Stephen Kotarek, PA
NPI 1235371915 · Medical Physician Assistant · Marysville, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Kotarek, PA is a Medical Physician Assistant provider in Marysville, CA (NPI 1235371915).
Provider details
- NPI number
- 1235371915
- Entity type
- Individual
- Primary specialty
- Medical Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA
- Sex
- Male
- Sole proprietor
- No
- License
- PA19292 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
17 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Quetiapine Fumarate | 65 | 17 |
| Lamotrigine | 45 | 13 |
| Prazosin Hcl | 35 | 12 |
| Lurasidone Hcl | 23 | — |
| Fluoxetine Hcl | 21 | — |
| Aripiprazole | 21 | — |
| Lorazepam | 21 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-03-27
- Last updated
- 2019-11-25
Frequently asked questions
- What is Stephen Kotarek's NPI number?
- Stephen Kotarek's National Provider Identifier (NPI) is 1235371915, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Kotarek's specialty?
- Stephen Kotarek is listed in the NPPES registry with a primary specialty of Medical Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Stephen Kotarek located?
- Stephen Kotarek's practice location on file with NPPES is 414 G St Ste 221, Marysville, CA 95901-5670.
- What is Stephen Kotarek's phone number?
- The practice phone number listed in the NPPES registry for Stephen Kotarek is (916) 733-5090.
- Does Stephen Kotarek accept Medicare?
- Stephen Kotarek is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Kotarek's NPI active?
- Yes — Stephen Kotarek's NPI (1235371915) is active in the NPPES registry as of the last update on 2019-11-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.