Quick answers
- Which hospitals does Gregory J. Adamson work at?
- Medicare's official clinician data lists Gregory J. Adamson at 3 hospitals: Casa Colina Hospital, Glendale Adventist Medical Center and Huntington Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gregory J. Adamson see patients?
- Medicare's clinician data lists 3 practice locations, including Templeton, CA, Arcadia, CA and Pasadena, CA. Call before your visit to confirm the address.
- What is Gregory J. Adamson's specialty?
- Medicare lists Sports Medicine as the primary specialty, and also Orthopedic Surgery.
- Does Gregory J. Adamson accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory J. Adamson accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Gregory J. Adamson?
- (626) 979-2002, as listed in official Medicare / NPI Registry data.
- What is Gregory J. Adamson's NPI number?
- 1972590610. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Gregory J. Adamson works
Medicare's Facility Affiliation Data lists Gregory J. Adamson at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Casa Colina HospitalPomona, CA · Acute Care Hospital · CCN 050782
- Glendale Adventist Medical CenterGlendale, CA · Acute Care Hospital · CCN 050239
- Huntington HospitalPasadena, CA · Acute Care Hospital · CCN 050438
Practice locations
Addresses where Gregory J. Adamson is enrolled with Medicare (CMS data updated 2026-10-02).
- 1051 Las Tablas RdTempleton, CA 93465
- 289 W Huntington Dr, Suite 304Arcadia, CA 91007 (626) 979‑2002
- 800 S Raymond AvePasadena, CA 91105 (626) 795‑8051
Group practices
Medicare enrollment lists Gregory J. Adamson as a member of these groups (CMS data updated 2026-10-02).
- Cedars-Sinai Medical Care Foundation1,692 clinicians in the group
- David B. Hammer123 clinicians in the group
Specialties
- Sports Medicineprimary
- Orthopedic Surgeryalso
Other sports medicine doctors in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Southern California Keck School Of Medicine |
| Graduation year | 1981 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1972590610 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians