Owen L. Mayer, MD
Anesthesiology Physician · Missoula, MT
Owen L. Mayer, MD is an anesthesiology physician with a practice address in Missoula, Montana, and NPI 1770143653, issued on Jun 13, 2019. Check the license (Montana 120508, as entered in NPPES) on the Montana Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Owen L. Mayer
- Credential
- MD
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- 120508 MT
Self-reported in NPPES; status is on the state search - Practice location
- 500 W Broadway St, Missoula, MT 59802
- Phone
- (425) 407-1500
- Enumerated
- Jun 13, 2019
- Record last updated
- May 26, 2023
- Medicare enrollment
- Enrolled (PECOS I20230607002285); accepts Medicare assignment
- Medical or professional school
- State University Of New York At Buffalo School Of Medicine, 2019
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 227 in Montana → Look up another NPI →
Also registered at 500 W Broadway St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Owen L. Mayer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical Examiners
Search for license 120508Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Missoula Anesthesiology PCMissoula, MT
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Owen L. Mayer among 227 anesthesiology physician records in Montana
Owen L. Mayer, MD 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 2019, is newer than 95% of them.
- NPI issued2019 · 95% of these records are older, 4% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2019 · median 2006 among the 167 with a school on file
- Record last updated2023 · 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).
63 anesthesiology physician records list a practice address in Missoula
They are 63 of the 3,567 NPPES records with a practice address in Missoula, and 227 anesthesiology physician records in Montana.
All 227 in Montana → Every provider in Missoula → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Deann Birnel, M.D.Missoula, MT 598021699765602
- Molly Brazil, MDMissoula, MT 598021295354280
- Eric Fox, M.D.Missoula, MT 598021558789867
- John Harris, MDMissoula, MT 598021912420845
- Tyler Jacobsen, MDMissoula, MT 598021205412038
- Kelsey Walton, MDMissoula, MT 598021124655923
- Gerald Siemens, MDMissoula, MT 598031447505045
- Steven Roberts, DOMissoula, MT 598041760045702
Common questions
What is Owen L. Mayer, MD's NPI number?
Owen L. Mayer, MD's National Provider Identifier (NPI) is 1770143653, issued on Jun 13, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Owen L. Mayer, MD located?
The NPPES record lists a practice address at 500 W Broadway St, Missoula, MT, 59802. Phone: (425) 407-1500. Providers update this record themselves, so call before visiting.
How can I verify Owen L. Mayer, MD's license?
NPPES lists Montana license number 120508, 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.
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.