Stephen Kotarek, PA
Medical Physician Assistant · Marysville, CA
Stephen Kotarek, PA is a medical physician assistant with a practice address in Marysville, California, and NPI 1235371915, issued on Mar 27, 2009. Check the license (California PA19292, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Stephen Kotarek
- Credential
- PA
- Primary taxonomy
- Medical Physician Assistant 363AM0700X
- License number
- PA19292 CA
Self-reported in NPPES; status is on the state search - Practice location
- 414 G St Ste 221, Marysville, CA 95901
- Phone
- (916) 733-5090
- Enumerated
- Mar 27, 2009
- Record last updated
- Nov 25, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20130827000059); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 414 G St Ste 221
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Gordon Macbeth, M.D.Vascular Surgery Physician1629185228
Verify Stephen Kotarek in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA19292Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
47% fewer Medicare Part D claims than the average medical physician assistant in 2024
606 Medicare Part D claims for 72 beneficiaries, against an average of 1,148 among the 23,801 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims.
Most prescribed
- Quetiapine Fumarate65 claims
- Lamotrigine45 claims
- Prazosin Hcl35 claims
- Lurasidone Hcl23 claims
- Aripiprazole21 claims
- Fluoxetine Hcl21 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 2 group practices
- Northbay Health Medical FoundationVacaville, CA
- Northbay Physicians Surgery Center, LLCVacaville, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Medical Physician Assistant providers in California
There are 3,376 medical physician assistant records in California.
Other medical physician assistant records in California
- Bridget Abajian, PA-CLos Angeles, CA1518677061
- Crispin Abbott, PHYSICIAN ASSISTANTThousand Oaks, CA1063467926
- Abdol Hamid Abdali Hajiabadi, P.A.Santa Ana, CA1285747964
- Jilbert Abnoosian, PALynwood, CA1447300314
- Reema Aboelrish, PA-CFresno, CA1376466144
- Sakina Abowath, P.A.Diamond Bar, CA1326287525
- Selin Abraamyan, PA-CGlendale, CA1144795899
- Antonious Abraham, PA-CCovina, CA1003434275
- Michelle AbrahamSacramento, CA1952875957
- Therese Abraham, P.A.-CGlendale, CA1063726586
Common questions
What is Stephen Kotarek, PA's NPI number?
Stephen Kotarek, PA's National Provider Identifier (NPI) is 1235371915, issued on Mar 27, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Stephen Kotarek, PA located?
The NPPES record lists a practice address at 414 G St Ste 221, Marysville, CA, 95901. Phone: (916) 733-5090. Providers update this record themselves, so call before visiting.
How can I verify Stephen Kotarek, PA's license?
NPPES lists California license number PA19292, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Stephen Kotarek, PA prescribe under Medicare Part D?
In 2024, Stephen Kotarek, PA had 606 Medicare Part D claims for 72 beneficiaries; the average among medical physician assistant prescribers was 1,148. 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.