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

Dr. Ralph Bernard Armstrong, DO

Individual provider Obstetrics & Gynecology Physician · NPI 1477526028

Dr. Ralph Bernard Armstrong, DO is an Obstetrics/Gynecology in Hollister, California. Qualified in 2001, 25 years ago. Practices as a sole proprietor and accepts Medicare assignment. Licensed in California.

Years since qualifying
25
Licensed in
CA
In the registry since
2006
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.

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Practice location Address checks out

931 Sunset Dr
Hollister, CA 95023-5602
Phone: (831) 635-0604
Fax: (831) 665-5750
Show map & directions

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

Specialties & licences

Obstetrics & Gynecology Physician (primary) Taxonomy 207V00000X · Licence 20A9256 (CA)

Record details

NPI number1477526028
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorYes
NPI enumeratedFebruary 13, 2006
Last updated in NPPESJuly 8, 2007
Mailing address931 Sunset Dr, Hollister, CA 95023-5602

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyOBSTETRICS/GYNECOLOGY
Medical schoolOTHER
Graduated 2001 (25 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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