Margaret C. Kosnar, MD
Family Medicine Physician · Billings, MT
Margaret C. Kosnar, MD is a family medicine physician with a practice address in Billings, Montana, and NPI 1669645669, issued on Apr 10, 2008. Check the license (Montana 11813, as entered in NPPES) on the Montana Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Margaret C. Kosnar
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 11813 MT
Self-reported in NPPES; status is on the state search - Practice location
- 2675 Central Ave, Billings, MT 59102
- Phone
- (406) 238-2500
- Enumerated
- Apr 10, 2008
- Record last updated
- Dec 4, 2014 (not updated in 12 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20251104000167); accepts Medicare assignment
- Medical or professional school
- University Of North Carolina At Chapel Hill School Of Medicine, 2007
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 775 in Montana → Look up another NPI →
Also registered at 2675 Central Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nancy Anderson Porter, MPTPhysical Therapist1720188303
- Krista Bakkedahl, DPTPhysical Therapist1255583753
- Leslie Bennington, OTOccupational Therapist1841219706
- Jonalyn Brown, STSpeech-Language Pathologist1467521534
- David Bryer, D.D.S.General Practice Dentistry1861548133
- Shelly Castles, MDFamily Medicine Physician1952410953
Verify Margaret C. Kosnar in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical Examiners
Search for license 11813Check 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
- Medstar Urgent Care LLCWheaton, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Margaret C. Kosnar among 775 family medicine physician records in Montana
Margaret C. Kosnar, MD is one of 775 family medicine 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 2008, is newer than 60% of them.
- NPI issued2008 · 60% of these records are older, 35% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2007 · median 2007 among the 464 with a school on file
- Record last updated2014 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
111 family medicine physician records list a practice address in Billings
They are 111 of the 4,035 NPPES records with a practice address in Billings, and 775 family medicine physician records in Montana.
All 775 in Montana → Every provider in Billings → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Jon Bullman, MDBillings, MT 591021255373411
- Shelly Castles, MDBillings, MT 591021952410953
- Heidi Duncan, MDBillings, MT 591021376645341
- Daniel Gall, MDBillings, MT 591021992817951
- Donald Grewell, DOBillings, MT 591021326150285
- Lawrence Hemmer, MDBillings, MT 591021073625463
- Vernon Johnson, MDBillings, MT 591021679568190
- James King, MDBillings, MT 591021174625271
Common questions
What is Margaret C. Kosnar, MD's NPI number?
Margaret C. Kosnar, MD's National Provider Identifier (NPI) is 1669645669, issued on Apr 10, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Margaret C. Kosnar, MD located?
The NPPES record lists a practice address at 2675 Central Ave, Billings, MT, 59102. Phone: (406) 238-2500. Providers update this record themselves, so call before visiting.
How can I verify Margaret C. Kosnar, MD's license?
NPPES lists Montana license number 11813, 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.