Quick answers
- Does Philip Ian R. Tiamzon accept Medicare assignment?
- Yes. Medicare's clinician data says Philip Ian R. Tiamzon accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- What is Philip Ian R. Tiamzon's NPI number?
- 1720669310. 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 Philip Ian R. Tiamzon is enrolled with Medicare (CMS data updated October 2, 2026).
- 34806 Yucaipa BlvdYucaipa, CA 92399 (909) 787‑0134
Group practices
Medicare enrollment lists Philip Ian R. Tiamzon as a member of this group (CMS data updated October 2, 2026).
- California Optometric Center2 clinicians in the group
Specialties
- Optometryprimary
Other optometrists in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Other clinicians in California Optometric Center
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | OD |
|---|---|
| Optometry school | Southern California College Of Optometry |
| Graduation year | 2022 (4 years since optometry school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1720669310 |
| 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 October 2, 2026, retrieved October 29, 2026
- 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