Mark Kim Walsh, M.D.,PHD
NPI 1003952318ActiveIndividual· Ophthalmology, Retina Specialist· Tucson, AZ
Ophthalmology, Retina Specialist (M.D.,PHD) in Tucson, Arizona, trained at Washington University School of Medicine (class of 2003). In 2024 Medicare paid $4,934,739 for 1,426 patients, and Part D covered 811 of their prescriptions, 56% of them generic. Mallinckrodt Hospital Products Inc. was the largest of 9 companies reporting payments in 2025, $551.28 in all, mostly food and beverage.
Overview
| NPI | 1003952318 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D.,PHD |
| Sole proprietor | No |
| NPI issued | Jan 30, 2007 |
| Last updated in NPPES | Apr 5, 2017 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology, Retina Specialist Primary | 207WX0107X | 41270 | AZ |
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 (AZ) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,426 |
|---|---|
| Services billed | 87,495 across 57 procedure codes |
| Paid by Medicare | $4,934,739 |
Part D prescriptions in 2024
| Prescriptions (claims) | 811 · 1,196 30-day fills |
|---|---|
| Patients | 263 |
| Total drug cost | $92,196 |
| Generic share | 56% of claims |
Education and affiliations
| Medical school | Washington University School of Medicine |
|---|---|
| Graduation year | 2003 |
| Medicare specialty | Ophthalmology |
Medical group
- Rasw, PCGreen Valley, AZ · 8 clinicians
Industry payments (Open Payments)
- 2025$551.28 · 13 payments from 9 companies
- 2024$956.01 · 11 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Mallinckrodt Hospital Products Inc. | $145.81 | 1 |
| Alcon Vision LLC | $113.25 | 1 |
| Regeneron Healthcare Solutions, Inc. | $76.74 | 2 |
| Abbvie Inc. | $61.41 | 3 |
| Astellas Pharma US Inc | $57.73 | 2 |
What the 2025 payments were for
- Food and Beverage$551.28 · 13 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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