# Derek Williamson, AMFT · NPI 1013780865

Marriage & Family Therapist · Redding, CA · NPI 1013780865

Derek Williamson, AMFT (NPI 1013780865) is listed in the NPPES registry with the specialty Marriage & Family Therapist in Redding, CA, phone (530) 722-9957, as of the registry file of Jun 8, 2026.

Profile: https://www.gale.care/providers/ca/redding/derek-williamson-amft-1013780865
Facts changed: 2026-10-22 · hash fd92a5898c834f44

## Facts

- Name: Derek Williamson (NPPES registry, self-reported, 2026-06-08) {#name}
- Credential: AMFT (NPPES registry, self-reported, 2026-06-08) {#credential}
- Specialty: Marriage & Family Therapist (NPPES registry, self-reported, 2026-06-08) {#specialty}
- Registry stage: as-listed (NPPES registry, self-reported, 2026-06-08) {#registry-stage}
- NPI issued: 2023 (NPPES registry, listed, 2026-06-08) {#npi-issued}
- Practice type: sole-proprietor (NPPES registry, self-reported, 2026-06-08) {#practice-type}
- City: Redding (NPPES registry, self-reported, 2026-06-08) {#city}
- State: CA (NPPES registry, self-reported, 2026-06-08) {#state}
- Phone: (530) 722-9957 (NPPES registry, self-reported, 2026-06-08) {#phone}
- Insurance: Not listed by AIDS Healthcare Foundation (PHP) for Derek Williamson, AMFT (NPI 1013780865) in AIDS Healthcare Foundation (PHP)'s directory, file of Sep 19, 2026. That is not a no. {#ins-not-listed-ahf-fhir-directory}
- Insurance: Not listed by Blue Shield of California for Derek Williamson, AMFT (NPI 1013780865) in Blue Shield of California's directory, file of Oct 22, 2026. That is not a no. {#ins-not-listed-bsc-fhir-directory}
- Insurance: Not listed by CalOptima Health for Derek Williamson, AMFT (NPI 1013780865) in CalOptima Health's directory, file of Oct 11, 2026. That is not a no. {#ins-not-listed-caloptima-fhir-directory}
- Insurance: Not listed by Central California Alliance for Health for Derek Williamson, AMFT (NPI 1013780865) in Central California Alliance for Health's directory, file of Oct 22, 2026. That is not a no. {#ins-not-listed-ccah-fhir-directory}
- Insurance: Not listed by Original Medicare for Derek Williamson, AMFT (NPI 1013780865) in CMS Medicare clinicians file, file of Oct 2, 2026. That is not a no. {#ins-not-listed-cms-medicare-clinicians}
- Insurance: Not listed by Medi-Cal fee-for-service for Derek Williamson, AMFT (NPI 1013780865) in DHCS Medi-Cal fee-for-service enrolment file, file of Oct 19, 2026. That is not a no. {#ins-not-listed-dhcs-ffs-enrolled-2026-10-19}
- Insurance: Not listed by Gold Coast Health Plan for Derek Williamson, AMFT (NPI 1013780865) in Gold Coast Health Plan's directory, file of Oct 9, 2026. That is not a no. {#ins-not-listed-goldcoast-fhir-directory}
- Insurance: Not listed by Health Net for Derek Williamson, AMFT (NPI 1013780865) in Health Net's directory, file of Oct 22, 2026. That is not a no. {#ins-not-listed-healthnet-fhir-directory}
- Insurance: Not listed by Health Plan of San Joaquin for Derek Williamson, AMFT (NPI 1013780865) in Health Plan of San Joaquin's directory, file of Oct 2, 2026. That is not a no. {#ins-not-listed-hpsj-fhir-directory}
- Insurance: Not listed by Inland Empire Health Plan (IEHP) for Derek Williamson, AMFT (NPI 1013780865) in Inland Empire Health Plan (IEHP)'s directory, file of Oct 16, 2026. That is not a no. {#ins-not-listed-iehp-fhir-directory}
- Insurance: Not listed by Kern Family Health Care for Derek Williamson, AMFT (NPI 1013780865) in Kern Family Health Care's directory, file of Oct 9, 2026. That is not a no. {#ins-not-listed-kern-fhir-directory}
- Insurance: Not listed by L.A. Care Health Plan for Derek Williamson, AMFT (NPI 1013780865) in L.A. Care Health Plan's directory, file of Oct 19, 2026. That is not a no. {#ins-not-listed-lacare-fhir-directory}
- Insurance: Not listed by Partnership HealthPlan of California for Derek Williamson, AMFT (NPI 1013780865) in Partnership HealthPlan of California's directory, file of Oct 16, 2026. That is not a no. {#ins-not-listed-partnership-fhir-directory}
- Insurance: Not listed by San Francisco Health Plan for Derek Williamson, AMFT (NPI 1013780865) in San Francisco Health Plan's directory, file of Oct 1, 2026. That is not a no. {#ins-not-listed-sfhp-fhir-directory}
- Insurance: Not listed by VA Community Care for Derek Williamson, AMFT (NPI 1013780865) in VA's community care locator, file of Oct 22, 2026. That is not a no. {#ins-not-listed-va-ccn-vagov-locator-2026-10}

## Answers

- New patients (not on record): Gale has no record of whether Derek Williamson, AMFT (NPI 1013780865) is taking new patients. Ask the office.
- Insurance (not listed, which is not a no): Not listed by AIDS Healthcare Foundation (PHP), Blue Shield of California, CalOptima Health, Central California Alliance for Health, Gold Coast Health Plan, Health Net, Health Plan of San Joaquin, Inland Empire Health Plan (IEHP), Kern Family Health Care, L.A. Care Health Plan, Medi-Cal fee-for-service, Original Medicare, Partnership HealthPlan of California, San Francisco Health Plan or VA Community Care for Derek Williamson, AMFT (NPI 1013780865), in the files Gale read for California on Oct 23, 2026. That is not a no. Ask the office.
- First-visit cost (not on record): Gale has no record of what a first visit with Derek Williamson, AMFT (NPI 1013780865) costs. Paying yourself? You can ask for a written Good Faith Estimate before the visit.
- Video visits (not on record): Gale has no record of whether Derek Williamson, AMFT (NPI 1013780865) offers video visits. Ask the office.
- Where (self-reported): Derek Williamson, AMFT (NPI 1013780865) is listed in Redding, CA by the NPPES registry, as of the registry file of Jun 8, 2026.
- Who they see (not on record): Gale has no record of who Derek Williamson, AMFT (NPI 1013780865) sees. Ask the office.
- What they help with (not on record): Gale has no record of what Derek Williamson, AMFT (NPI 1013780865) helps with beyond the registry specialty. Ask the office.
- Languages (not on record): Gale has no record of the languages Derek Williamson, AMFT (NPI 1013780865) speaks. Ask the office.
- How to book (self-reported): Call (530) 722-9957, the practice phone the NPPES registry lists for Derek Williamson, AMFT (NPI 1013780865) (Jun 8, 2026).
- Next opening (not on record): Gale has no record of the next opening for Derek Williamson, AMFT (NPI 1013780865). Ask the office.

## Sources

- NPPES registry (CMS): file of 2026-06-08 · https://npiregistry.cms.hhs.gov/provider-view/1013780865
- AIDS Healthcare Foundation (PHP)'s directory: file of 2026-09-19
- Blue Shield of California's directory: file of 2026-10-22 · Gale checked 60 listings in this directory by hand on Oct 22, 2026; 23 were wrong, so confirm with the office.
- CalOptima Health's directory: file of 2026-10-11 · Gale checked 12 listings in this directory by hand on Oct 22, 2026; 4 were wrong, so confirm with the office.
- Central California Alliance for Health's directory: file of 2026-10-22
- CMS Medicare clinicians file: file of 2026-10-02 · Gale checked 23 listings in this file by hand on Oct 22, 2026; none were wrong.
- DHCS Medi-Cal fee-for-service enrolment file: file of 2026-10-19
- Gold Coast Health Plan's directory: file of 2026-10-09
- Health Net's directory: file of 2026-10-22 · Gale checked 12 listings in this directory by hand on Oct 22, 2026; 6 were wrong, so confirm with the office.
- Health Plan of San Joaquin's directory: file of 2026-10-02
- Inland Empire Health Plan (IEHP)'s directory: file of 2026-10-16 · Gale checked 12 listings in this directory by hand on Oct 22, 2026; 4 were wrong, so confirm with the office.
- Kern Family Health Care's directory: file of 2026-10-09
- L.A. Care Health Plan's directory: file of 2026-10-19 · Gale checked 12 listings in this directory by hand on Oct 22, 2026; 4 were wrong, so confirm with the office.
- Partnership HealthPlan of California's directory: file of 2026-10-16
- San Francisco Health Plan's directory: file of 2026-10-01
- VA's community care locator: file of 2026-10-22

## About these facts

- Status words: How each fact is known. confirmed = Listed: a named directory, CMS file or state file lists it. inferred = Likely: a price file suggests it; a likely match is a lead, not a listing. self-reported: the clinician said it, to the NPPES registry or on Gale. not-listed: a source that lists every clinician it covers was read and does not list this one; that is not a no. unknown: no record; ask the office.
- Dates: The date the source gives this record (YYYY-MM-DD). It is not the date of the event the record describes: an opt-out states its own start and end dates in its sentence.
- Hash: Changes only when a fact changes, never on a re-check.

This provider is not affiliated with Gale. This listing is compiled from the NPPES public registry (CMS).
Terms: https://www.gale.care/agents#terms