Riley Sean Grogan, MD
Surgery Physician · Missoula, MT
Riley Sean Grogan, MD is a surgery physician with a practice address in Missoula, Montana, and NPI 1669935631, issued on Apr 8, 2019. Check the license (Montana MED-PHYS-LIC-156377, as entered in NPPES) on the Montana Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Riley Sean Grogan
- Credential
- MD
- Primary taxonomy
- Surgery Physician 208600000X
- License numbers
- MED-PHYS-LIC-156377 MT
74548-20 WI
Self-reported in NPPES; status is on the state search - Practice location
- 500 W Broadway St FL 4BB, Missoula, MT 59802
- Phone
- (406) 329-5828
- Enumerated
- Apr 8, 2019
- Record last updated
- Nov 16, 2025
- Fax
- (406) 329-5864
- Medicare enrollment
- Enrolled (PECOS I20251007001011); accepts Medicare assignment
- Medical or professional school
- University Of Washington School Of Medicine, 2019
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 136 in Montana → Look up another NPI →
Also registered at 500 W Broadway St FL 4BB
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Elise Abicht, MDObstetrics & Gynecology Physician1497071054
- Ryan Bachofer, MDColon & Rectal Surgery Physician1700444197
Verify Riley Sean Grogan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical Examiners
Search for license MED-PHYS-LIC-156377Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
44% fewer Medicare Part D claims than the average surgery physician in 2024
82 Medicare Part D claims for 38 beneficiaries, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D. 30 claims were for opioids.
Most prescribed
- Methocarbamol23 claims
- Oxycodone Hcl18 claims
- Tramadol Hcl11 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: $67.36
3 payments; by number, the most common kind was food and beverage; the largest payer was Medical Device Business Services, Inc. The 17,103 providers of this specialty with any payment received $3,513.80 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
- Providence Health And Services MtMissoula, MT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Riley Sean Grogan among 136 surgery physician records in Montana
Riley Sean Grogan, MD is one of 136 surgery physician records with a practice address in Montana. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 95% of them.
- NPI issued2019 · 95% of these records are older, 2% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2019 · median 2003 among the 92 with a school on file
- Record last updated2025 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208600000X and a Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgery Physician providers in Montana
There are 136 surgery physician records in Montana.
All 136 in Montana → Every provider in Missoula → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- Lori Grimsley, MDMissoula, MT 598021134231798
- Deron Ludwig, MDMissoula, MT 598021245310200
- John Pickens, M.D.Missoula, MT 598021487793485
- John Pickhardt, MDMissoula, MT 598021346283629
- Charles Swannack, MDMissoula, MT 598021033152327
- Stuart Allyn, DDS, MDMissoula, MT 598011073016028
- Vern Horton, MDMissoula, MT 598041073597639
- Dillon Morris, MDMissoula, MT 598041649776204
Common questions
What is Riley Sean Grogan, MD's NPI number?
Riley Sean Grogan, MD's National Provider Identifier (NPI) is 1669935631, issued on Apr 8, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Riley Sean Grogan, MD located?
The NPPES record lists a practice address at 500 W Broadway St FL 4BB, Missoula, MT, 59802. Phone: (406) 329-5828. Providers update this record themselves, so call before visiting.
How can I verify Riley Sean Grogan, MD's license?
NPPES lists Montana license number MED-PHYS-LIC-156377, 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 Riley Sean Grogan, MD prescribe under Medicare Part D?
In 2024, Riley Sean Grogan, MD had 82 Medicare Part D claims for 38 beneficiaries; the average among surgery physician prescribers was 147. 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.