Christopher Chan, O.D.
NPI 1821440322 · Optometrist · Oakland Gardens, NY
Christopher Chan, O.D. is a Optometrist provider in Oakland Gardens, NY (NPI 1821440322).
Provider details
- NPI number
- 1821440322
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- O.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 008489 (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
9 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
4 documented practice locations
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 · 1 distinct drug on file.
| Drug | Part D claims (2024) |
|---|---|
| Latanoprost | 12 |
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 no Part D record, 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
Additional practice locations (3)
- 13512 Roosevelt AveFlushing, NY 11354Phone: (718) 886-8637
- 79 Middleville RdNorthport, NY 11768-2200Phone: (631) 261-4400
- 511 Boston Post RdPort Chester, NY 10573Phone: (914) 937-3955Fax: (914) 937-0586
Registry dates
- Enumerated
- 2016-07-07
- Last updated
- 2025-07-01
- Certified
- 2025-07-01
Frequently asked questions
- What is Christopher Chan's NPI number?
- Christopher Chan's National Provider Identifier (NPI) is 1821440322, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Christopher Chan's specialty?
- Christopher Chan is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Christopher Chan located?
- Christopher Chan's practice location on file with NPPES is 21411 73rd Ave, Oakland Gardens, NY 11364-2947.
- What is Christopher Chan's phone number?
- The practice phone number listed in the NPPES registry for Christopher Chan is (718) 225-5533.
- Is Christopher Chan's NPI active?
- Yes — Christopher Chan's NPI (1821440322) is active in the NPPES registry as of the last update on 2025-07-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.