Masha Matvey Nakelchik, M.D.
NPI 1255346623ActiveIndividual· Internal Medicine· San Jose, CA
Internal Medicine (M.D.) with Hamilton Avenue Medical Group Inc, practicing in San Jose, California. Their prescriptions cost Medicare Part D more than their services did: $1,401,116 for 10,476 claims, against $176,314 paid for services in 2024. Iti, Inc. (D/B/A Intra-Cellular Therapies, Inc.) was the largest of 34 companies reporting payments in 2025, $4,347 in all, mostly food and beverage. Lists Good Samaritan Hospital and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1255346623 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 31, 2006 |
| Last updated in NPPES | Sep 15, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | A73689 | 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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 384 |
|---|---|
| Services billed | 1,901 across 34 procedure codes |
| Paid by Medicare | $176,314 |
Part D prescriptions in 2024
| Prescriptions (claims) | 10,476 · 24,846 30-day fills |
|---|---|
| Patients | 711 |
| Total drug cost | $1,401,116 |
| Generic share | 84% of claims |
Education and affiliations
| Graduation year | 1990 |
|---|---|
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Hamilton Avenue Medical Group IncSan Jose, CA · 3 clinicians
Hospital affiliations
- Good Samaritan HospitalSan Jose, CA
- Santa Clara Valley Medical CenterSan Jose, CA
- Stanford Health CareStanford, CA
Other facilities
- Centerwell Asian American Home HealthHome health agency · Alameda, CA
- Sequoia Home HealthHome health agency · Milpitas, CA
- South Bay Home Health Care, LLCHome health agency · San Jose, CA
- Truemed, IncHome health agency · South San Francisco, CA
Industry payments (Open Payments)
- 2025$4,347 · 222 payments from 34 companies
- 2024$4,181 · 188 payments from 33 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Iti, Inc. (D/B/A Intra-Cellular Therapies, Inc.) | $425.93 | 21 |
| Abbvie Inc. | $408.12 | 26 |
| Pfizer Inc. | $361.85 | 19 |
| Novo Nordisk Inc | $342.14 | 18 |
| Lilly USA, LLC | $321.12 | 16 |
What the 2025 payments were for
- Food and Beverage$4,347 · 222 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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