John Chen, M.D.
NPI 1366627879 · Ophthalmology Physician · Boston, MA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Chen, M.D. is a Ophthalmology Physician provider in Boston, MA (NPI 1366627879).
Provider details
- NPI number
- 1366627879
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 233230 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
18 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 28 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 809 | 323 |
| Dorzolamide Hcl/Timolol Maleatbrand: Dorzolamide-Timolol | 632 | 223 |
| Prednisolone Acetate | 376 | 173 |
| Brimonidine Tartrate | 302 | 130 |
| Timolol Maleate | 185 | 63 |
| Polymyxin B Sulf/Trimethoprimbrand: Polymyxin B Sul-Trimethoprim | 119 | 95 |
| Dorzolamide/Timolol/Pfbrand: Dorzolamide-Timolol | 113 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$110 across 2 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
- 2008-01-02
- Last updated
- 2021-12-15
Frequently asked questions
- What is John Chen's NPI number?
- John Chen's National Provider Identifier (NPI) is 1366627879, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Chen's specialty?
- John Chen is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is John Chen located?
- John Chen's practice location on file with NPPES is 750 Washington St, Boston, MA 02111-1526.
- What is John Chen's phone number?
- The practice phone number listed in the NPPES registry for John Chen is (617) 636-4600.
- Does John Chen accept Medicare?
- John Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Chen's NPI active?
- Yes — John Chen's NPI (1366627879) is active in the NPPES registry as of the last update on 2021-12-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.