Irving Louis Weissman, M.D.
Ophthalmology Physician · Brighton, MA
Irving Louis Weissman, M.D. is an ophthalmology physician with a practice address in Brighton, Massachusetts, and NPI 1003866351, issued on May 10, 2006. Check the license (Massachusetts 30368, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Irving Louis Weissman
- Credential
- M.D.
- Primary taxonomy
- Ophthalmology Physician 207W00000X
- License number
- 30368 MA
Self-reported in NPPES; status is on the state search - Practice location
- 280 Washington St, Brighton, MA 02135
- Phone
- (617) 787-5503
- Enumerated
- May 10, 2006
- Record last updated
- Jun 28, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (617) 787-1140
- Medicaid ID
- 0198862 MA
- Entity
- Type 1 · individual
8 nearest ophthalmology physician records → All 791 in Massachusetts → Look up another NPI →
Also registered at 280 Washington St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Irving Louis Weissman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 30368Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
94% fewer Medicare Part D claims than the average ophthalmology physician in 2024
89 Medicare Part D claims for 35 beneficiaries, against an average of 1,518 among the 16,459 providers of this specialty who prescribed in Part D.
Most prescribed
- Latanoprost54 claims
- Timolol Maleate21 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Irving Louis Weissman among 791 ophthalmology physician records in Massachusetts
Irving Louis Weissman, M.D. is one of 791 ophthalmology physician records with a practice address in Massachusetts. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 23% of them.
- NPI issued2006 · 23% of these records are older, 48% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileNo · 65% of these records are
- Record last updated2010 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207W00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Ophthalmology Physician providers in Massachusetts
There are 791 ophthalmology physician records in Massachusetts.
All 791 in Massachusetts → Every provider in Brighton → Ophthalmology Physician nationwide →
The 8 ophthalmology physician records with the nearest ZIP codes
- Amy Parminder, MDBrighton, MA 021351215923982
- Kajal Sangal, MDBrighton, MA 021351386205193
- Charles Barsam, M.D.Cambridge, MA 021381760470041
- Paul Barsam, M.D.Cambridge, MA 021381245206176
- Shilpa Desai, MDCambridge, MA 021381104112879
- Christina Grassi, M.D.Cambridge, MA 021381306228515
- Christopher Robinson, M.D.Cambridge, MA 021381427266584
- Kenneth Stampfer, MDCambridge, MA 021381134193501
Common questions
What is Irving Louis Weissman, M.D.'s NPI number?
Irving Louis Weissman, M.D.'s National Provider Identifier (NPI) is 1003866351, issued on May 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Irving Louis Weissman, M.D. located?
The NPPES record lists a practice address at 280 Washington St, Brighton, MA, 02135. Phone: (617) 787-5503. Providers update this record themselves, so call before visiting.
How can I verify Irving Louis Weissman, M.D.'s license?
NPPES lists Massachusetts license number 30368, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Irving Louis Weissman, M.D. prescribe under Medicare Part D?
In 2024, Irving Louis Weissman, M.D. had 89 Medicare Part D claims for 35 beneficiaries; the average among ophthalmology physician prescribers was 1,518. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.