Catherine Tierney, CRNP
NPI 1699127936ActiveIndividual· Nurse Practitioner, Family· Gaithersburg, MD
Nurse Practitioner, Family (CRNP) with Medstar Medical Group II LLC and 1 other group, practicing in Gaithersburg, Maryland. In 2024 Medicare paid $31,266 for 255 patients, and Part D covered 161 of their prescriptions, 75% of them generic. Antares Pharma, Inc. was the largest of 3 companies reporting payments in 2025, $120.54 in all, mostly food and beverage. Lists Medstar Washington Hospital Center as a hospital affiliation.
Overview
| NPI | 1699127936 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | CRNP |
| Sole proprietor | No |
| NPI issued | Jul 11, 2016 |
| Last updated in NPPES | Sep 16, 2022 |
| Certified by provider | Sep 16, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Family Primary | 363LF0000X | R213930 | MD |
| Nurse Practitioner, Family | 363LF0000X | RN1023485 | DC |
| Nurse Practitioner, Family | 363LF0000X | 0024184998 | VA |
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 - Nurse Practitioner (DC); Practitioner - Nurse Practitioner (MD); Practitioner - Nurse Practitioner (PA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 255 |
|---|---|
| Services billed | 493 across 42 procedure codes |
| Paid by Medicare | $31,266 |
Part D prescriptions in 2024
| Prescriptions (claims) | 161 · 241 30-day fills |
|---|---|
| Patients | 118 |
| Total drug cost | $22,396 |
| Generic share | 75% of claims |
Education and affiliations
| Graduation year | 2016 |
|---|---|
| Medicare specialty | Nurse Practitioner |
| Telehealth | Offers telehealth |
Medical groups
- Medstar Medical Group II LLCWashington, DC · 3,767 clinicians
- Medstar Urgent Care LLCWheaton, MD · 300 clinicians
Hospital affiliation
- Medstar Washington Hospital CenterWashington, DC
Industry payments (Open Payments)
- 2025$120.54 · 4 payments from 3 companies
- 2024$27.93 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Antares Pharma, Inc. | $59.97 | 2 |
| Tolmar, Inc. | $34.89 | 1 |
| Zoll Services LLC (A/K/A Zoll Lifecor Corp) | $25.68 | 1 |
What the 2025 payments were for
- Food and Beverage$120.54 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 64 family nurse practitioners in Gaithersburg · All family nurse practitioners in Maryland