NPIMap

Organization Active NPI

Mental Health Systems, Inc.

Doing business as Pegasus DUI San Berdardnio

  • Community/Behavioral Health Agency
  • San Bernardino, CA
National Provider Identifier
1881722429
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
Pegasus DUI San Berdardnio
Practice address
2020 N Waterman Ave Ste C
San Bernardino, CA 92404-4849
Phone
(909) 881-1570
NPI assigned
Mar 2, 2007
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 NU Primary

Addresses

Primary practice location

2020 N Waterman Ave Ste C
San Bernardino, CA 92404-4849

Mailing address

9465 Farnham
San Diego, CA 92123
Phone (858) 573-2600

Other names 1

  • Pegasus DUI San Berdardnio Doing business as

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

2020 N Waterman Ave
Ste C
Sn Bernrdno, CA 92404
Phone (909) 881-1570

Practitioners & affiliated clinicians

Practitioners 3

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.

NPI Registry JSON

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

{
    "created_epoch": "1172793600000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1784851200000",
    "number": "1881722429",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "9465 FARNHAM",
            "city": "SAN DIEGO",
            "state": "CA",
            "postal_code": "92123",
            "telephone_number": "858-573-2600"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2020 N WATERMAN AVE STE C",
            "city": "SAN BERNARDINO",
            "state": "CA",
            "postal_code": "924044849",
            "telephone_number": "909-881-1570"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "MENTAL HEALTH SYSTEMS, INC.",
        "organizational_subpart": "NO",
        "enumeration_date": "2007-03-02",
        "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": "NU",
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "organization_name": "Pegasus DUI San Berdardnio",
            "code": "3",
            "type": "Doing Business As"
        },
        {
            "organization_name": "Pegasus DUI San Berdardnio",
            "code": "3",
            "type": "Doing Business As"
        }
    ]
}

Other providers in San Bernardino, 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.
  • National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.