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

Dr. Ronald Lee Koretz, MD

Individual provider Internal Medicine Physician · NPI 1265465579

Dr. Ronald Lee Koretz, MD is an Internal Medicine Physician in Sylmar, California. Licensed in California. Registered with an NPI since 2006.

Licensed in
CA
In the registry since
2006
Specialties on file
2
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

14445 Olive View Dr Dept Medicine Olive View Ucla Medical Center
Sylmar, CA 91342
Phone: (818) 364-3205
Fax: (818) 364-4573
Show map & directions

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

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence A023109 (CA)
Internal Medicine Physician Taxonomy 207R00000X · Licence A023109 (CA)

Record details

NPI number1265465579
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJuly 9, 2006
Last updated in NPPESMarch 23, 2010

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