Mary Caroline Deigert, PAC
Physician Assistant · Billings, MT
Mary Caroline Deigert, PAC is a physician assistant with a practice address in Billings, Montana, and NPI 1306890041, issued on May 19, 2006. Check the license (Montana 450, as entered in NPPES) with the Montana board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mary Caroline Deigert
- Credential
- PAC
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 450 MT
Self-reported in NPPES; status is on the state search - Practice location
- 123 S 27TH St, Billings, MT 59101
- Phone
- (406) 247-3350
- Enumerated
- May 19, 2006
- Record last updated
- Oct 12, 2023
- Fax
- (406) 247-3389
- Medicare enrollment
- Enrolled (PECOS I20060525000140); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 698 in Montana → Look up another NPI →
Also registered at 123 S 27TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Hannah Akard, RNCase Management Registered Nurse1346938750
- Doug AndersenSocial Worker1619392321
- Rachel AndersonRegistered Dietitian1174847099
- Tammi Anderson, LCPC, LACMental Health Counselor1083956783
Verify Mary Caroline Deigert in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Montana board licenses this profession
Search for license 450Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average physician assistant in 2024
68 Medicare Part D claims for 19 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of 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.
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.
Mary Caroline Deigert among 698 physician assistant records in Montana
Mary Caroline Deigert, PAC is one of 698 physician assistant records with a practice address in Montana. 84% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 77% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated2005 · median 2016 among the 514 with a school on file
- Record last updated2023 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
170 physician assistant records list a practice address in Billings
They are 170 of the 4,035 NPPES records with a practice address in Billings, and 698 physician assistant records in Montana.
All 698 in Montana → Every provider in Billings → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Susan Cerovski, PABillings, MT 591011891771622
- Linda Dupree, PACBillings, MT 591011073516167
- John Etchart, PA-CBillings, MT 591011124010830
- Kathryn Hall, PA-CBillings, MT 591011366438285
- Myrna Mentikov, PA-CBillings, MT 591011750377735
- Lisa Murray, PA-CBillings, MT 591011821084369
- Deanna Niles, PA-CBillings, MT 591011881666261
- Mark Pierson, PA-CBillings, MT 591011508858234
Common questions
What is Mary Caroline Deigert, PAC's NPI number?
Mary Caroline Deigert, PAC's National Provider Identifier (NPI) is 1306890041, issued on May 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mary Caroline Deigert, PAC located?
The NPPES record lists a practice address at 123 S 27TH St, Billings, MT, 59101. Phone: (406) 247-3350. Providers update this record themselves, so call before visiting.
How can I verify Mary Caroline Deigert, PAC's license?
NPPES lists Montana license number 450, as entered by the provider. Search the Montana board that licenses this profession; the NPPES record confirms identity only.
How much does Mary Caroline Deigert, PAC prescribe under Medicare Part D?
In 2024, Mary Caroline Deigert, PAC had 68 Medicare Part D claims for 19 beneficiaries; the average among physician assistant prescribers was 830. 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.