Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Eugene D. Locken, DO

Individual provider Family Medicine Physician · NPI 1255466603

Dr. Eugene D. Locken, DO is a Family Medicine Physician in Rancho Cucamonga, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2007
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

See every abbreviation used in this directory →

Practice location Address checks out

10131 Concord Dr
Rancho Cucamonga, CA 91730
Phone: (805) 291-3229
Fax: (805) 733-2222
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 20A4208 (CA)

Record details

NPI number1255466603
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorYes
NPI enumeratedFebruary 23, 2007
Last updated in NPPESJune 8, 2023
Certification dateJune 8, 2023
Mailing address10131 Concord Drive, Rancho Cucamonga, CA 91730

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