Andrea Williamson, MFT
NPI 1568671881 · Marriage & Family Therapist · Sebastopol, CA
Andrea Williamson, MFT is a Marriage & Family Therapist provider in Sebastopol, CA (NPI 1568671881).
Provider details
- NPI number
- 1568671881
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Credential
- MFT
- Sex
- Female
- Sole proprietor
- Yes
- License
- MFC36335 (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
19 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
- 2007-05-22
- Last updated
- 2015-01-24
Frequently asked questions
- What is Andrea Williamson's NPI number?
- Andrea Williamson's National Provider Identifier (NPI) is 1568671881, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Andrea Williamson's specialty?
- Andrea Williamson is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Andrea Williamson located?
- Andrea Williamson's practice location on file with NPPES is 7772 Washington Ave, Sebastopol, CA 95472-3628.
- What is Andrea Williamson's phone number?
- The practice phone number listed in the NPPES registry for Andrea Williamson is (707) 824-1460.
- Is Andrea Williamson's NPI active?
- Yes — Andrea Williamson's NPI (1568671881) is active in the NPPES registry as of the last update on 2015-01-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.