David F. Chang, M.D.
NPI 1316966138ActiveIndividual· Ophthalmology· Los Altos, CA
Ophthalmology (M.D.) in Los Altos, California, trained at Harvard Medical School (class of 1980). In 2024 Medicare paid $757,852 for 980 patients, and Part D covered 539 of their prescriptions, 58% of them generic. Rxsight Inc was the largest of 7 companies reporting payments in 2025, $99,428 in all, mostly speaking and faculty fees.
Overview
| NPI | 1316966138 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jul 19, 2006 |
| Last updated in NPPES | May 5, 2015 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | G045581 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Ophthalmology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 980 |
|---|---|
| Services billed | 3,362 across 29 procedure codes |
| Paid by Medicare | $757,852 |
Part D prescriptions in 2024
| Prescriptions (claims) | 539 · 751 30-day fills |
|---|---|
| Patients | 211 |
| Total drug cost | $26,884 |
| Generic share | 58% of claims |
Education and affiliations
| Medical school | Harvard Medical School |
|---|---|
| Graduation year | 1980 |
| Medicare specialty | Ophthalmology |
Medical group
- David F Chang M D IncLos Altos, CA · 2 clinicians
Industry payments (Open Payments)
- 2025$99,428 · 31 payments from 7 companies
- 2024$11,617 · 19 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Rxsight Inc | $65,283 | 1 |
| Alcon Vision LLC | $19,215 | 14 |
| Alcon Research LLC | $14,626 | 6 |
| Johnson & Johnson Surgical Vision, Inc. | $139.93 | 5 |
| Surgical Specialties Corporation (US), Inc. (DBA Corza Medical) | $72.87 | 1 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$65,283 · 1 payment
- Consulting Fee$32,750 · 13 payments
- Food and Beverage$809.73 · 16 payments
- Travel and Lodging$584.73 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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