William Gibson Simpson, M.D.
Gastroenterology Physician · Kalispell, MT
William Gibson Simpson, M.D. is a gastroenterology physician with a practice address in Kalispell, Montana, and NPI 1487655346, issued on Aug 2, 2005. Check the license (Montana 79718, as entered in NPPES) on the Montana Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- William Gibson Simpson
- Credential
- M.D.
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License numbers
- 79718 MT
30937 OK
J5017 TX
Self-reported in NPPES; status is on the state search - Practice location
- 320 Sunnyview LN, Kalispell, MT 59901
- Phone
- (406) 752-7441
- Enumerated
- Aug 2, 2005
- Record last updated
- Nov 27, 2023
- Medicaid ID
- 105169003 TX
- Medicare enrollment
- Enrolled (PECOS I20150122000888); accepts Medicare assignment
- Medical or professional school
- University Of Kentucky College Of Medicine, 1998
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 44 in Montana → Look up another NPI →
Also registered at 320 Sunnyview LN
A shared address usually means a shared clinic or building; it does not show who employs whom.
- James Abraham, RPARadiology Practitioner Assistant1760646400
- Amanda Beer, M.D.Diagnostic Radiology Physician1568786234
- William Benedetto, M.D.Diagnostic Radiology Physician1750452983
- Nick Cantrell, M.D.Diagnostic Radiology Physician1114185303
- Amy CheeksFamily Nurse Practitioner1770001745
- Earl Chester, M.D.Diagnostic Radiology Physician1740418136
Verify William Gibson Simpson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical Examiners
Search for license 79718Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% more Medicare Part D claims than the average gastroenterology physician in 2024
1,468 Medicare Part D claims for 376 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims.
Most prescribed
- Pantoprazole Sodium758 claims
- Esomeprazole Magnesium70 claims
- Famotidine57 claims
- Carvedilol50 claims
- Omeprazole48 claims
- Spironolactone33 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $67.91
2 payments; by number, the most common kind was food and beverage; the largest payer was Takeda Pharmaceuticals U.S.A., Inc. The 13,350 providers of this specialty with any payment received $5,015.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
One hospital affiliation
- Northeastern Health SystemTahlequah, OK · Acute Care Hospitals2 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
William Gibson Simpson among 44 gastroenterology physician records in Montana
William Gibson Simpson, M.D. is one of 44 gastroenterology physician records with a practice address in Montana. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 84% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated1998 · median 1995 among the 30 with a school on file
- Record last updated2023 · 41% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Montana
There are 44 gastroenterology physician records in Montana.
All 44 in Montana → Every provider in Kalispell → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Ramon Generoso, MDKalispell, MT 599011326029281
- Craig Harrison, MDKalispell, MT 599011265493910
- Annie Heermans, MDKalispell, MT 599011386098465
- Philip Jaffe, MDKalispell, MT 599011477534337
- Juergen Mueller, M.D.Kalispell, MT 599011376636043
- Howard Tice, MDKalispell, MT 599011215998505
- Scott Cooper, M.D.Missoula, MT 598081821275900
- Casey Kolendich, M.D.Missoula, MT 598081669511606
Common questions
What is William Gibson Simpson, M.D.'s NPI number?
William Gibson Simpson, M.D.'s National Provider Identifier (NPI) is 1487655346, issued on Aug 2, 2005. An NPI identifies a provider in billing; it is not a license.
Where is William Gibson Simpson, M.D. located?
The NPPES record lists a practice address at 320 Sunnyview LN, Kalispell, MT, 59901. Phone: (406) 752-7441. Providers update this record themselves, so call before visiting.
How can I verify William Gibson Simpson, M.D.'s license?
NPPES lists Montana license number 79718, as entered by the provider. Search the Montana Board of Medical Examiners at https://ebiz.mt.gov/POL/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Gibson Simpson, M.D. prescribe under Medicare Part D?
In 2024, William Gibson Simpson, M.D. had 1,468 Medicare Part D claims for 376 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.