Derrick Olzack, P.A.
NPI 1114456738 · Family Medicine Physician · Atwater, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Derrick Olzack, P.A. is a Family Medicine Physician provider in Atwater, CA (NPI 1114456738).
Provider details
- NPI number
- 1114456738
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- P.A.
- Sex
- Male
- Sole proprietor
- No
- License
- 54432 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
9 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 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 38 | 16 |
| Metformin Hcl | 23 | — |
| Amlodipine Besylate | 18 | — |
| Simvastatin | 17 | — |
| Lisinopril | 16 | — |
| Omeprazole | 15 | — |
| Dulaglutidebrand: Trulicity | 15 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2017-06-07
- Last updated
- 2022-07-21
Frequently asked questions
- What is Derrick Olzack's NPI number?
- Derrick Olzack's National Provider Identifier (NPI) is 1114456738, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Derrick Olzack's specialty?
- Derrick Olzack is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Derrick Olzack located?
- Derrick Olzack's practice location on file with NPPES is 1775 Third St, Atwater, CA 95301-3608.
- What is Derrick Olzack's phone number?
- The practice phone number listed in the NPPES registry for Derrick Olzack is (209) 358-5611.
- Does Derrick Olzack accept Medicare?
- Derrick Olzack is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Derrick Olzack's NPI active?
- Yes — Derrick Olzack's NPI (1114456738) is active in the NPPES registry as of the last update on 2022-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.