Adam Garretson Rock, M.D.
NPI 1477907715ActiveIndividual· Internal Medicine, Medical Oncology· Duarte, CA
Internal Medicine, Medical Oncology (M.D.) with City of Hope Medical Foundation, practicing in Duarte, California. Their prescriptions cost Medicare Part D more than their services did: $4,471,592 for 722 claims, against $79,801 paid for services in 2024. Intuitive Surgical, Inc. was the largest of 5 companies reporting payments in 2025, $1,797 in all, mostly speaking and faculty fees.
Overview
| NPI | 1477907715 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Apr 22, 2016 |
| Last updated in NPPES | Jul 6, 2022 |
| Certified by provider | Jul 6, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Medical Oncology Primary | 207RX0202X | A162794 | 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 - Medical Oncology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 251 |
|---|---|
| Services billed | 1,083 across 13 procedure codes |
| Paid by Medicare | $79,801 |
Part D prescriptions in 2024
| Prescriptions (claims) | 722 · 818 30-day fills |
|---|---|
| Patients | 127 |
| Total drug cost | $4,471,592 |
| Generic share | 58% of claims |
Education and affiliations
| Graduation year | 2016 |
|---|---|
| Medicare specialty | Medical Oncology |
| Telehealth | Offers telehealth |
Medical group
- City of Hope Medical FoundationDuarte, CA · 982 clinicians
Industry payments (Open Payments)
- 2025$1,797 · 6 payments from 5 companies
- 2024$347.27 · 6 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Intuitive Surgical, Inc. | $1,500 | 1 |
| Janssen Biotech, Inc. | $116.75 | 1 |
| Novocure Inc. | $104.22 | 1 |
| Deciphera Pharmaceuticals Inc. | $54.17 | 2 |
| Amgen Inc. | $21.47 | 1 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$1,500 · 1 payment
- Food and Beverage$296.61 · 5 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 50 medical oncologists in Duarte · All medical oncologists in California