Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Mark Ryan Mayo, PSYD, CALP33599

Individual provider Psychologist · NPI 1689109696

Dr. Mark Ryan Mayo, PSYD, CALP33599 is a Psychologist in San Francisco, California. Works from 2 locations. Licensed in California.

Licensed in
CA
In the registry since
2017
What do these letters mean?
PSYD — Doctor of Psychology
A doctoral psychologist trained primarily for clinical practice.

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Practice location Address checks out

8 Bernice St Unit 107
San Francisco, CA 94103-4349
Phone: (415) 489-0211
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 447 Haight St, San Francisco, CA 94117-3505 — (415) 310-4047

Specialties & licences

Psychologist (primary) Taxonomy 103T00000X · Licence 33599 (CA)

Record details

NPI number1689109696
Entity typeIndividual (Type 1)
GenderMale
Credentials PSYD , CALP33599
Sole proprietorNo
NPI enumeratedApril 27, 2017
Last updated in NPPESJanuary 22, 2023
Certification dateJanuary 22, 2023

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