Gary Siela, LMFT
NPI 1538375159 · Marriage & Family Therapist · Windsor, CA
Enrolled with Medicare as Practitioner - Marriage and Family Therapist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gary Siela, LMFT is a Marriage & Family Therapist provider in Windsor, CA (NPI 1538375159).
Provider details
- NPI number
- 1538375159
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Credential
- LMFT
- Sex
- Male
- Sole proprietor
- Yes
- License
- MFC47106 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
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
19 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)
- 27 E Napa StSuite ISonoma, CA 95476-6738Phone: (707) 980-9047
Registry dates
- Enumerated
- 2007-05-14
- Last updated
- 2022-02-11
Frequently asked questions
- What is Gary Siela's NPI number?
- Gary Siela's National Provider Identifier (NPI) is 1538375159, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gary Siela's specialty?
- Gary Siela is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Gary Siela located?
- Gary Siela's practice location on file with NPPES is 8911 Lakewood Dr Ste 24f, Windsor, CA 95492-7856.
- What is Gary Siela's phone number?
- The practice phone number listed in the NPPES registry for Gary Siela is (707) 836-6350.
- Does Gary Siela accept Medicare?
- Gary Siela is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gary Siela's NPI active?
- Yes — Gary Siela's NPI (1538375159) is active in the NPPES registry as of the last update on 2022-02-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.