Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. John Madison Clair, DO

Individual provider Internal Medicine Physician · NPI 1427232354

Dr. John Madison Clair, DO is a Hospitalist in Williston, North Dakota. Graduated from West Virginia School of Osteopathic Medicine in 2006, 20 years ago. Practices with Mercy Medical Center, a 80-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in North Dakota and Nevada.

Years since qualifying
20
Trained at
West Virginia School of Osteopathic Medicine
Licensed in
ND, NV
In the registry since
2007
Specialties on file
4
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

See every abbreviation used in this directory →

Practice location Address checks out

1301 15th Ave W
Williston, ND 58801-3821
Phone: (701) 774-7400
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 6857 W Charleston Blvd, Las Vegas, NV 89117-1600 — (702) 304-2144

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 13540 (ND)
Internal Medicine Physician Taxonomy 207R00000X · Licence DO1452 (NV)
Hospitalist Physician Taxonomy 208M00000X · Licence DO1452 (NV)
Hospitalist Physician Taxonomy 208M00000X · Licence 13540 (ND)

Record details

NPI number1427232354
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedDecember 27, 2007
Last updated in NPPESJuly 21, 2022
Mailing address1301 15th Ave W, Williston, ND 58801-3821

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyHOSPITALIST
Also practisesINTERNAL MEDICINE
Medical schoolWEST VIRGINIA SCHOOL OF OSTEOPATHIC MEDICINE
Graduated 2006 (20 years in practice)
Group practice Mercy Medical Center — 80 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

Other providers in Williston