Vernissia Tam, MD
NPI 1528344116ActiveIndividual· Colon & Rectal Surgery· Frederick, MD
Colon & Rectal Surgery (MD) with Frederick Health Medical Group LLC, practicing in Frederick, Maryland. 157 Medicare patients in 2024, $59,369 paid; all of their 89 Part D prescriptions were generic. Stryker Corporation was the largest of 4 companies reporting payments in 2025, $165.95 in all, mostly food and beverage. Lists Frederick Health Hospital as a hospital affiliation.
Overview
| NPI | 1528344116 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Oct 26, 2011 |
| Last updated in NPPES | Apr 7, 2022 |
| Certified by provider | Apr 7, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Colon & Rectal Surgery Primary | 208C00000X | D0092081 | MD |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Colorectal Surgery (Proctology) (MD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 157 |
|---|---|
| Services billed | 367 across 56 procedure codes |
| Paid by Medicare | $59,369 |
Part D prescriptions in 2024
| Prescriptions (claims) | 89 · 91 30-day fills |
|---|---|
| Patients | 31 |
| Total drug cost | $344.49 |
| Generic share | 100% of claims |
Education and affiliations
| Graduation year | 2013 |
|---|---|
| Medicare specialty | Colorectal Surgery (Proctology) |
Medical group
- Frederick Health Medical Group LLCBrunswick, MD · 199 clinicians
Hospital affiliation
- Frederick Health HospitalFrederick, MD
Other facilities
- Frederick Health Home CareHome health agency · Frederick, MD
Industry payments (Open Payments)
- 2025$165.95 · 4 payments from 4 companies
- 2024$295.37 · 10 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Stryker Corporation | $54.59 | 1 |
| Supreme Orthopedic Systems, LLC | $47.46 | 1 |
| Intuitive Surgical, Inc. | $33.35 | 1 |
| Boston Scientific Corporation | $30.55 | 1 |
What the 2025 payments were for
- Food and Beverage$165.95 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records