Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Marvin L Warren, MD

Individual provider Anesthesiology Physician · NPI 1386733327

Marvin L Warren, MD is an Anesthesiology in Billings, Montana. Graduated from University of Kansas School of Med (KC/WICH/SAL) in 1980, 46 years ago. Practices with Billings Clinic, a 805-clinician group and accepts Medicare assignment. Licensed in Montana.

Years since qualifying
46
Trained at
University of Kansas School of Med (KC/WICH/SAL)
Licensed in
MT
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

2800 10th Ave N
Billings, MT 59101-0703
Phone: (406) 896-2447
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence 5217 (MT)

Record details

NPI number1386733327
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedOctober 11, 2006
Last updated in NPPESJanuary 29, 2020
Certification dateJanuary 29, 2020
Mailing addressPo Box 1155, Billings, MT 59103-1155

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyANESTHESIOLOGY
Medical schoolUNIVERSITY OF KANSAS SCHOOL OF MED (KC/WICH/SAL)
Graduated 1980 (46 years in practice)
Group practice Billings Clinic — 805 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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