Mary Wing Sum Tam, MD
NPI 1053802454ActiveIndividual· Ophthalmology· Danbury, CT
Ophthalmology (MD) in Danbury, Connecticut, trained at Tufts University School of Medicine (class of 2018). Their prescriptions cost Medicare Part D more than their services did: $1,456,847 for 10,260 claims, against $13,583 paid for services in 2024. Abbvie Inc. was the largest of 15 companies reporting payments in 2025, $1,792 in all, mostly food and beverage.
Overview
| NPI | 1053802454 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 22, 2018 |
| Last updated in NPPES | Jul 23, 2025 |
| Certified by provider | Jul 23, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Ophthalmology Primary | 207W00000X | 80895 | CT |
| Ophthalmology | 207W00000X | T6053 | TX |
| Ophthalmology | 207W00000X | ME163116 | FL |
| Internal Medicine | 207R00000X | 275696 | MA |
| Ophthalmology | 207W00000X | 960492 | NY |
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 (CT); Practitioner - Ophthalmology (FL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 85 |
|---|---|
| Services billed | 171 across 23 procedure codes |
| Paid by Medicare | $13,583 |
Part D prescriptions in 2024
| Prescriptions (claims) | 10,260 · 14,383 30-day fills |
|---|---|
| Patients | 2,369 |
| Total drug cost | $1,456,847 |
| Generic share | 43% of claims |
Education and affiliations
| Medical school | Tufts University School of Medicine |
|---|---|
| Graduation year | 2018 |
| Medicare specialty | Ophthalmology |
Medical group
- Refocus Eye Health of Central Connecticut PCManchester, CT · 36 clinicians
Industry payments (Open Payments)
- 2025$1,792 · 50 payments from 15 companies
- 2024$1,421 · 41 payments from 10 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $605.50 | 20 |
| Alcon Vision LLC | $330.06 | 5 |
| Amgen Inc. | $217.66 | 7 |
| Tarsus Pharmaceuticals, Inc. | $146.04 | 3 |
| Organon LLC | $143.30 | 1 |
What the 2025 payments were for
- Food and Beverage$1,792 · 50 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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