Deborah Williamson
NPI 1386780047 · Marriage & Family Therapist · Vacaville, CA
Deborah Williamson is a Marriage & Family Therapist provider in Vacaville, CA (NPI 1386780047).
Provider details
- NPI number
- 1386780047
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Sex
- Female
- Sole proprietor
- Yes
- License
- MFC28328 (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
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
- 2007-01-30
- Last updated
- 2007-07-08
Frequently asked questions
- What is Deborah Williamson's NPI number?
- Deborah Williamson's National Provider Identifier (NPI) is 1386780047, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Deborah Williamson's specialty?
- Deborah Williamson is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Deborah Williamson located?
- Deborah Williamson's practice location on file with NPPES is 419 Mason St, Vacaville, CA 95688-4546.
- What is Deborah Williamson's phone number?
- The practice phone number listed in the NPPES registry for Deborah Williamson is (707) 452-9244.
- Is Deborah Williamson's NPI active?
- Yes — Deborah Williamson's NPI (1386780047) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.