Ari Umutyan, M.D.
NPI 1275516171ActiveIndividual· Internal Medicine, Medical Oncology· San Francisco, CA
Internal Medicine, Medical Oncology (M.D.) in San Francisco, California, trained at University of Southern California Keck School of Medicine (class of 2000). Their prescriptions cost Medicare Part D more than their services did: $3,407,532 for 952 claims, against $145,918 paid for services in 2024. Novartis Pharmaceuticals Corporation was the largest of 23 companies reporting payments in 2025, $1,896 in all, mostly food and beverage.
Overview
| NPI | 1275516171 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Nov 23, 2005 |
| Last updated in NPPES | Oct 15, 2026 |
| Certified by provider | Oct 15, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Medical Oncology Primary | 207RX0202X | A76240 | CA |
| Internal Medicine, Hematology & Oncology | 207RH0003X | A76240 | CA |
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 - Hematology/Oncology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 445 |
|---|---|
| Services billed | 1,617 across 23 procedure codes |
| Paid by Medicare | $145,918 |
Part D prescriptions in 2024
| Prescriptions (claims) | 952 · 1,367 30-day fills |
|---|---|
| Patients | 187 |
| Total drug cost | $3,407,532 |
| Generic share | 62% of claims |
Education and affiliations
| Medical school | University of Southern California Keck School of Medicine |
|---|---|
| Graduation year | 2000 |
| Medicare specialty | Hematology/Oncology |
| Telehealth | Offers telehealth |
Medical groups
- Adventist Health Physicians NetworkSaint Helena, CA · 628 clinicians
- St. Helena HospitalSaint Helena, CA · 84 clinicians
Hospital affiliations
- Adventist Health ClearlakeClearlake, CA
- Adventist Health St HelenaSaint Helena, CA
- Adventist Health Ukiah ValleyUkiah, CA
- Providence Queen of the Valley Medical CenterNapa, CA
- Sonoma Valley HospitalSonoma, CA
Other facilities
- Providence at Home With Compassus Home Health, Napa ValleyHome health agency · Napa, CA
Industry payments (Open Payments)
- 2025$1,896 · 51 payments from 23 companies
- 2024$1,698 · 67 payments from 17 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novartis Pharmaceuticals Corporation | $730.28 | 11 |
| Astrazeneca Pharmaceuticals LP | $228.10 | 5 |
| Janssen Biotech, Inc. | $144.59 | 5 |
| Celgene Corporation | $113.57 | 5 |
| Daiichi Sankyo Inc. | $74.91 | 3 |
What the 2025 payments were for
- Food and Beverage$1,298 · 45 payments
- Long term medical supply or device loan$598.20 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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