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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 1740846542
Clinic/Center - Community Health in San Diego, CA

Active since May 16, 2019
5555 RESERVOIR DR STE 204A, SAN DIEGO, CA 92120(858) 573-2600 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, May 16, 2019 (3 updates tracked since 2019).

About Mental Health Systems, Inc. NPPES

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

MENTAL HEALTH SYSTEMS, INC. (NPI 1740846542), doing business as Alianza Wellness Center, is a healthcare organization registered as a community health in San Diego, California and active in the NPI registry since May 2019. The organization lists James C Callaghan, President/ceo, as its authorized official.

NPPES Registry Identity

NPI1740846542
Entity TypeOrganization
Primary Taxonomy261QC1500X
Legal Business NameMENTAL HEALTH SYSTEMS, INC.
Location Address5555 RESERVOIR DR STE 204ASan Diego, CA 92120-5134
Mailing Address9465 Farnham StSan Diego, CA 92123-1308 · (858) 573-2600
Phone(858) 573-2600
Organization SubpartNo
Authorized OfficialJames C CallaghanPresident/ceo · (858) 573-2600
Enumeration DateMay 16, 2019
Last NPPES UpdateJuly 24, 20263 updates tracked since enumeration
NPPES CertifiedJuly 24, 2026
✔ NPI 1740846542 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyClinic/Center · Community HealthAmbulatory Health Care Facilities
Taxonomy Code261QC1500X
5555 RESERVOIR DR STE 204A, San Diego, CA 92120
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Other Names 1

Doing Business AsAlianza Wellness Center

Other Providers at the Same Location NPPES 3

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

IVOON LONGHURST
Student in an Organized Health Care Education/Training Program
5555 RESERVOIR DR STE 204A
SAN DIEGO, CA 92120
San Diego County (619) 822-1800
LUIS ALBERTO MONTEON BECERRA
Rehabilitation Practitioner
5555 RESERVOIR DR STE 204A
SAN DIEGO, CA 92120
San Diego County (619) 822-1800
EMON ALYSE PERRIN
Rehabilitation Practitioner
5555 RESERVOIR DR STE 204A
SAN DIEGO, CA 92120
San Diego County (619) 822-1800

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 1740846542. It was assigned to this organization in the NPPES registry on May 16, 2019. The provider is doing business as Alianza Wellness Center.

Where is Mental Health Systems, Inc. located?

Mental Health Systems, Inc. is located at 5555 Reservoir Dr Ste 204A, San Diego, CA 92120. The listed phone number is (858) 573-2600.

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

The primary specialty registered for this NPI is Clinic/Center, specializing in Community Health, with taxonomy code 261QC1500X.

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 weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.