Theresa Marie Gillis, PA-C
NPI 1306024476ActiveIndividual· Physician Assistant· Frederick, MD
Physician Assistant (PA-C) with Frederick Health Medical Group LLC, practicing in Frederick, Maryland. 584 Medicare patients in 2024, $82,130 paid; nearly all of their 1,176 Part D prescriptions were generic (92%). Sumitomo Pharma America, Inc. was the largest of 8 companies reporting payments in 2025, $701.77 in all, mostly food and beverage. Lists Frederick Health Hospital as a hospital affiliation.
Overview
| NPI | 1306024476 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA-C |
| Sole proprietor | No |
| NPI issued | Jan 31, 2008 |
| Last updated in NPPES | May 16, 2023 |
| Certified by provider | May 16, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | C0003401 | MD |
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 - Physician Assistant (MD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 584 |
|---|---|
| Services billed | 4,532 across 25 procedure codes |
| Paid by Medicare | $82,130 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,176 · 2,648 30-day fills |
|---|---|
| Patients | 439 |
| Total drug cost | $108,181 |
| Generic share | 92% of claims |
Education and affiliations
| Graduation year | 1997 |
|---|---|
| Medicare specialty | Physician Assistant |
| Telehealth | Offers telehealth |
Medical group
- Frederick Health Medical Group LLCBrunswick, MD · 199 clinicians
Hospital affiliation
- Frederick Health HospitalFrederick, MD
Industry payments (Open Payments)
- 2025$701.77 · 21 payments from 8 companies
- 2024$326.69 · 13 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Sumitomo Pharma America, Inc. | $269.23 | 9 |
| Immunitybio, Inc. | $178.83 | 2 |
| Endo USA, Inc. | $101.97 | 4 |
| Boston Scientific Corporation | $46.63 | 1 |
| Urogen Pharma, Inc. | $42.32 | 2 |
What the 2025 payments were for
- Food and Beverage$701.77 · 21 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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