David Bruce Mark, M.D.
NPI 1912900218ActiveIndividual· Ophthalmology· Sunnyvale, CA
Ophthalmology (M.D.) in Sunnyvale, California, trained at Stanford University School of Medicine (class of 1976). In 2024 Medicare paid $69,862 for 400 patients, and Part D covered 456 of their prescriptions, 51% of them generic. Alcon Vision LLC reported $20.09 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1912900218 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 31, 2005 |
| Last updated in NPPES | Jan 31, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | G35305 | 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 | 400 |
|---|---|
| Services billed | 1,325 across 33 procedure codes |
| Paid by Medicare | $69,862 |
Part D prescriptions in 2024
| Prescriptions (claims) | 456 · 945 30-day fills |
|---|---|
| Patients | 129 |
| Total drug cost | $29,771 |
| Generic share | 51% of claims |
Education and affiliations
| Medical school | Stanford University School of Medicine |
|---|---|
| Graduation year | 1976 |
| Medicare specialty | Ophthalmology |
Medical group
- Mendelson and Mark Optometric CorporationSunnyvale, CA · 8 clinicians
Industry payments (Open Payments)
- 2025$20.09 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Alcon Vision LLC | $20.09 | 1 |
What the 2025 payments were for
- Food and Beverage$20.09 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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