Michael A. Chang, M.D.
NPI 1366438624ActiveIndividual· Ophthalmology· Lexington, MA
Ophthalmology (M.D.) in Lexington, Massachusetts, trained at Harvard Medical School (class of 1984). Their prescriptions cost Medicare Part D more than their services did: $364,790 for 2,265 claims, against $107,167 paid for services in 2024.
Overview
| NPI | 1366438624 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Sep 22, 2005 |
| Last updated in NPPES | Aug 14, 2023 |
| Certified by provider | Aug 14, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | 59606 | MA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Ophthalmology (MA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 578 |
|---|---|
| Services billed | 1,742 across 27 procedure codes |
| Paid by Medicare | $107,167 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,265 · 4,089 30-day fills |
|---|---|
| Patients | 611 |
| Total drug cost | $364,790 |
| Generic share | 69% of claims |
Education and affiliations
| Medical school | Harvard Medical School |
|---|---|
| Graduation year | 1984 |
| Medicare specialty | Ophthalmology |
Medical group
- Massachusetts Eye and Ear Associates, IncBoston, MA · 433 clinicians
Hospital affiliation
- Massachusetts Eye and Ear Infirmary -Boston, MA
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 26 ophthalmologists in Lexington · All ophthalmologists in Massachusetts