Gregory J. Adamson, M.D.
NPI 1972590610ActiveIndividual· Orthopaedic Surgery, Sports Medicine· Pasadena, CA
Orthopaedic Surgery, Sports Medicine (M.D.) in Pasadena, California, trained at University of Southern California Keck School of Medicine (class of 1981). 330 Medicare patients in 2024, $100,982 paid; all of their 73 Part D prescriptions were generic. Abbott Laboratories reported $75.58 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1972590610 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Sep 27, 2005 |
| Last updated in NPPES | Mar 4, 2024 |
| Certified by provider | Mar 4, 2024 |
| Reactivated | Apr 6, 2006 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Orthopaedic Surgery, Sports Medicine Primary | 207XX0005X | G58923 | CA |
| Orthopaedic Surgery | 207X00000X | G58923 | 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 - Sports Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 330 |
|---|---|
| Services billed | 1,388 across 53 procedure codes |
| Paid by Medicare | $100,982 |
Part D prescriptions in 2024
| Prescriptions (claims) | 73 · 74 30-day fills |
|---|---|
| Patients | 47 |
| Total drug cost | $623.02 |
| Generic share | 100% of claims |
Education and affiliations
| Medical school | University of Southern California Keck School of Medicine |
|---|---|
| Graduation year | 1981 |
| Medicare specialty | Sports Medicine |
| Secondary specialties | Orthopedic Surgery |
Medical groups
- Cedars-Sinai Medical Care FoundationWest Hollywood, CA · 1,692 clinicians
- David B. HammerTempleton, CA · 123 clinicians
Hospital affiliations
- Casa Colina HospitalPomona, CA
- Glendale Adventist Medical CenterGlendale, CA
- Huntington HospitalPasadena, CA
Industry payments (Open Payments)
- 2025$75.58 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbott Laboratories | $75.58 | 1 |
What the 2025 payments were for
- Food and Beverage$75.58 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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