Ronak Patel, M.D.
NPI 1255872602ActiveIndividual· Internal Medicine, Hematology & Oncology· Walnut Creek, CA
Internal Medicine, Hematology & Oncology (M.D.) in Walnut Creek, California, trained at University of Miami, Lm Miller School of Medicine (class of 2017). Their prescriptions cost Medicare Part D more than their services did: $762,795 for 375 claims, against $411,782 paid for services in 2024. Merck Sharp & Dohme LLC was the largest of 24 companies reporting payments in 2025, $1,012 in all, mostly food and beverage.
Overview
| NPI | 1255872602 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Mar 18, 2017 |
| Last updated in NPPES | Nov 25, 2025 |
| Certified by provider | Nov 25, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | A157379 | 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 | 755 |
|---|---|
| Services billed | 16,274 across 100 procedure codes |
| Paid by Medicare | $411,782 |
Part D prescriptions in 2024
| Prescriptions (claims) | 375 · 640 30-day fills |
|---|---|
| Patients | 152 |
| Total drug cost | $762,795 |
| Generic share | 70% of claims |
Education and affiliations
| Medical school | University of Miami, Lm Miller School of Medicine |
|---|---|
| Graduation year | 2017 |
| Medicare specialty | Hematology/Oncology |
| Telehealth | Offers telehealth |
Medical group
- John Muir Physician NetworkPleasant Hill, CA · 494 clinicians
Hospital affiliations
- John Muir Medical Center - Concord CampusConcord, CA
- John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA
- San Ramon Regional Medical CenterSan Ramon, CA
Other facilities
- Prohealth Home Care, IncHospice · San Jose, CA
- Prohealth Home Care, IncHospice · Walnut Creek, CA
- Prohealth Home Care, IncHospice · Stockton, CA
- Prohealth Home Care, Inc.Hospice · Sacramento, CA
Industry payments (Open Payments)
- 2025$1,012 · 42 payments from 24 companies
- 2024$1,316 · 23 payments from 14 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merck Sharp & Dohme LLC | $128.01 | 5 |
| Novartis Pharmaceuticals Corporation | $109.91 | 4 |
| Astrazeneca Pharmaceuticals LP | $86.46 | 3 |
| Servier Pharmaceuticals LLC | $63.57 | 2 |
| Abbvie Inc. | $60.13 | 3 |
What the 2025 payments were for
- Food and Beverage$1,012 · 42 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 24 hematologist-oncologists in Walnut Creek · All hematologist-oncologists in California