Mark Mayo, PSYD, CA LP 33599
NPI 1689109696 · Psychologist · San Francisco, CA
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Mayo, PSYD, CA LP 33599 is a Psychologist provider in San Francisco, CA (NPI 1689109696).
Provider details
- NPI number
- 1689109696
- Entity type
- Individual
- Primary specialty
- PsychologistBehavioral Health & Social Service Providers
- Credential
- PSYD, CA LP 33599
- Sex
- Male
- Sole proprietor
- No
- License
- 33599 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
9 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Additional practice locations (1)
- 447 Haight StSan Francisco, CA 94117-3505Phone: (415) 310-4047
Registry dates
- Enumerated
- 2017-04-27
- Last updated
- 2023-01-22
- Certified
- 2023-01-22
Frequently asked questions
- What is Mark Mayo's NPI number?
- Mark Mayo's National Provider Identifier (NPI) is 1689109696, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Mayo's specialty?
- Mark Mayo is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).
- Where is Mark Mayo located?
- Mark Mayo's practice location on file with NPPES is 8 Bernice St Unit 107, San Francisco, CA 94103-4349.
- What is Mark Mayo's phone number?
- The practice phone number listed in the NPPES registry for Mark Mayo is (415) 489-0211.
- Does Mark Mayo accept Medicare?
- Mark Mayo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Mayo's NPI active?
- Yes — Mark Mayo's NPI (1689109696) is active in the NPPES registry as of the last update on 2023-01-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.