Mark McAllister, MD
NPI 1669934394ActiveIndividual· Ophthalmology, Retina Specialist· Sacramento, CA
Ophthalmology, Retina Specialist (MD) in Sacramento, California, trained at University of Texas Medical School at Houston (class of 2019). Their prescriptions cost Medicare Part D more than their services did: $27,873 for 157 claims, against $5,145 paid for services in 2024. Alcon Vision LLC was the largest of 6 companies reporting payments in 2025, $800.53 in all, mostly food and beverage.
Overview
| NPI | 1669934394 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 2, 2019 |
| Last updated in NPPES | Jan 9, 2026 |
| Certified by provider | Jan 9, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology, Retina Specialist Primary | 207WX0107X | A196061 | 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); Practitioner - Ophthalmology (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 41 |
|---|---|
| Services billed | 80 across 28 procedure codes |
| Paid by Medicare | $5,145 |
Part D prescriptions in 2024
| Prescriptions (claims) | 157 · 235 30-day fills |
|---|---|
| Patients | 73 |
| Total drug cost | $27,873 |
| Generic share | 69% of claims |
Education and affiliations
| Medical school | University of Texas Medical School at Houston |
|---|---|
| Graduation year | 2019 |
| Medicare specialty | Ophthalmology |
Medical group
- Vitreo-Retinal Medical Group, Inc.Sacramento, CA · 22 clinicians
Hospital affiliation
- Mercy General HospitalSacramento, CA
Industry payments (Open Payments)
- 2025$800.53 · 12 payments from 6 companies
- 2024$360.37 · 5 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Alcon Vision LLC | $264.17 | 2 |
| Astellas Pharma US Inc | $244.37 | 4 |
| Genentech USA, Inc. | $179.68 | 2 |
| Regeneron Healthcare Solutions, Inc. | $52.98 | 2 |
| Apellis Pharmaceuticals, Inc. | $33.90 | 1 |
What the 2025 payments were for
- Food and Beverage$800.53 · 12 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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