Maria Z. Michnowska, M.D.
Internal Medicine Physician · San Andreas, CA
Maria Z. Michnowska, M.D. is an internal medicine physician with a practice address in San Andreas, California, and NPI 1336261106, issued on Apr 4, 2007. Check the license (California A73232, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Maria Z. Michnowska
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A73232 CA
Self-reported in NPPES; status is on the state search - Practice location
- 704 Mountain Ranch RD, San Andreas, CA 95249
- Phone
- (209) 754-4564
- Enumerated
- Apr 4, 2007
- Record last updated
- Apr 29, 2010 (not updated in 16 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20040220001181); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 704 Mountain Ranch RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Adrianna CastleStudent in an Organized Health Care Education/Training Program1699484352
- Karen Karam, LCSWClinical Social Worker1316336746
- Karen Pekarcik, LCSW 80071Clinical Social Worker1235411513
Verify Maria Z. Michnowska in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A73232Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average internal medicine physician in 2024
139 Medicare Part D claims for 81 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Levofloxacin23 claims
- Amoxicillin-Clavulanate Potass11 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.
Bills Medicare through one group practice
- Community Medical Team Acute Care CorporationSan Andreas, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
4 internal medicine physician records list a practice address in San Andreas
They are 4 of the 208 NPPES records with a practice address in San Andreas, and 17,696 internal medicine physician records in California.
All 4 in San Andreas → All 17,696 in California → Every provider in San Andreas →
Other internal medicine physician records in California
- Jacob Aaron, MDSan Francisco, CA1407202518
- Alistair Aaronson, MDStanford, CA1457628760
- Jose Abad., MDSacramento, CA1144607219
- Donna Abare, MDOakland, CA1386722155
- Marce AbareScotts Valley, CA1457744708
- Samuel Abarte, M.D.Chula Vista, CA1578535498
- Alexander Abary, MDLong Beach, CA1104995919
- Luba Abascal, MDSan Francisco, CA1023180874
- Michael Abate, MDSacramento, CA1548248131
- Wali Abawi, D.O.Joshua Tree, CA1104362268
Common questions
What is Maria Z. Michnowska, M.D.'s NPI number?
Maria Z. Michnowska, M.D.'s National Provider Identifier (NPI) is 1336261106, issued on Apr 4, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Maria Z. Michnowska, M.D. located?
The NPPES record lists a practice address at 704 Mountain Ranch RD, San Andreas, CA, 95249. Phone: (209) 754-4564. Providers update this record themselves, so call before visiting.
How can I verify Maria Z. Michnowska, M.D.'s license?
NPPES lists California license number A73232, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Maria Z. Michnowska, M.D. prescribe under Medicare Part D?
In 2024, Maria Z. Michnowska, M.D. had 139 Medicare Part D claims for 81 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.