Eugene Locken, D.O.
NPI 1255466603 · Family Medicine Physician · Rancho Cucamonga, CA
Eugene Locken, D.O. is a Family Medicine Physician provider in Rancho Cucamonga, CA (NPI 1255466603).
Provider details
- NPI number
- 1255466603
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 20A4208 (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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-02-23
- Last updated
- 2023-06-08
- Certified
- 2023-06-08
Frequently asked questions
- What is Eugene Locken's NPI number?
- Eugene Locken's National Provider Identifier (NPI) is 1255466603, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Eugene Locken's specialty?
- Eugene Locken is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Eugene Locken located?
- Eugene Locken's practice location on file with NPPES is 10131 Concord Drive, Rancho Cucamonga, CA 91730.
- What is Eugene Locken's phone number?
- The practice phone number listed in the NPPES registry for Eugene Locken is (805) 291-3229.
- Is Eugene Locken's NPI active?
- Yes — Eugene Locken's NPI (1255466603) is active in the NPPES registry as of the last update on 2023-06-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.