Nonna Khachiyan, PA-C
NPI 1073677498ActiveIndividual· Physician Assistant· Fall River, MA
Physician Assistant (PA-C) with Tristan Medical Enterprises PC, practicing in Fall River, Massachusetts. Their prescriptions cost Medicare Part D more than their services did: $1,471,193 for 1,490 claims, against $85,303 paid for services in 2024. Abbvie Inc. was the largest of 21 companies reporting payments in 2025, $8,976 in all, mostly food and beverage.
Overview
| NPI | 1073677498 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA-C |
| Sole proprietor | No |
| NPI issued | Dec 20, 2006 |
| Last updated in NPPES | Mar 15, 2023 |
| Certified by provider | Mar 15, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | 2209 | MA |
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 (MA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 436 |
|---|---|
| Services billed | 1,403 across 43 procedure codes |
| Paid by Medicare | $85,303 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,490 · 1,637 30-day fills |
|---|---|
| Patients | 348 |
| Total drug cost | $1,471,193 |
| Generic share | 85% of claims |
Education and affiliations
| Graduation year | 2006 |
|---|---|
| Medicare specialty | Physician Assistant |
Medical group
- Tristan Medical Enterprises PCNorth Attleboro, MA · 5 clinicians
Industry payments (Open Payments)
- 2025$8,976 · 282 payments from 21 companies
- 2024$9,215 · 319 payments from 23 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $1,421 | 43 |
| Janssen Biotech, Inc. | $1,405 | 40 |
| Ucb, Inc. | $984.59 | 23 |
| E.R. Squibb & Sons, L.L.C. | $723.65 | 21 |
| Arcutis Biotherapeutics, Inc. | $722.48 | 28 |
What the 2025 payments were for
- Food and Beverage$8,782 · 280 payments
- Education$193.99 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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