests: Sports medicine and family practice.

Language: English

Joined Staff: 2015

Schooling:

Graduate degrees, PA-C and Master of Clinical Health Services, MedEx, University of Washington, Seattle
B.S., Health and Human Performance, Montana State University, Billings

Outside interests: With my husband, Seth, helping on the family’s cattle ranch in Richey, MT, and lending a hand to local ranching families. We also love to spending time with our nieces and nephew. Personal hobbies include participating in and instructing fitness groups and volleyball camps for middle school and high school girls.

Naomi Keehn

P.A.-C

Medical interests: Primary care, preventive medicine, women’s health and behavioral health.

Language: English

Joined Staff: 2021

Schooling:

Master of Physician Assistant Studies, Rocky Mountain College, Billings, MT
B.A., biology with minor in deaf studies, University of Minnesota, Morris

Outside interests: Hiking, camping, snowboarding, traveling, board games, crafting and dogs.

Katherine Ellis Keith

F.N.P.-C

Medical interests: Mental health for all ages, women’s health, pediatric behavioral health, preventative medicine, integrated medicine.

Language: English

Joined Staff: 2022

Board certification: American Academy of Nurse Practitioners

Schooling:

Master of Science in Nursing (MSN), Vanderbilt University, Nashville, TN
Public Heath Associate Program (PHAP) Fellowship, Centers for Disease Control (CDC), Atlanta, GA/Billings, MT
Bachelor of Science (BS), Furman University, Greenville, SC

Outside interests: Playing outside, hanging with my furry and feathered kids, finding live music.

Julie Kelso

M.D.

Medical interests: Collaborative care, de-prescribing, mood disorders

Language: English

Joined Staff: 2021

Board certification: American Board of Psychiatry and Neurology

Schooling:

M.D., University of Nebraska Medical Center, Omaha, NE
Public psychiatry fellow, Columbia University, New York, NY
Residencies, University of Colorado Health Sciences Center, Denver, CO, Psychiatry; Columbia University, New York, NY, public psychiatry fellowship
B.S., biology and Spanish, Rocky Mountain College, Billings, MT

Outside interests: Skiing, hiking, biking, reading and travel.

Dave Kidman

D.O.

Medical interests: Wilderness medicine, rural medicine and sports medicine
Language: English, Spanish

Joined Staff: 2024
Schooling:

University of the Incarnate Word School of Osteopathic Medicine
Bachelor’s degree in emergency services

Outside Interests: I love being outdoors, hiking, fishing, hunting and snowboarding.

Jacalynn Kim

D.O.

Medical interests: Women’s health, pediatrics, osteopathic intervention, nutrition.

Language: English

Joined Staff: 2023

Schooling:

Arizona College of Osteopathic Medicine of Midwestern, Glendale, AZ.
Undergraduate: University of California-San Diego.

Outside interests: Running, hiking, traveling, eating good food, and spending time with friends and family.

Jonathan Kim

D.O.

Medical interests: Rural medicine, geriatrics, addiction medicine.

Language: English

Joined Staff: 2023

Schooling:

Arizona College of Osteopathic Medicine of Midwestern, Glendale, AZ.
California State University of Long Beach.

Outside interests: Hiking, exploring, golfing and working out in the gym.

Staci Lee

M.D.

Medical interests: Care of people living with HIV and/or identifying as LGBTQ+, prevention & treatment of infectious diseases, developing & providing interprofessional medical education for patients, medical providers & the public.

Language: English

Joined Staff: 2021

Schooling:

M.D., Keck School of Medicine, University of Southern California, Los Angeles, CA
Medical residency, Mayo Clinic, Rochester, MN; Internal Medicine Residency, Infectious Diseases Fellowship
Master of education in Health Professions, Johns Hopkins University, Baltimore, MD
Undergraduate degree, Iowa State University, Ames, IA

Outside interests: Seeking out people, books, music, shows, and outdoor activities that allow me to see or experience life from a different perspective.

Megan Littlefield

M.D.

Chief Medical Officer

Medical interests: Pediatrics, access to care, obesity and diabetes management.

Language: English

Joined Staff: 2011

Board certification: American Board Internal Medicine; American Board of Pediatrics

Schooling:

M.D., University of Maryland School of Medicine, Baltimore, MD
Medical residency, University of Chicago, IL
Undergraduate degree, Connecticut College, New London, CT

Outside interests: Hiking, downhill skiing and spending time with family.

Matt Lopiano

M.D.

Medical interests: Obstetrics, emergency medicine and diagnostic imaging.

Language: English

Joined Staff: 2023

Schooling:

St. George’s University School of Medicine, Grenada;
Rutgers New Jersey Medical School, Newark, NJ, general surgery internship.
Undergraduate: University of Delaware, Newark, DE.

Outside interests: Skiing, hiking, fishing, shooting, cooking, dancing and spending time with the people I love.

Kelsey Mastel

D.M.D.

NYU-Langone AEGD Faculty

Language: English

Joined Staff: 2016

Schooling:

D.M.D, Arizona School of Dentistry and Oral Health, Mesa
B.S., Chemistry, Montana Tech of the University of Montana, Butte

Outside interests: Big fan of the outdoors, love hiking and “cabining” at my family’s cabin on Flathead Lake.

Stacy Maynard

D.O., PhD

Medical interests: Primary care, pediatrics, women’s health
Language: English

Joined Staff: 2024
Schooling:

Pacific Northwest University of Health Sciences
University of Wisconsin-Madison
University of Puget Sound

Outside Interests: Hiking, gardening, walking my dog

Regan Mazour

P.A.-C

Medical interests: Women’s health, dermatology, pediatrics, integrative medicine

Language: English

Joined Staff: 2025

Schooling:

Master of Physician Assistant Studies, University of Nebraska Medical Center, Omaha, NE
BS, University of Northern Iowa, Cedar Falls, IA

Outside interests: Spending time with family and friends, hiking, watching and playing volleyball, painting, traveling and trying new foods.

Ashley McClammy

F.N.P.-C

Medical interests: I am dedicated to changing how healthcare is delivered by acknowledging individuals’ lived experiences and partnering with patients to empower them in their health journey. My healthcare philosophy is rooted in addressing healthcare for all and providing trauma-informed and weight-neutral healthcare. While I love all aspects of family practice, women’s health is a particular passion of mine.

Language: English

Joined Staff: 2024

Schooling:

Master of Science in Nursing, Frontier Nursing University, Hyden, KY
BSN, Montana State University, Bozeman, MT
BA, University of Washington, Seattle, WA

Outside interests: I enjoy cooking, moving my body daily, investing in my mental health and getting to the mountains when possible. I am a member of the Billings Breastfeeding Coalition and love supporting and advocating for breastfeeding parents. I also love hanging out with my partner and two fantastic children.

Shane McCullough

P.A.-C

Medical interests: Primary care, sports medicine, orthopedics

Language: English

Joined Staff: 2020

Schooling:

Master of Physician Assistant Studies, Rocky Mountain College, Billings, MT
M.S., Athletic Training, Montana State University Billings, Billings, MT

Outside interests: Hiking, snowboarding, fly fishing, coaching my littles Brecklyn and Bennett. Spending time with my wife Jenny, preferably playing cards at a brewery.

Shawnell Miller

Registered Dental Hygienist

Medical interests: Public health and serving the community; treating and educating patients on periodontal disease.

Language: English

Joined Staff: 2019

Schooling:

Associates of Applied Science in Dental Hygiene, Sheridan College, Sheridan, Wyo.

Outside interests: Spending time with family and friends, and especially spending time outdoors and taking backpacking trips.

James Miller

P.A.-C

Medical interests: Family medicine, Pediatrics

Language: English

Joined Staff: 2017

Schooling:

Master of Physician Assistant Studies, Rocky Mountain College, Billings, MT
B.S., biology, Rocky Mountain College, Billings, MT

Outside interests: Hunting, fishing and boating

Kindra Munda

Registered Dental Hygienist

Medical interests: Oral health

Language: English

Joined Staff: 2023

Schooling:

Associate of Applied Science, Sheridan College, Sheridan, WY
Associate of Applied Science, Central Wyoming College, Riverton, WY

Outside interests: Spending time with my 2 children and our dog. Also racing cars and going to the movies.

Mary Nessan

Registered Dental Hygienist

Medical interests: Public health and treating and educating patients on the importance of oral health.

Language: English

Joined Staff: 2020

Schooling:

B.A., dental hygiene, Carroll College, Helena, MT

Outside interests: Camping, water skiing and snow skiing

DeAnna Niles

P.A.-C

Medical interests: Women’s health and diabetes.

Language: English

Joined Staff: 2012

Schooling:

Graduate degree, MedEx Northwest University of Washington, Seattle
Undergraduate degree, Carroll College, Helena, MT

Outside interests: Spending time with her family, camping and riding horses.

Sam Pollock

D.O.

Medical interests: Rural practice, pediatrics, geriatrics, addiction medicine, pain management and care of military veterans.

Language: English

Joined Staff: 2023

Schooling:

Rocky Vista University College of Osteopathic Medicine.
Undergraduate: Brigham Young University-Provo, Utah.

Outside interests: Fishing, hiking, VR and 3D printing.

Hersch Pokras

M.D.

Medical interests: Rural family practice and wilderness medicine.

Language: English

Joined Staff: 2023

Schooling:

Saba University School of Medicine, Dutch Caribbean.
Undergraduate: University of California, Santa Barbara.

Outside interests: Outdoor sports, including fly fishing and backpacking.

Crystal Richardson

M.D.

Medical interests: Global health

Language: English

Joined Staff: 2025

Schooling:

M.D., Saint James School of Medicine, Anguilla
University of Kent, Canterbury, England

Outside interests: Hiking, scuba diving, wheel throwing, hot yoga, cooking.

Julia Rambo

P.A.-C

Medical interests: Family medicine, dermatology and emergency medicine.

Language: English

Joined Staff: 2023

Schooling:

Rocky Mountain College, master of physician assistant studies, 2022.
Bachelor of health science, College of Idaho, Caldwell, ID.

Outside interests: Golf, cooking, eating great food, spending time with my husband and our dogs.

Grace Rose

D.O.

Medical interests: Diabetes management, public health, preventive medicine, pediatrics, nutrition, rural health, OMT and women’s health.

Language: English

Joined Staff: 2022

Schooling:

D.O., Pacific Northwest University of Health Sciences, School of Osteopathic Medicine, Yakima, WA
B.S., human nutrition, Southern Utah University, Cedar City

Outside interests: Running/exercise, hiking, cooking, baking.

Dani Ryan

D.O.

Medical interests: Preventative medicine, team-based decision making, obstetrics, newborn care and pediatric milestones.
Language: English

Joined Staff: 2024
Schooling:

A.T. Still University School of Osteopathic Medicine in Arizona
University of South Florida

Outside Interests: Cooking, baking, crocheting, coffee (I have every fancy coffee maker you could ever want), road trips, and amusement parks

Sarah Ryersee

D.O.

Medical interests: Rural outpatient, women’s health/ OB
Language: English

Joined Staff: 2024
Schooling:

Kansas City University College of Osteopathic Medicine
Missouri Southern State University

Outside Interests: Tennis, hiking, traveling, Netflix

Shae Saunders

M.D.

Medical interests: Adult and pediatric primary care, women’s health, preventative medicine.

Language: English

Joined Staff: 2022

Schooling:

M.D., American University of Antigua College of Medicine, Antigua and Barbuda
B.S., Cultural Healthcare, Metropolitan State University of Denver, Denver, CO

Outside interests: Cooking, Spending time with my daughter, looking up woodworking projects for my husband to do on Pinterest.

Eduardo Serrano

M.D.

Medical interests: Women’s health, mental health, chronic disease management
Language: English, Spanish

Joined Staff: 2024
Schooling:

Baylor College of Medicine
Texas A&M

Outside Interests: Cooking, camping, weightlifting, swimming

Gerrit Seymour

D.O.

Medical interests: Refugee health, international medicine, addiction medicine, behavioral health, OMT

Language: English, Turkish

Joined staff: 2025

Schooling:

D.O., Lake Erie College of Osteopathic Medicine, Greensburg, PA
B.S., Middle Eastern studies & music, University of Utah, Salt Lake City, Utah

Board certification: American Board of Family Medicine

Outside interests: I love spending time with my family in the outdoors. I enjoy playing and watching all sports, especially soccer and basketball. I can often be found playing or enjoying good music.

Serin Sheriff

M.D.

Medical interests: Women’s health, pediatrics, OB care/peripartum cardiomyopathy, rural medicine, preventive medicine

Language: English, Hindi, Tamil, Malayalam

Joined Staff: 2025

Schooling:

M.D., Odessa National Medical University, Ukraine

Outside Interests: Biking, badminton, cooking, and spending quality time with family, especially while watching our favorite Netflix shows together.

Eduardo Simo-Miranda

D.M.D.

Medical interests: Dental and overall health
Language: English, Spanish

Joined Staff: 2025
Schooling:

Case Western Reserve University School of Dental Medicine
University of South Florida-Sarasota-Manatee Campus

Outside Interests: Family/dogs, pickleball and outdoor activities.

Dorothy Sizemore

D.O.

Medical interests: Disease prevention, provider wellness, accessible and inclusive care for all.

Language: English

Joined Staff: 2022

Board certification: American Osteopathic Board of Family Physicians

Schooling:

D.O., Rocky Vista University College of Osteopathic Medicine, Parker, CO
Medical residency, Montana Family Medicine Residency, Billings MT
B.S., Cell Biology & Neuroscience; M.S., Health Science, Montana State University, Bozeman

Outside interests: Travel, hiking, reading, baking

Leigh Slagsvold

DNP, APRN, FNP-C

Medical interests: Family care, geriatrics, palliative care

Language: English

Joined Staff: 2023

Schooling:

Doctor of Nursing, Family Nurse Practitioner, Montana State University, Bozeman.
B.S., Nursing, Montana State University, Bozeman

Outside interests: Golf, hiking, biking, spending time with family and friends.

Cooper Smith

D.O.

Medical interests: Sports medicine, wilderness medicine

Language: English

Joined Staff: 2025

Schooling:

D.O., A.T. Still University, Kirksville, MO
B.S., Biology, Grand Canyon University, Phoenix, Ariz.

Outside interests: Mountain biking, hiking, weightlifting, dirt bikes, snowboarding, basketball, and hanging out with friends.

Amy Solomon

M.D.

Medical interests: Belief in care of the whole person, with fellowship training in Integrative Medicine as well as board certification in Addiction Medicine.

Language: English

I care for people with complex medical stories including fatigue, chronic pain, substance use disorders and psychiatric co-morbidities and work as a team with the patient to feel empowered and have a more functional and better quality life.

Joined Staff: 2018

Board certification: American Board of Family Medicine, American Board of Addiction Medicine

Schooling:

M.D., St. Louis University School of Medicine, MO
B.A., psychology, University of California, La Jolla

Outside interests: Spending time with family, going to live music and symphony performances, yoga, especially kundalini yoga, and trying new things like fishing and ukulele.

Craig Stannebein

D.M.D.

NYU-Langone AEGD Faculty

Medical interests: Physiology, biochemistry, repair and healing, replacement

Language: English

Joined Staff: 2020

Schooling:

D.M.D., Oregon Health Sciences University, Portland
Undergraduate degree, Montana State University, Bozeman

Outside interests: Reading, cooking, gardening, hunting and fishing.

Roman Stedman

M.D.

Medical interests: I have a passion for teaching medicine—whether it’s working with medical students, patients or fellow physicians. I’m also deeply curious about the evolving role of AI in healthcare and excited to see how it continues to shape our field.

Language: English

Joined Staff: 2025

Schooling:

M.D., Howard University College of Medicine, Washington, D.C.
University of Arizona, Tucson, Ariz.

Outside interests: I’ll try just about anything—as long as it doesn’t involve jumping out of a plane (though that might be on the agenda tomorrow). I enjoy hiking, camping, video games, cooking, fishing, bowling, baseball, golf, discovering hidden gems, and rewatching my favorite TV shows.

Landon Stevenson

D.O.

Medical interests: Sports medicine, rural practice, including obstetrics and pediatrics.

Language: English

Joined Staff: 2023

Schooling:

Rocky Vista University College of Osteopathic Medicine.
Undergraduate: Brigham Young University, Provo, Utah.

Outside interests: Family time, racing and riding dirt bikes, camping, skiing and snowmobiling.

Eliana Stoppel

M.D.

Medical interests: Full-spectrum family medicine, rural health and continuity of care (outpatient, inpatient & maternity care), maternal and child health, prenatal care, labor and delivery, postpartum and newborn care.

Language: English

Joined Staff: 2025

Schooling:

University of New Mexico School of Medicine, Albuquerque, NM
Undergraduate: B.S., psychology; B.A., biology; B.A., health, medicine and human values/minor in chemistry

Board Certification: American Board of Family Medicine

Outside interests: Hiking, camping, backpacking, cooking and spending time with family and friends.

Laura Stump

M.D.

Medical interests: Preventive care and procedural care

Language: English

Joined Staff: 2023

Schooling:

University of Virginia School of Medicine, Charlottesville, VA.
Undergraduate: B.A. in mechanical engineering Georgia Institute of Technology, Atlanta, GA.

Board Certification: American Board of Family Medicine

Outside interests: Hiking, skiing, cooking and travel

Lucas Teynor

D.O.

Medical interests: Sports medicine, lifestyle medicine, wilderness medicine, emergency medicine, ultrasound
Language: English

Joined Staff: 2024
Schooling:

Rocky Vista University College of Osteopathic Medicine (Parker, CO)
Colorado State University
University of Montana

Outside Interests: I enjoy outdoor activities like skiing, hiking, hunting (rifle and archery), wildlife/landscape photography and golfing. I’m a fan of the Minnesota Vikings, Montana Griz, and Formula 1 racing. In my downtime, I unwind with eSports and video games. I love binge-watching shows, discovering new movies, and spending time with my dogs.

Joey Verlanic

D.M.D.

Dental Director, NYU-Langone AEGD Faculty

Medical interests: Medical/dental integration and community health

Language: English

Joined Staff: 2018

Schooling:

D.M.D., Oregon Health and Sciences University, School of Dentistry, Portland
Undergraduate degree, Montana State University, Bozeman

Outside interests: Hiking, basketball, volleyball, art and travel

Trinity Walter

P.A.-C

Medical interests: Pediatrics and preventive care

Language: English

Joined Staff: 2025

Schooling:

Graduate degree, Rocky Mountain College Master of Physician Assistant Studies, Billings, MT
Undergraduate degree, Rocky Mountain College, Billings, MT

Outside interests: Being outdoors, reading, hanging out with family and friends, sporting events and working out.

Kallie White

Registered Dental Hygienist

Language: English

Joined Staff: 2023

Schooling:

Northern Wyoming Community College, Sheridan, WY

Outside interests: Gardening, riding horses, hiking and fishing.

Holly Wilson

D.O.

Medical interests: Sports medicine, preventative medicine, ultrasound.

Language: English

Joined Staff: 2025

Schooling:

D.O., Rocky Vista University, Ivins, Utah
Fresno State University, Fresno, Calif.

Outside Interests: Running/exercise, hiking, cooking, baking.

Our healthcare providers work as a team to provide the best possible care for you and your family.

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Meet Our Medical Team

Austin Barnhardt

M.D.

Chris Baumert

M.D. – Medical Director

Garth Brand

M.D.

S. Caleb Chang

M.D.

Miranda Chen

M.D.

Bradley Cox

D.O.

Colton Crowther

D.O.

Abby Dalton

P.A.-C

James Denisar-Green

M.D., PhD

Aleah Dorman

DMS, P.A.-C

Maddie du Pont

D.O.

Benjamin Gallaher

M.D.

Paolo Gerbasi

M.D.

Amy Gustafson

D.M.D.

Zach Harder

D.O.

Erin Hixson

M.D.

William Hong

M.D.

Courtney Honken

M.D.

Mackay Hull

D.D.S., M.S., M.D.

Zach Hunter

P.A.-C

Kaci Jansma

P.A.-C

Naomi Keehn

P.A.-C

Katherine Ellis Keith

F.N.P.-C

Julie Kelso

M.D.

Dave Kidman

D.O.

Jacalynn Kim

D.O.

Jonathan Kim

D.O.

Staci Lee

M.D.

Megan Littlefield

M.D.

Matt Lopiano

M.D.

Kelsey Mastel

D.M.D.

Stacy Maynard

D.O., PhD

Regan Mazour

P.A.-C

Ashley McClammy

F.N.P.-C

Shane McCullough

P.A.-C

Shawnell Miller

Registered Dental Hygienist

James Miller

P.A.-C

Kindra Munda

Registered Dental Hygienist

Mary Nessan