Roger Joseph Diegel, MD
Rheumatology Physician · Kalispell, MT
Roger Joseph Diegel, MD is a rheumatology physician with a practice address in Kalispell, Montana, and NPI 1770660896, issued on Nov 1, 2006. Check the license (Montana 10616, as entered in NPPES) on the Montana Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Roger Joseph Diegel
- Credential
- MD
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- 10616 MT
Self-reported in NPPES; status is on the state search - Practice location
- 150 Commons Way, Kalispell, MT 59901
- Phone
- (406) 752-2010
- Enumerated
- Nov 1, 2006
- Record last updated
- Nov 27, 2023
- Fax
- (406) 752-2047
- Medicare enrollment
- Enrolled (PECOS I20041027001035); accepts Medicare assignment
- Medical or professional school
- Wayne State University School Of Medicine, 1993
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 20 in Montana → Look up another NPI →
Also registered at 150 Commons Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Cheryl Burnett, FNPFamily Nurse Practitioner1467019141
- Meghan Duvall, FNPFamily Nurse Practitioner1336765379
- Bernadette Vanbelois, M.D.Rheumatology Physician1740360676
Verify Roger Joseph Diegel in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical Examiners
Search for license 10616Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
51% more Medicare Part D claims than the average rheumatology physician in 2024
2,988 Medicare Part D claims for 442 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 144 claims were for opioids.
Most prescribed
- Hydroxychloroquine Sulfate636 claims
- Methotrexate494 claims
- Prednisone399 claims
- Alendronate Sodium121 claims
- Allopurinol97 claims
- Meloxicam77 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: $282.39
14 payments; by number, the most common kind was food and beverage; the largest payer was Lilly USA, LLC. The 4,486 providers of this specialty with any payment received $8,538.33 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.
Bills Medicare through one group practice
- Kalispell Regional Medical Center IncKalispell, MT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Roger Joseph Diegel among 20 rheumatology physician records in Montana
Roger Joseph Diegel, MD is one of 20 rheumatology physician records with a practice address in Montana. 70% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 15% of them.
- NPI issued2006 · 15% of these records are older, 45% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated1993 · median 2002 among the 13 with a school on file
- Record last updated2023 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in Montana
There are 20 rheumatology physician records in Montana.
All 20 in Montana → Every provider in Kalispell → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Bernadette Vanbelois, M.D.Kalispell, MT 599011740360676
- Rebecca Belsom, M.D.Missoula, MT 598021063604338
- Ann Corsi, MDMissoula, MT 598021568418630
- Rebecca Danforth, M.D.Missoula, MT 598021164570172
- Susan English, M.D.Missoula, MT 598021144243155
- Melody Nelsen, M.D.Missoula, MT 598021669519930
- Vaani Jegapragasan, MDBozeman, MT 597151295950756
- Matthew Kirkpatrick, M.D.Bozeman, MT 597151437449337
Common questions
What is Roger Joseph Diegel, MD's NPI number?
Roger Joseph Diegel, MD's National Provider Identifier (NPI) is 1770660896, issued on Nov 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Roger Joseph Diegel, MD located?
The NPPES record lists a practice address at 150 Commons Way, Kalispell, MT, 59901. Phone: (406) 752-2010. Providers update this record themselves, so call before visiting.
How can I verify Roger Joseph Diegel, MD's license?
NPPES lists Montana license number 10616, 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 Roger Joseph Diegel, MD prescribe under Medicare Part D?
In 2024, Roger Joseph Diegel, MD had 2,988 Medicare Part D claims for 442 beneficiaries; the average among rheumatology physician prescribers was 1,978. 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.