Mikael Siewert, P.A.
Physician Assistant · San Francisco, CA
Mikael Siewert, P.A. is a physician assistant with a practice address in San Francisco, California, and NPI 1366538647, issued on Oct 5, 2006. Check the license with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mikael Siewert
- Credential
- P.A.
- Primary taxonomy
- Physician Assistant 363A00000X
- Practice location
- 3838 California St, San Francisco, CA 94118
- Phone
- (415) 592-2014
- Enumerated
- Oct 5, 2006
- Entity
- Type 1 · individual
Also registered at 3838 California St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Catherine Berger-Dujmovic, MDObstetrics & Gynecology Physician1467470070
Verify Mikael Siewert in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
1% more Medicare Part D claims than the average physician assistant in 2024
843 Medicare Part D claims for 272 beneficiaries, against an average of 832 among the 95,030 providers of this specialty who prescribed in Part D. 241 claims were for opioids.
Most prescribed
- Oxycodone Hcl170 claims
- Ondansetron Odt165 claims
- Celecoxib120 claims
- Omeprazole113 claims
- Amoxicillin92 claims
- Hydrocodone-Acetaminophen47 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 or facility affiliation
- Permanente Medical Group IncRichmond, CA
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Physician Assistant providers in California
There are 13,861 physician assistant records in California.
All 13,861 in California → Every provider in San Francisco →
Other physician assistant records in California
- Marcia -Galbraith, PAStockton, CA1407143274
- Danny Abad, PAOrange, CA1477158673
- Lea Dominique Abadies, PATustin, CA1124754254
- Rea Elizabeth Abaniel, P.A.-CSeal Beach, CA1396173621
- Ramina Abbasi, PA-CSignal Hill, CA1093448300
- Ariel Abbott, PA-CStockton, CA1780334342
- Barrie Abbott, PA-CAnza, CA1861602575
- Elizabeth Abbott, PA-CSan Diego, CA1437540762
- Angela Abboud, MMS, PA-CSanta Rosa, CA1114399334
- Fatimeh Abdallah, P.A.-CNewport Beach, CA1487002218
Common questions
What is Mikael Siewert, P.A.'s NPI number?
Mikael Siewert, P.A.'s National Provider Identifier (NPI) is 1366538647, issued on Oct 5, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mikael Siewert, P.A. located?
The NPPES record lists a practice address at 3838 California St, San Francisco, CA, 94118. Phone: (415) 592-2014. Providers update this record themselves, so call before visiting.
How can I verify Mikael Siewert, P.A.'s license?
Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Mikael Siewert, P.A. prescribe under Medicare Part D?
In 2024, Mikael Siewert, P.A. had 843 Medicare Part D claims for 272 beneficiaries; the average among physician assistant prescribers was 832. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.