Mark Keller, MFT
NPI 1811257884 · Marriage & Family Therapist · San Francisco, CA
Mark Keller, MFT is a Marriage & Family Therapist provider in San Francisco, CA (NPI 1811257884).
Provider details
- NPI number
- 1811257884
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Credential
- MFT
- Sex
- Male
- Sole proprietor
- Yes
- License
- MFC47750 (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
14 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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
Registry dates
- Enumerated
- 2012-05-23
- Last updated
- 2026-01-09
- Certified
- 2026-01-09
Frequently asked questions
- What is Mark Keller's NPI number?
- Mark Keller's National Provider Identifier (NPI) is 1811257884, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Keller's specialty?
- Mark Keller is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Mark Keller located?
- Mark Keller's practice location on file with NPPES is 211 Gough St, San Francisco, CA 94102-5946.
- What is Mark Keller's phone number?
- The practice phone number listed in the NPPES registry for Mark Keller is (415) 894-5759.
- Is Mark Keller's NPI active?
- Yes — Mark Keller's NPI (1811257884) is active in the NPPES registry as of the last update on 2026-01-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.