Nicholas Chan, OD
NPI 1407870074 · Optometrist · San Mateo, CA
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nicholas Chan, OD is a Optometrist provider in San Mateo, CA (NPI 1407870074).
Provider details
- NPI number
- 1407870074
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- OD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 11614 (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
19 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 249 | 108 |
| Timolol Maleate | 94 | 40 |
| Brimonidine Tartrate | 68 | 28 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 30 | 11 |
| Dorzolamide Hcl | 21 | — |
| Azelastine Hcl | 19 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means , never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-27
- Last updated
- 2012-04-02
Frequently asked questions
- What is Nicholas Chan's NPI number?
- Nicholas Chan's National Provider Identifier (NPI) is 1407870074, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nicholas Chan's specialty?
- Nicholas Chan is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Nicholas Chan located?
- Nicholas Chan's practice location on file with NPPES is 228 E 3rd Ave, San Mateo, CA 94401-4015.
- What is Nicholas Chan's phone number?
- The practice phone number listed in the NPPES registry for Nicholas Chan is (415) 713-0674.
- Does Nicholas Chan accept Medicare?
- Nicholas Chan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nicholas Chan's NPI active?
- Yes — Nicholas Chan's NPI (1407870074) is active in the NPPES registry as of the last update on 2012-04-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.