Mountain Regional Services, Inc

Primary specialty

Developmentally Disabled Services Day Training AgencyTaxonomy code 251C00000X

Legal business name

MOUNTAIN REGIONAL SERVICES, INC

Doing business as

Cornerstone Behavioral Health

Practice address

50 Allegiance Cir
Evanston, WY 82930-3804

Phone

(307) 789-3710

Fax

(307) 789-0823

NPI assigned

Nov 13, 2006

Last updated

Sep 11, 2025By the provider in NPPES

Organization subpart

No

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

Authorized official

Name

Mr. John Holderegger

Title

Ceo

Phone

(307) 789-3710

Specialties & licenses 7

Addresses

Other names 1

• Cornerstone Behavioral Health Doing business as

Locations

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

{
    "created_epoch": "1163376000000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1757548800000",
    "number": "1962573782",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 6005",
            "city": "EVANSTON",
            "state": "WY",
            "postal_code": "829316005",
            "telephone_number": "307-789-3710",
            "fax_number": "307-789-0823"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "50 ALLEGIANCE CIR",
            "city": "EVANSTON",
            "state": "WY",
            "postal_code": "829303804",
            "telephone_number": "307-789-3710",
            "fax_number": "307-789-0823"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "organization_name": "MOUNTAIN REGIONAL SERVICES, INC",
        "organizational_subpart": "NO",
        "enumeration_date": "2006-11-13",
        "last_updated": "2025-09-11",
        "status": "A",
        "authorized_official_last_name": "HOLDEREGGER",
        "authorized_official_first_name": "JOHN",
        "authorized_official_title_or_position": "CEO",
        "authorized_official_telephone_number": "307-789-3710",
        "authorized_official_name_prefix": "Mr."
    },
    "taxonomies": [
        {
            "code": "101YA0400X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Counselor, Addiction (Substance Use Disorder)",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "101YM0800X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Counselor, Mental Health",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "103TC0700X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Psychologist, Clinical",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "103TM1800X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Psychologist, Intellectual & Developmental Disabilities",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "251C00000X",
            "taxonomy_group": "",
            "desc": "Day Training, Developmentally Disabled Services",
            "state": null,
            "license": null,
            "primary": true
        },
        {
            "code": "261QM0801X",
            "taxonomy_group": "",
            "desc": "Clinic/Center, Mental Health (Including Community Mental Health Center)",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "261QR0405X",
            "taxonomy_group": "",
            "desc": "Clinic/Center, Rehabilitation, Substance Use Disorder",
            "state": null,
            "license": null,
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "organization_name": "Cornerstone Behavioral Health",
            "code": "3",
            "type": "Doing Business As"
        }
    ]
}

• Emily Morton
• Anjoli Christene Mosier, GED
• Mountain Heart Midwifery LLC
• Mountain Medicine LLC
• Mountain Regional Services, Inc
• Mountain Regional Services, Inc.
• Mountain Regional Services, Inc. (Cornerstone Behavioral Health)
• Angie Dee Mueller
• Steven Edward Muller, RPH
• Julia E Murray, MED

• Developmentally Disabled Services Day Training Agency in Evanston, WY
• Providers in Evanston, WY by specialty
• Developmentally Disabled Services Day Training Agency in Wyoming

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 11, 2025; 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.