Marvin L. Warren, M.D.
Anesthesiology Physician · Billings, MT
Marvin L. Warren, M.D. is an anesthesiology physician with a practice address in Billings, Montana, and NPI 1386733327, issued on Oct 11, 2006. Check the license (Montana 5217, as entered in NPPES) on the Montana Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Marvin L. Warren
- Credential
- M.D.
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- 5217 MT
Self-reported in NPPES; status is on the state search - Practice location
- 2800 10TH Ave N, Billings, MT 59101
- Phone
- (406) 896-2447
- Enumerated
- Oct 11, 2006
- Record last updated
- Jan 29, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20101116001066); accepts Medicare assignment
- Medical or professional school
- University Of Kansas School Of Med (Kc/Wich/Sal), 1980
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 227 in Montana → Look up another NPI →
Also registered at 2800 10TH Ave N
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ellen Absher, FNP-CFamily Nurse Practitioner1609709997
- Kimberly Ackerman, FNPAdult Health Nurse Practitioner1922032861
- Deborah Agnew, MDPediatrics Physician1134178072
- Stefan AlinteCertified Registered Nurse Anesthetist1518899053
- Erin Allen, MDPediatrics Physician1801052758
- Nathan Allen, M.D.Emergency Medicine Physician1356676878
Verify Marvin L. Warren in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical Examiners
Search for license 5217Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The MIPS final score for 2023 (Medicare payment program): 94.3 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
One hospital affiliation
- Billings ClinicBillings, MT · Acute Care Hospitals4 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.
Marvin L. Warren among 227 anesthesiology physician records in Montana
Marvin L. Warren, M.D. is one of 227 anesthesiology physician records with a practice address in Montana. 81% 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 12% of them.
- NPI issued2006 · 12% of these records are older, 47% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated1980 · median 2006 among the 167 with a school on file
- Record last updated2020 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
67 anesthesiology physician records list a practice address in Billings
They are 67 of the 4,035 NPPES records with a practice address in Billings, and 227 anesthesiology physician records in Montana.
All 227 in Montana → Every provider in Billings → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Charles Aragon, M.D.Billings, MT 591011093782591
- Zeferino Arroyo, D.O.Billings, MT 591011285601096
- Stephen Ball, M.D.Billings, MT 591011417924226
- Kert Christensen, D.O.Billings, MT 591011063489771
- Douglas Cornelius, M.D.Billings, MT 591011588631204
- Howard Harvey, M.D.Billings, MT 591011922071588
- Debra Jones, M.D.Billings, MT 591011023085677
- Gary Mermel, M.D.Billings, MT 591011558338103
Common questions
What is Marvin L. Warren, M.D.'s NPI number?
Marvin L. Warren, M.D.'s National Provider Identifier (NPI) is 1386733327, issued on Oct 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Marvin L. Warren, M.D. located?
The NPPES record lists a practice address at 2800 10TH Ave N, Billings, MT, 59101. Phone: (406) 896-2447. Providers update this record themselves, so call before visiting.
How can I verify Marvin L. Warren, M.D.'s license?
NPPES lists Montana license number 5217, 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.
What is Marvin L. Warren, M.D.'s MIPS final score?
The 2023 MIPS final score is 94.3 of 100. 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.