Holly Gruwell Antonyan, N.P.
NPI 1144500398ActiveIndividual· Nurse Practitioner· Torrance, CA
Nurse Practitioner (N.P.) with Hillside Dermatology, practicing in Torrance, California. Their prescriptions cost Medicare Part D more than their services did: $179,379 for 338 claims, against $111,547 paid for services in 2024. Genzyme Corporation was the largest of 17 companies reporting payments in 2025, $2,435 in all, mostly food and beverage.
Overview
| NPI | 1144500398 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | N.P. |
| Sole proprietor | No |
| NPI issued | Aug 19, 2011 |
| Last updated in NPPES | Sep 29, 2024 |
| Certified by provider | Sep 29, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner Primary | 363L00000X | 21075 | 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 - Nurse Practitioner (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 288 |
|---|---|
| Services billed | 2,467 across 36 procedure codes |
| Paid by Medicare | $111,547 |
Part D prescriptions in 2024
| Prescriptions (claims) | 338 · 417 30-day fills |
|---|---|
| Patients | 160 |
| Total drug cost | $179,379 |
| Generic share | 92% of claims |
Education and affiliations
| Graduation year | 2011 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- Hillside DermatologyTorrance, CA · 3 clinicians
Industry payments (Open Payments)
- 2025$2,435 · 83 payments from 17 companies
- 2024$4,223 · 81 payments from 20 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Genzyme Corporation | $365.20 | 8 |
| Sun Pharmaceutical Industries Inc. | $350.93 | 6 |
| Arcutis Biotherapeutics, Inc. | $217.27 | 2 |
| Almirall LLC | $209.78 | 4 |
| Organon LLC | $202.96 | 2 |
What the 2025 payments were for
- Food and Beverage$2,323 · 81 payments
- Education$111.99 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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