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

Dr. Gregory J. Withers, MD

Individual provider Neurological Surgery Physician · NPI 1700804382

Dr. Gregory J. Withers, MD is a Neurosurgery in Arcadia, California. Graduated from University of California, Geffen School of Medicine in 1973, 53 years ago. Practices with USC Care Medical Group Inc, a 1,371-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
53
Trained at
University of California, Geffen School of Medicine
Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Practice location Address checks out

301 W Huntington Dr Ste 407
Arcadia, CA 91007-1504
Phone: (626) 821-3440
Fax: (626) 821-0709
Show map & directions

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

Specialties & licences

Neurological Surgery Physician (primary) Taxonomy 207T00000X · Licence G27800 (CA)

Record details

NPI number1700804382
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJuly 18, 2006
Last updated in NPPESApril 16, 2008
Mailing address301 W Huntington Dr, Suite 407, Arcadia, CA 91007-1504

Medicare enrollment

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

Medicare specialtyNEUROSURGERY
Medical schoolUNIVERSITY OF CALIFORNIA, GEFFEN SCHOOL OF MEDICINE
Graduated 1973 (53 years in practice)
Group practice Usc Care Medical Group Inc — 1371 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare

Other providers in Arcadia