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

Ronald P Olah, MD

Individual provider Internal Medicine Physician · NPI 1881668341

Ronald P Olah, MD is an Internal Medicine in Pasadena, California. Graduated from University of Southern California Keck School of Medicine in 1985, 41 years ago. Practices with The Huntington Medical Foundation, a 57-clinician group, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
41
Trained at
University of Southern California Keck School of Medicine
Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

10 Congress St Ste 208
Pasadena, CA 91105-3023
Phone: (626) 792-2166
Fax: (626) 795-0740
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence G58723 (CA)

Record details

NPI number1881668341
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 13, 2006
Last updated in NPPESJanuary 26, 2012
Mailing address133 N Altadena Dr, 2nd Floor, Pasadena, CA 91107-7325

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolUNIVERSITY OF SOUTHERN CALIFORNIA KECK SCHOOL OF MEDICINE
Graduated 1985 (41 years in practice)
Group practice The Huntington Medical Foundation — 57 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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