David Seidner, LMFT
NPI 1912177353 · Marriage & Family Therapist · San Mateo, CA
David Seidner, LMFT is a Marriage & Family Therapist provider in San Mateo, CA (NPI 1912177353).
Provider details
- NPI number
- 1912177353
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Credential
- LMFT
- Sex
- Male
- Sole proprietor
- Yes
- License
- 42600 (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
18 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
- 2008-02-29
- Last updated
- 2026-02-09
- Certified
- 2026-02-09
Frequently asked questions
- What is David Seidner's NPI number?
- David Seidner's National Provider Identifier (NPI) is 1912177353, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is David Seidner's specialty?
- David Seidner is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is David Seidner located?
- David Seidner's practice location on file with NPPES is 1700 S Amphlett Blvd Ste 120, San Mateo, CA 94402-2711.
- What is David Seidner's phone number?
- The practice phone number listed in the NPPES registry for David Seidner is (650) 683-2101.
- Is David Seidner's NPI active?
- Yes — David Seidner's NPI (1912177353) is active in the NPPES registry as of the last update on 2026-02-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.