NPIMap

Organization Active NPI

Mental Health Systems, Inc.

Doing business as D.A.R.T. West

  • Community/Behavioral Health Agency
  • Fresno, CA
National Provider Identifier
1841813938
Registry record updated Jul 24, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Community/Behavioral Health AgencyTaxonomy code 251S00000X
Legal business name
MENTAL HEALTH SYSTEMS, INC.
Doing business as
D.A.R.T. West
Practice address
2549 W Shaw Ave
Fresno, CA 93711-3308
Phone
(559) 264-7521
NPI assigned
May 22, 2020
Last updated
Jul 24, 2026By the provider in NPPES
Organization subpart
No

NPPES NPI Registry

Updated by the provider on Jul 24, 2026

Registry information is reported by the provider to CMS and is not verified. About this source

Authorized official

Name
James C Callaghan Jr.
Title
President/Ceo
Phone
(858) 573-2600

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Community/Behavioral Health Agency 251S00000X Primary

Addresses

Primary practice location

2549 W Shaw Ave
Fresno, CA 93711-3308

Mailing address

9465 Farnham St
San Diego, CA 92123-1308

Other names 1

  • D.A.R.T. West Doing business as

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in CA

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
O20050512000474 CA Part B Supplier - Clinic/Group Practice 8628019320 Receives reassigned benefits from 74 practitioners
20 other NPIs on this enrollment
This NPI is an additional NPI on the enrollment
Practice locations: Fresno, CA; Vista, CA; Santee, CA; San Jose, CA; San Diego, CA; Escondido, CA; Oceanside, CA

Other NPIs on the same Medicare enrollment 15

NPIs listed together on one Medicare enrollment, typically parts of the same organization.

View all 15

National Provider Directory

National Provider Directory
Tax ID family
Mental Health Systems Inc48 organizations share this tax ID, including this one

Other organizations with this tax ID 47

Organizations that report the same tax identification number in the National Provider Directory.

View all 47

Locations

2550 W Clinton Ave
Bldg W
Fresno, CA 93705
Phone (559) 264-7521

Practitioners & affiliated clinicians

Practitioners 66

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles, and the practitioner matching its NPPES authorized official.

View all 66

NPI Registry JSON

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1590105600000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1784851200000",
    "number": "1841813938",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "9465 FARNHAM ST",
            "city": "SAN DIEGO",
            "state": "CA",
            "postal_code": "921231308"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2549 W SHAW AVE",
            "city": "FRESNO",
            "state": "CA",
            "postal_code": "937113308",
            "telephone_number": "559-264-7521"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "MENTAL HEALTH SYSTEMS, INC.",
        "organizational_subpart": "NO",
        "enumeration_date": "2020-05-22",
        "last_updated": "2026-07-24",
        "certification_date": "2026-07-24",
        "status": "A",
        "authorized_official_last_name": "CALLAGHAN",
        "authorized_official_first_name": "JAMES",
        "authorized_official_middle_name": "C",
        "authorized_official_title_or_position": "PRESIDENT/CEO",
        "authorized_official_telephone_number": "858-573-2600",
        "authorized_official_name_suffix": "Jr."
    },
    "taxonomies": [
        {
            "code": "251S00000X",
            "taxonomy_group": "",
            "desc": "Community/Behavioral Health",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "organization_name": "D.A.R.T. West",
            "code": "3",
            "type": "Doing Business As"
        }
    ]
}

Other providers in Fresno, CA

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 24, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
  • Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
  • National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.