Philip Ian Tiamzon, OD
NPI 1720669310 · Optometrist · Yucaipa, CA
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Philip Ian Tiamzon, OD is a Optometrist provider in Yucaipa, CA (NPI 1720669310).
Provider details
- NPI number
- 1720669310
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- OD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 35189 (CA)
Specialties & taxonomies
Eye and Vision Services Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
5 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$458 across 14 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2021-04-15
- Last updated
- 2023-08-08
- Certified
- 2023-08-08
Frequently asked questions
- What is Philip Ian Tiamzon's NPI number?
- Philip Ian Tiamzon's National Provider Identifier (NPI) is 1720669310, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Philip Ian Tiamzon's specialty?
- Philip Ian Tiamzon is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Philip Ian Tiamzon located?
- Philip Ian Tiamzon's practice location on file with NPPES is 34806 Yucaipa Blvd, Yucaipa, CA 92399-4235.
- What is Philip Ian Tiamzon's phone number?
- The practice phone number listed in the NPPES registry for Philip Ian Tiamzon is (909) 797-0134.
- Does Philip Ian Tiamzon accept Medicare?
- Philip Ian Tiamzon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Philip Ian Tiamzon's NPI active?
- Yes — Philip Ian Tiamzon's NPI (1720669310) is active in the NPPES registry as of the last update on 2023-08-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.