Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MENTAL HEALTH SYSTEMS, INC.
NPI 1831227479
Community/Behavioral Health in Fresno, CA

Q: What is Mental Health Systems, Inc.'s NPI number?

The NPI number for Mental Health Systems, Inc. is 1831227479. It was assigned to this organization in the NPPES registry on March 2, 2007. The provider is doing business as Fresno First.

Q: What is Mental Health Systems, Inc.'s specialty?

The primary specialty registered for this NPI is Community/Behavioral Health with taxonomy code 251S00000X.

Active since March 02, 2007

2550 W CLINTON AVE, BUILDINGS R, S, Y, D, P, FRESNO, CA 93705(559) 237-8337(559) 237-8342 Get Directions Write a Review

NPPES record last updated: July 24, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jul 24, 2026, Aug 27, 2020, Aug 10, 2017 (3 updates tracked since 2017).

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About Mental Health Systems, Inc. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MENTAL HEALTH SYSTEMS, INC. (NPI 1831227479), doing business as Fresno First, is a healthcare organization registered as a community/behavioral health in Fresno, California and active in the NPI registry since March 2007. The organization lists James C Callaghan, President/ceo, as its authorized official.

NPPES Registry Identity

NPI1831227479

Entity TypeOrganization

Primary Taxonomy251S00000X

Legal Business NameMENTAL HEALTH SYSTEMS, INC.

Location Address2550 W CLINTON AVE, BUILDINGS R, S, Y, D, PFresno, CA 93705-4201

Mailing Address9465 FarnhamSan Diego, CA 92123 · (858) 573-2600

Phone(559) 237-8337

Fax(559) 237-8342

Organization SubpartNo

Authorized OfficialJames C CallaghanPresident/ceo · (858) 573-2600

Enumeration DateMarch 2, 2007

Last NPPES UpdateJuly 24, 20263 updates tracked since enumeration

NPPES CertifiedJuly 24, 2026

✔ NPI 1831227479 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyCommunity/Behavioral HealthAgencies

Taxonomy Code251S00000X

Definition

A private or public agency usually under local government jurisdiction, responsible for assuring the delivery of community based mental health, intellectual disabilities, substance abuse and/or behavioral health services to individuals with those disabilities. Services may range from companion care, respite, transportation, community integration, crisis intervention and stabilization, supported employment, day support, prevocational services, residential support, therapeutic and supportive consultation, environmental modifications, intensive in-home therapy and day treatment, in addition to traditional mental health and behavioral treatment.

2550 W CLINTON AVE, Fresno, CA 93705

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Other Names 1

Doing Business AsFresno First

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

JEAN C REYES

Counselor (Mental Health)