Quick answers
- Where does Ron Y. Gu see patients?
- Medicare's clinician data lists 1 practice location in Hacienda Heights, CA. Call before your visit to confirm the address.
- What is Ron Y. Gu's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Ron Y. Gu accept Medicare assignment?
- Yes. Medicare's clinician data says Ron Y. Gu accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Ron Y. Gu?
- (626) 964-2880, as listed in official Medicare / NPI Registry data.
- What is Ron Y. Gu's NPI number?
- 1851494215. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Ron Y. Gu is enrolled with Medicare (CMS data updated 2026-10-02).
- 1850 S Azusa Ave, Suite 205Hacienda Heights, CA 91745 (626) 964‑2880
Group practices
Medicare enrollment lists Ron Y. Gu as a member of this group (CMS data updated 2026-10-02).
- Colima Medical Clinic PC5 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Hacienda Heights
Clinicians with the same Medicare primary specialty in Hacienda Heights, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | National Medical University |
| Graduation year | 1968 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1851494215 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians