Thomas Chao, O.D.
NPI 1801974860 · Optometrist · Brooklyn, NY
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas Chao, O.D. is a Optometrist provider in Brooklyn, NY (NPI 1801974860).
Provider details
- NPI number
- 1801974860
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- O.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 004983 (NY)
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 | 107 | 33 |
| Timolol Maleate | 26 | — |
| Brimonidine Tartrate | 21 | 11 |
| Tobramycin/Dexamethasonebrand: Tobramycin-Dexamethasone | 18 | 15 |
| Cyclosporinebrand: Restasis | 16 | — |
| Cyclosporinebrand: Restasis Multidose | 13 | — |
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
- 2006-11-01
- Last updated
- 2007-07-08
Frequently asked questions
- What is Thomas Chao's NPI number?
- Thomas Chao's National Provider Identifier (NPI) is 1801974860, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Chao's specialty?
- Thomas Chao is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Thomas Chao located?
- Thomas Chao's practice location on file with NPPES is 7801 4th Ave, Brooklyn, NY 11209-3701.
- What is Thomas Chao's phone number?
- The practice phone number listed in the NPPES registry for Thomas Chao is (718) 836-6661.
- Does Thomas Chao accept Medicare?
- Thomas Chao is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thomas Chao's NPI active?
- Yes — Thomas Chao's NPI (1801974860) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.