Liana Tatarian, DO
NPI 1043717044ActiveIndividual· Internal Medicine· Valhalla, NY
Internal Medicine (DO) with Westchester Medical Center Advanced Physician Services PC and 1 other group, practicing in Valhalla, New York. Mostly services rather than prescriptions: Medicare paid $49,232 for 221 patients in 2024, with only 33 Part D claims. Pfizer Inc. was the largest of 2 companies reporting payments in 2025, $191.82 in all, mostly food and beverage. Lists Norwalk Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1043717044 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | Apr 7, 2018 |
| Last updated in NPPES | Jan 2, 2024 |
| Certified by provider | Jan 2, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 309065 | NY |
| Internal Medicine | 207R00000X | 76523 | CT |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | NY |
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 - Internal Medicine (CT); Practitioner - Internal Medicine (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 221 |
|---|---|
| Services billed | 664 across 8 procedure codes |
| Paid by Medicare | $49,232 |
Part D prescriptions in 2024
| Prescriptions (claims) | 33 · 35 30-day fills |
|---|---|
| Patients | 14 |
| Total drug cost | $664.28 |
| Generic share | 85% of claims |
Education and affiliations
| Graduation year | 2018 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical groups
- Westchester Medical Center Advanced Physician Services PCValhalla, NY · 897 clinicians
- Nuvance Health Medical Practice CT IncDanbury, CT · 747 clinicians
Hospital affiliations
- Norwalk HospitalNorwalk, CT
- Westchester Medical CenterValhalla, NY
Industry payments (Open Payments)
- 2025$191.82 · 9 payments from 2 companies
- 2024$295.07 · 14 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $167.04 | 8 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $24.78 | 1 |
What the 2025 payments were for
- Food and Beverage$191.82 · 9 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 69 internal medicine physicians in Valhalla · All internal medicine physicians in New York