Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Gregory J Adamson, MD

Individual provider Orthopaedic Surgery Physician · NPI 1972590610

Dr. Gregory J Adamson, MD is a Sports Medicine in Pasadena, California. Graduated from University of Southern California Keck School of Medicine in 1981, 45 years ago. Practices with David B. Hammer, a 116-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
45
Trained at
University of Southern California Keck School of Medicine
Licensed in
CA
In the registry since
2005
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

800 S Raymond Ave
Pasadena, CA 91105-3229
Phone: (626) 795-8051
Fax: (626) 795-0356
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Sports Medicine (Orthopaedic Surgery) Physician (primary) Taxonomy 207XX0005X · Licence G58923 (CA)
Orthopaedic Surgery Physician Taxonomy 207X00000X · Licence G58923 (CA)

Record details

NPI number1972590610
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedSeptember 27, 2005
Last updated in NPPESMarch 4, 2024
Certification dateMarch 4, 2024
Mailing addressPo Box 90730, Pasadena, CA 91109-0730

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtySPORTS MEDICINE
Also practisesORTHOPEDIC SURGERY
Medical schoolUNIVERSITY OF SOUTHERN CALIFORNIA KECK SCHOOL OF MEDICINE
Graduated 1981 (45 years in practice)
Group practice David B. Hammer — 116 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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