John W. Mahan, MD
Hospitalist Physician · Great Falls, MT
John W. Mahan, MD is a hospitalist physician with a practice address in Great Falls, Montana, and NPI 1346241296, issued on Aug 2, 2005. Check the license (Montana 7173, as entered in NPPES) on the Montana Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- John W. Mahan
- Credential
- MD
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- 7173 MT
Self-reported in NPPES; status is on the state search - Practice location
- 1101 26TH St S, Great Falls, MT 59405
- Phone
- (406) 731-8888
- Enumerated
- Aug 2, 2005
- Record last updated
- Apr 8, 2024
- Fax
- (406) 731-8876
- Medicaid ID
- 0096720 MT
- Medicare enrollment
- Enrolled (PECOS I20130513000427); accepts Medicare assignment
- Medical or professional school
- University Of New Mexico School Of Medicine, 1989
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 101 in Montana → Look up another NPI →
Also registered at 1101 26TH St S
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John W. Mahan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical Examiners
Search for license 7173Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4% more Medicare Part D claims than the average hospitalist physician in 2024
543 Medicare Part D claims for 105 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium34 claims
- Trazodone Hcl31 claims
- Amlodipine Besylate27 claims
- Losartan Potassium20 claims
- Pantoprazole Sodium20 claims
- Eliquis18 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 80.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
One hospital affiliation
- Benefis Hospitals IncGreat Falls, MT · 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.
John W. Mahan among 101 hospitalist physician records in Montana
John W. Mahan, MD is one of 101 hospitalist physician records with a practice address in Montana. 91% 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, 87% newer
- In a Medicare fileYes · 91% of these records are
- In the CMS Doctors and Clinicians fileYes · 78% of these records are
- Graduated1989 · median 2012 among the 79 with a school on file
- Record last updated2024 · 17% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
38 hospitalist physician records list a practice address in Great Falls
They are 38 of the 1,798 NPPES records with a practice address in Great Falls, and 101 hospitalist physician records in Montana.
All 101 in Montana → Every provider in Great Falls → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Richard Blevins, MDGreat Falls, MT 594051851392740
- Anna Christensen, MDGreat Falls, MT 594051124007943
- Nishan Dallakoti, M.D.Great Falls, MT 594051841484359
- James Geren, MDGreat Falls, MT 594051245325851
- Sukant Gupta, MDGreat Falls, MT 594051588639454
- Luba Hafkin, M.D.Great Falls, MT 594051942407028
- James Harkness, D.O.Great Falls, MT 594051376502658
- Chu Hong, MDGreat Falls, MT 594051124029004
Common questions
What is John W. Mahan, MD's NPI number?
John W. Mahan, MD's National Provider Identifier (NPI) is 1346241296, issued on Aug 2, 2005. An NPI identifies a provider in billing; it is not a license.
Where is John W. Mahan, MD located?
The NPPES record lists a practice address at 1101 26TH St S, Great Falls, MT, 59405. Phone: (406) 731-8888. Providers update this record themselves, so call before visiting.
How can I verify John W. Mahan, MD's license?
NPPES lists Montana license number 7173, 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 John W. Mahan, MD prescribe under Medicare Part D?
In 2024, John W. Mahan, MD had 543 Medicare Part D claims for 105 beneficiaries; the average among hospitalist physician prescribers was 521. Part D covers Medicare prescriptions only.
What is John W. Mahan, MD's MIPS final score?
The 2023 MIPS final score is 80.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.