Gregory Warren Oldham, M.D.
NPI 1205065646ActiveIndividual· Ophthalmology· West Chester, PA
Ophthalmology (M.D.) in West Chester, Pennsylvania, trained at Jefferson Medical College of Thomas Jefferson University (class of 2009). In 2024 Medicare paid $605,067 for 1,454 patients, and Part D covered 3,497 of their prescriptions, 67% of them generic. Alcon Vision LLC was the largest of 5 companies reporting payments in 2025, $636.88 in all, mostly food and beverage.
Overview
| NPI | 1205065646 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 7, 2009 |
| Last updated in NPPES | Oct 10, 2020 |
| Certified by provider | Oct 10, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | MD450544 | PA |
| Ophthalmology, Glaucoma Specialist | 207WX0009X | MD450544 | PA |
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 (PA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,454 |
|---|---|
| Services billed | 6,117 across 36 procedure codes |
| Paid by Medicare | $605,067 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,497 · 7,728 30-day fills |
|---|---|
| Patients | 860 |
| Total drug cost | $412,758 |
| Generic share | 67% of claims |
Education and affiliations
| Medical school | Jefferson Medical College of Thomas Jefferson University |
|---|---|
| Graduation year | 2009 |
| Medicare specialty | Ophthalmology |
Medical group
- Chester County Eye Care Assoc PCWest Chester, PA · 12 clinicians
Industry payments (Open Payments)
- 2025$636.88 · 17 payments from 5 companies
- 2024$400.96 · 18 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Alcon Vision LLC | $463.11 | 9 |
| Abbvie Inc. | $121.18 | 5 |
| Thea Pharma Inc. | $19.21 | 1 |
| Regeneron Healthcare Solutions, Inc. | $18.08 | 1 |
| Glaukos Corporation | $15.30 | 1 |
What the 2025 payments were for
- Food and Beverage$636.88 · 17 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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