# Thomas Guyer · NPI 1316311053

Clinical Psychologist · San Leandro, CA · NPI 1316311053

Thomas Guyer (NPI 1316311053) is listed in the NPPES registry with the specialty Clinical Psychologist in San Leandro, CA, phone (510) 317-1445, as of the registry file of Jun 8, 2026.

Profile: https://www.gale.care/providers/ca/san-leandro/thomas-guyer-1316311053
Facts changed: 2026-10-23 · hash 23f2b620c22bf972

## Facts

- Name: Thomas Guyer (NPPES registry, self-reported, 2026-06-08) {#name}
- Credential: none on record (NPPES registry, not listed, which is not a no, 2026-06-08) {#credential}
- Specialty: Clinical Psychologist (NPPES registry, self-reported, 2026-06-08) {#specialty}
- Registry stage: as-listed (NPPES registry, self-reported, 2026-06-08) {#registry-stage}
- NPI issued: 2015 (NPPES registry, listed, 2026-06-08) {#npi-issued}
- Practice type: not-sole-proprietor (NPPES registry, self-reported, 2026-06-08) {#practice-type}
- City: San Leandro (NPPES registry, self-reported, 2026-06-08) {#city}
- State: CA (NPPES registry, self-reported, 2026-06-08) {#state}
- Phone: (510) 317-1445 (NPPES registry, self-reported, 2026-06-08) {#phone}
- New patients: yes (Cigna's directory, listed, 2026-10-18) {#new-patients}
- Insurance: Listed: Cigna's directory listed Thomas Guyer (NPI 1316311053) for Cigna / Evernorth commercial plans on Oct 18, 2026. Gale checked 51 listings in this directory by hand on Oct 22, 2026; 3 were wrong, so confirm with the office. {#ins-cigna-commercial}
- Insurance: Listed: CMS Medicare clinicians file listed Thomas Guyer (NPI 1316311053) for Original Medicare on Oct 2, 2026. Gale checked 23 listings in this file by hand on Oct 22, 2026; none were wrong. {#ins-medicare-medicare}
- Insurance: Likely: Optum Behavioral Health (UHC)'s price file suggests Optum Behavioral Health pays Thomas Guyer (NPI 1316311053) for commercial plans (file of Oct 1, 2026). That is a lead, not a directory listing. {#ins-optum-commercial}
- Insurance: Not listed by AIDS Healthcare Foundation (PHP) Medi-Cal plans for Thomas Guyer (NPI 1316311053) in AIDS Healthcare Foundation (PHP)'s directory, file of Sep 19, 2026. That is not a no. {#ins-ahf-medi-cal}
- Insurance: Not listed by AIDS Healthcare Foundation (PHP) Medicare Advantage plans for Thomas Guyer (NPI 1316311053) in AIDS Healthcare Foundation (PHP)'s directory, file of Sep 15, 2026. That is not a no. {#ins-ahf-medicare-advantage}
- Insurance: Not listed by Blue Shield of California commercial plans for Thomas Guyer (NPI 1316311053) in Blue Shield of California's directory, file of Oct 22, 2026. That is not a no. {#ins-bsc-commercial}
- Insurance: Not listed by Blue Shield of California individual and family plans for Thomas Guyer (NPI 1316311053) in Blue Shield of California's directory, file of Oct 22, 2026. That is not a no. {#ins-bsc-marketplace}
- Insurance: Not listed by Blue Shield of California Promise Health Plan Medi-Cal plans for Thomas Guyer (NPI 1316311053) in Blue Shield of California's directory, file of Oct 22, 2026. That is not a no. {#ins-bsc-medi-cal}
- Insurance: Not listed by Blue Shield of California Medicare Advantage plans for Thomas Guyer (NPI 1316311053) in Blue Shield of California's directory, file of Oct 22, 2026. That is not a no. {#ins-bsc-medicare-advantage}
- Insurance: Not listed by CalOptima Health Medi-Cal plans for Thomas Guyer (NPI 1316311053) in CalOptima Health's directory, file of Oct 11, 2026. That is not a no. {#ins-caloptima-medi-cal}
- Insurance: Not listed by CalViva Health Medi-Cal plans for Thomas Guyer (NPI 1316311053) in Health Net's directory, file of Oct 21, 2026. That is not a no. {#ins-calviva-medi-cal}
- Insurance: Not listed by Central California Alliance for Health Medi-Cal plans for Thomas Guyer (NPI 1316311053) in Central California Alliance for Health's directory, file of Oct 22, 2026. That is not a no. {#ins-ccah-medi-cal}
- Insurance: Not listed by Gold Coast Health Plan Medi-Cal plans for Thomas Guyer (NPI 1316311053) in Gold Coast Health Plan's directory, file of Oct 9, 2026. That is not a no. {#ins-goldcoast-medi-cal}
- Insurance: Not listed by Health Net commercial plans for Thomas Guyer (NPI 1316311053) in Health Net's directory, file of Oct 22, 2026. That is not a no. {#ins-healthnet-commercial}
- Insurance: Not listed by Ambetter from Health Net individual and family plans for Thomas Guyer (NPI 1316311053) in Health Net's directory, file of Oct 22, 2026. That is not a no. {#ins-healthnet-marketplace}
- Insurance: Not listed by Health Net Medi-Cal plans for Thomas Guyer (NPI 1316311053) in Health Net's directory, file of Oct 22, 2026. That is not a no. {#ins-healthnet-medi-cal}
- Insurance: Not listed by Wellcare by Health Net Medicare Advantage plans for Thomas Guyer (NPI 1316311053) in Health Net's directory, file of Oct 22, 2026. That is not a no. {#ins-healthnet-medicare-advantage}
- Insurance: Not listed by Health Plan of San Joaquin Medi-Cal plans for Thomas Guyer (NPI 1316311053) in Health Plan of San Joaquin's directory, file of Oct 2, 2026. That is not a no. {#ins-hpsj-medi-cal}
- Insurance: Not listed by Humana Medicare Advantage plans for Thomas Guyer (NPI 1316311053) in Humana's directory, file of Oct 23, 2026. That is not a no. {#ins-humana-medicare-advantage}
- Insurance: Not listed by Inland Empire Health Plan (IEHP) individual and family plans for Thomas Guyer (NPI 1316311053) in Inland Empire Health Plan (IEHP)'s directory, file of Jul 27, 2026. That is not a no. {#ins-iehp-marketplace}
- Insurance: Not listed by Inland Empire Health Plan (IEHP) Medi-Cal plans for Thomas Guyer (NPI 1316311053) in Inland Empire Health Plan (IEHP)'s directory, file of Jul 29, 2026. That is not a no. {#ins-iehp-medi-cal}
- Insurance: Not listed by Inland Empire Health Plan (IEHP) Medicare Advantage plans for Thomas Guyer (NPI 1316311053) in Inland Empire Health Plan (IEHP)'s directory, file of Oct 16, 2026. That is not a no. {#ins-iehp-medicare-advantage}
- Insurance: Not listed by Kern Family Health Care Medi-Cal plans for Thomas Guyer (NPI 1316311053) in Kern Family Health Care's directory, file of Oct 9, 2026. That is not a no. {#ins-kern-medi-cal}
- Insurance: Not listed by L.A. Care Health Plan Medi-Cal plans for Thomas Guyer (NPI 1316311053) in L.A. Care Health Plan's directory, file of Oct 19, 2026. That is not a no. {#ins-lacare-medi-cal}
- Insurance: Not listed by Medi-Cal fee-for-service for Thomas Guyer (NPI 1316311053) in DHCS Medi-Cal fee-for-service enrolment file, file of Oct 19, 2026. That is not a no. {#ins-medi-cal-ffs-medi-cal}
- Insurance: Not listed by Optum Behavioral Health Medicare Advantage plans for Thomas Guyer (NPI 1316311053) in UnitedHealthcare's directory, file of Oct 23, 2026. That is not a no. {#ins-optum-medicare-advantage}
- Insurance: Not listed by Partnership HealthPlan of California Medi-Cal plans for Thomas Guyer (NPI 1316311053) in Partnership HealthPlan of California's directory, file of Oct 16, 2026. That is not a no. {#ins-partnership-medi-cal}
- Insurance: Not listed by San Francisco Health Plan Medi-Cal plans for Thomas Guyer (NPI 1316311053) in San Francisco Health Plan's directory, file of Oct 1, 2026. That is not a no. {#ins-sfhp-medi-cal}
- Insurance: Not listed by UnitedHealthcare commercial plans for Thomas Guyer (NPI 1316311053) in UnitedHealthcare's directory, file of Oct 23, 2026. That is not a no. {#ins-uhc-commercial}
- Insurance: Not listed by UnitedHealthcare individual and family plans for Thomas Guyer (NPI 1316311053) in UnitedHealthcare's directory, file of Oct 23, 2026. That is not a no. {#ins-uhc-marketplace}
- Insurance: Not listed by UnitedHealthcare Medi-Cal plans for Thomas Guyer (NPI 1316311053) in UnitedHealthcare's directory, file of Oct 23, 2026. That is not a no. {#ins-uhc-medi-cal}
- Insurance: Not listed by UnitedHealthcare Medicare Advantage plans for Thomas Guyer (NPI 1316311053) in UnitedHealthcare's directory, file of Oct 23, 2026. That is not a no. {#ins-uhc-medicare-advantage}
- Insurance: Not listed by VA Community Care for Thomas Guyer (NPI 1316311053) in UnitedHealthcare's directory, file of Oct 23, 2026. That is not a no. {#ins-va-va}

## Answers

- New patients (listed): Cigna's directory listed Thomas Guyer (NPI 1316311053) as taking new patients on Oct 18, 2026.
- Insurance (listed): Listed for Thomas Guyer (NPI 1316311053): Cigna / Evernorth, commercial (Oct 18, 2026); Original Medicare (Oct 2, 2026). Each listing names its source and date.
- First-visit cost (not on record): Gale has no record of what a first visit with Thomas Guyer (NPI 1316311053) 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 Thomas Guyer (NPI 1316311053) offers video visits. Ask the office.
- Where (self-reported): Thomas Guyer (NPI 1316311053) is listed in San Leandro, 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 Thomas Guyer (NPI 1316311053) sees. Ask the office.
- What they help with (not on record): Gale has no record of what Thomas Guyer (NPI 1316311053) helps with beyond the registry specialty. Ask the office.
- Languages (not on record): Gale has no record of the languages Thomas Guyer (NPI 1316311053) speaks. Ask the office.
- How to book (self-reported): Call (510) 317-1445, the practice phone the NPPES registry lists for Thomas Guyer (NPI 1316311053) (Jun 8, 2026).
- Next opening (not on record): Gale has no record of the next opening for Thomas Guyer (NPI 1316311053). Ask the office.

## Sources

- NPPES registry (CMS): file of 2026-06-08 · https://npiregistry.cms.hhs.gov/provider-view/1316311053
- 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
- Cigna's directory: file of 2026-10-22 · Gale checked 51 listings in this directory by hand on Oct 22, 2026; 3 were wrong, so confirm with the office.
- 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
- Humana's directory: file of 2026-10-23
- 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
- UnitedHealthcare's directory: file of 2026-10-23 · Gale checked 12 listings in this directory by hand on Oct 22, 2026; 6 were wrong, so confirm with the office.
- Optum Behavioral Health (UHC)'s price file: 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