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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

MENTAL HEALTH SYSTEMS, INC.
NPI 1881722429
Community/Behavioral Health in San Bernardino, CA

Active since March 02, 2007
2020 N WATERMAN AVE STE C, SAN BERNARDINO, CA 92404(909) 881-1570 Get Directions Write a Review

NPPES record last updated: July 24, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

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

About Mental Health Systems, Inc. NPPES

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

MENTAL HEALTH SYSTEMS, INC. (NPI 1881722429), doing business as Pegasus Dui San Berdardnio, is a healthcare organization registered as a community/behavioral health in San Bernardino, 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

NPI1881722429
Entity TypeOrganization
Primary Taxonomy251S00000X
Legal Business NameMENTAL HEALTH SYSTEMS, INC.
Location Address2020 N WATERMAN AVE STE CSan Bernardino, CA 92404-4849
Mailing Address9465 FarnhamSan Diego, CA 92123 · (858) 573-2600
Phone(909) 881-1570
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 1881722429 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.
2020 N WATERMAN AVE STE C, San Bernardino, CA 92404
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Other Names 2

Doing Business AsPegasus Dui San Berdardnio
Doing Business AsPegasus San Bernardino Dui Program

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

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

The NPI number for Mental Health Systems, Inc. is 1881722429. It was assigned to this organization in the NPPES registry on March 2, 2007. The provider is doing business as Pegasus DUI San Berdardnio and Pegasus San Bernardino DUI Program.

Where is Mental Health Systems, Inc. located?

Mental Health Systems, Inc. is located at 2020 N Waterman Ave Ste C, San Bernardino, CA 92404. The listed phone number is (909) 881-1570.

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

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

When was this NPI record last updated?

The NPPES record for Mental Health Systems, Inc. was last updated on July 24, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.