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

Dr. Gregory Anthony Fonzo, PHD

Individual provider Clinical Psychologist · NPI 1174858070

Dr. Gregory Anthony Fonzo, PHD is a Clinical Psychologist in San Francisco, California. Qualified in 2013, 13 years ago. Practices with The University of Texas at Austin, a 156-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
13
Licensed in
CA
In the registry since
2009
What do these letters mean?
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

870 Market St Ste 958
San Francisco, CA 94102-3099
Phone: (650) 394-6586
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Psychologist (primary) Taxonomy 103TC0700X · Licence PSY27812 (CA)

Record details

NPI number1174858070
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorYes
NPI enumeratedOctober 9, 2009
Last updated in NPPESJanuary 11, 2016

Medicare enrollment

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

Medicare specialtyCLINICAL PSYCHOLOGIST
Medical schoolOTHER
Graduated 2013 (13 years in practice)
Group practice The University Of Texas At Austin — 156 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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