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

Dr. William Gibson Simpson, MD

Individual provider Gastroenterology Physician · NPI 1487655346

Dr. William Gibson Simpson, MD is a Gastroenterology in Kalispell, Montana. Graduated from University of Kentucky College of Medicine in 1998, 28 years ago. Practices with Northeastern Health System, a 104-clinician group and accepts Medicare assignment. Licensed in Montana, Oklahoma and Texas.

Years since qualifying
28
Trained at
University of Kentucky College of Medicine
Licensed in
MT, OK, TX
In the registry since
2005
Specialties on file
3
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

320 Sunnyview Ln
Kalispell, MT 59901-3129
Phone: (406) 752-7441
Show map & directions

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

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 79718 (MT)
Gastroenterology Physician Taxonomy 207RG0100X · Licence 30937 (OK)
Gastroenterology Physician Taxonomy 207RG0100X · Licence J5017 (TX)

Record details

NPI number1487655346
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 2, 2005
Last updated in NPPESNovember 27, 2023
Certification dateJune 29, 2020
Mailing address320 Sunnyview Ln, Kalispell, MT 59901-3129

Medicare enrollment

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

Medicare specialtyGASTROENTEROLOGY
Medical schoolUNIVERSITY OF KENTUCKY COLLEGE OF MEDICINE
Graduated 1998 (28 years in practice)
Group practice Northeastern Health System — 104 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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