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

Dr. Geoffrey P. Colby, MD, PHD

Individual provider Neurological Surgery Physician · NPI 1144373739

Dr. Geoffrey P. Colby, MD, PHD is a Neurosurgery in Los Angeles, California. Graduated from Columbia University College of Physicians and Surgeons in 2006, 20 years ago. Practices with The Regents of the University of California, a 45-clinician group, works from 4 locations, accepts Medicare assignment and offers telehealth. Licensed in Arizona and California.

Years since qualifying
20
Trained at
Columbia University College of Physicians and Surgeons
Licensed in
AZ, CA
In the registry since
2007
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

300 Medical Plz
Los Angeles, CA 90095-0001
Phone: (310) 825-5111
Fax: (310) 825-7245
Show map & directions

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

Additional practice locations (3)

  • 6567 E Carondelet Dr Ste 305, Tucson, AZ 85710-6160 — (520) 881-8400
  • 757 Westwood Plz, Los Angeles, CA 90095-0001 — (310) 301-6800
  • 27235 Tourney Rd Ste 2500, Valencia, CA 91355-5908 — (310) 825-5111

Specialties & licences

Neurological Surgery Physician (primary) Taxonomy 207T00000X · Licence A149100 (CA)
Neurological Surgery Physician Taxonomy 207T00000X · Licence 74356 (AZ)

Record details

NPI number1144373739
Entity typeIndividual (Type 1)
GenderMale
Credentials MD , PHD
Sole proprietorYes
NPI enumeratedJanuary 19, 2007
Last updated in NPPESJune 27, 2025
Certification dateJune 27, 2025

Medicare enrollment

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

Medicare specialtyNEUROSURGERY
Medical schoolCOLUMBIA UNIVERSITY COLLEGE OF PHYSICIANS AND SURGEONS
Graduated 2006 (20 years in practice)
Group practice The Regents Of The University Of California — 45 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 on file with Medicare

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