Irving Weissman, M.D.
NPI 1003866351 · Ophthalmology Physician · Brighton, MA
Enrolled with Medicare as Practitioner - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Irving Weissman, M.D. is a Ophthalmology Physician provider in Brighton, MA (NPI 1003866351).
Provider details
- NPI number
- 1003866351
- Entity type
- Individual
- Primary specialty
- Ophthalmology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 30368 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 2 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Latanoprost | 54 | 27 |
| Timolol Maleate | 21 | — |
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
Registry dates
- Enumerated
- 2006-05-10
- Last updated
- 2010-06-28
Frequently asked questions
- What is Irving Weissman's NPI number?
- Irving Weissman's National Provider Identifier (NPI) is 1003866351, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Irving Weissman's specialty?
- Irving Weissman is listed in the NPPES registry with a primary specialty of Ophthalmology Physician (Allopathic & Osteopathic Physicians).
- Where is Irving Weissman located?
- Irving Weissman's practice location on file with NPPES is 280 Washington St, Brighton, MA 02135-3511.
- What is Irving Weissman's phone number?
- The practice phone number listed in the NPPES registry for Irving Weissman is (617) 787-5503.
- Does Irving Weissman accept Medicare?
- Irving Weissman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Irving Weissman's NPI active?
- Yes — Irving Weissman's NPI (1003866351) is active in the NPPES registry as of the last update on 2010-06-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.