Sanford Koyama, O.D.
NPI 1346233798 · Optometrist · Fountain Valley, CA
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sanford Koyama, O.D. is a Optometrist provider in Fountain Valley, CA (NPI 1346233798).
Provider details
- NPI number
- 1346233798
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- O.D.
- Sex
- Male
- Sole proprietor
- No
- License
- OPT4979TPA (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 tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-08-31
- Last updated
- 2010-07-13
Frequently asked questions
- What is Sanford Koyama's NPI number?
- Sanford Koyama's National Provider Identifier (NPI) is 1346233798, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sanford Koyama's specialty?
- Sanford Koyama is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Sanford Koyama located?
- Sanford Koyama's practice location on file with NPPES is 18430 Brookhurst St, Fountain Valley, CA 92708-6726.
- What is Sanford Koyama's phone number?
- The practice phone number listed in the NPPES registry for Sanford Koyama is (714) 968-9121.
- Does Sanford Koyama accept Medicare?
- Sanford Koyama is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sanford Koyama's NPI active?
- Yes — Sanford Koyama's NPI (1346233798) is active in the NPPES registry as of the last update on 2010-07-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.