Douglas Olken, MD
NPI 1538217427 · Family Medicine Physician · Harbor City, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Douglas Olken, MD is a Family Medicine Physician provider in Harbor City, CA (NPI 1538217427).
Provider details
- NPI number
- 1538217427
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A61072 (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
19 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 · 90 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 505 | 172 |
| Levothyroxine Sodium | 235 | 82 |
| Lisinopril | 232 | 85 |
| Rosuvastatin Calcium | 209 | 75 |
| Simvastatin | 182 | 57 |
| Losartan Potassium | 181 | 63 |
| Omeprazole | 174 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-08
- Last updated
- 2021-12-02
Frequently asked questions
- What is Douglas Olken's NPI number?
- Douglas Olken's National Provider Identifier (NPI) is 1538217427, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Douglas Olken's specialty?
- Douglas Olken is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Douglas Olken located?
- Douglas Olken's practice location on file with NPPES is 25825 Vermont Ave, Harbor City, CA 90710-3518.
- What is Douglas Olken's phone number?
- The practice phone number listed in the NPPES registry for Douglas Olken is (310) 325-5111.
- Does Douglas Olken accept Medicare?
- Douglas Olken is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Douglas Olken's NPI active?
- Yes — Douglas Olken's NPI (1538217427) is active in the NPPES registry as of the last update on 2021-12-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.