Charles P Mayer-Twomey, LCSW

Primary specialty

Clinical Social WorkerTaxonomy code 1041C0700X

License

09924139 Issued in CO

Practice address

8665 W 78TH PL
Arvada, CO 80005-4313

Phone

(510) 689-3725

NPI assigned

Dec 18, 2006

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 4

Addresses

Other names 1

• Charlie Mayer Other name

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Not enrolled

State licenses

Practice roles

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

• Mountain Thrive Counseling PLLC

  • Clinical Social Worker
  • Denver, CO
  • NPI 1285390138
  NPD (past) Authorized official
• Mountain Thrive Counseling PLLC

  • Clinical Social Worker
  • Arvada, CO
  • NPI 1710803531
  NPD (past) Authorized official

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

{
    "created_epoch": "1166400000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1782691200000",
    "number": "1932262276",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "8665 W 78TH PL",
            "city": "ARVADA",
            "state": "CO",
            "postal_code": "800054313",
            "telephone_number": "510-689-3725"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "8665 W 78TH PL",
            "city": "ARVADA",
            "state": "CO",
            "postal_code": "800054313",
            "telephone_number": "510-689-3725"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MAYER-TWOMEY",
        "first_name": "CHARLES",
        "middle_name": "P",
        "credential": "LCSW",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2006-12-18",
        "last_updated": "2026-06-29",
        "certification_date": "2026-06-29",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "101YM0800X",
            "taxonomy_group": "",
            "desc": "Counselor, Mental Health",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "104100000X",
            "taxonomy_group": "",
            "desc": "Social Worker",
            "state": "CA",
            "license": "28453",
            "primary": false
        },
        {
            "code": "1041C0700X",
            "taxonomy_group": "",
            "desc": "Social Worker, Clinical",
            "state": "CA",
            "license": "29373",
            "primary": false
        },
        {
            "code": "1041C0700X",
            "taxonomy_group": "",
            "desc": "Social Worker, Clinical",
            "state": "CO",
            "license": "09924139",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "CHARLIE",
            "last_name": "MAYER",
            "code": "5",
            "type": "Other Name"
        }
    ]
}

• Jennifer Rose Mathews, PHARMD
• Ganeev Mattu, DDS
• Maximal Balance
• Kris May
• Steven Maya
• Ann Mayes
• Lisa Gail Maynard, MS
• James R Mayo, D.D.S.
• Marion Beth Mazzola, MD
• Mbo Vision Inc

• Clinical Social Worker in Arvada, CO
• Providers in Arvada, CO by specialty
• Clinical Social Worker in Colorado

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 29, 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.