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

Mr. Ron Y Gu, MD

Individual provider Internal Medicine Physician · NPI 1851494215

Mr. Ron Y Gu, MD is an Internal Medicine in Hacienda Heights, California. Graduated from National Medical University in 1968, 58 years ago. Practices with Colima Medical Clinic PC, a 5-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
58
Trained at
National Medical University
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

1850 S Azusa Ave Ste 205
Hacienda Heights, CA 91745
Phone: (626) 964-2880
Fax: (626) 964-2834
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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 A37924 (CA)

Record details

NPI number1851494215
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 7, 2006
Last updated in NPPESJuly 8, 2007

Medicare enrollment

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

Medicare specialtyINTERNAL MEDICINE
Medical schoolNATIONAL MEDICAL UNIVERSITY
Graduated 1968 (58 years in practice)
Group practice Colima Medical Clinic Pc — 5 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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