Marissa Dawn Oneill, CAPDT

Primary specialty

Addiction (Substance Use Disorder) CounselorTaxonomy code 101YA0400X

License

24546 Issued in CA

Practice address

1724 Bryant St
San Francisco, CA 94110-1406

Phone

(415) 558-9125

NPI assigned

Mar 31, 2026

Sex

Female

Sole proprietor

No

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

Specialties & licenses 2

Addresses

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.

• Latino Commission on Alcohol and Drug Abuse Services of San Mateo Coun

  • Children's Substance Abuse Rehabilitation Facility
  • San Francisco, CA
  • NPI 1588700264
  NPD (past)
• Latino Commission on Alcohol and Drug Abuse Services of San Mateo Coun

  • Substance Abuse Rehabilitation Facility
  • San Bruno, CA
  • NPI 1720376064
  NPD (past)

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

{
    "created_epoch": "1774915200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1774915200000",
    "number": "1649110255",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "222 TAYLOR ST APT M2",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941022934",
            "telephone_number": "415-987-5237"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1724 BRYANT ST",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941101406",
            "telephone_number": "415-558-9125"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "508 7th Ave",
            "address_purpose": "LOCATION",
            "city": "San Bruno",
            "state": "CA",
            "postal_code": "940664522",
            "country_code": "US",
            "telephone_number": "650-244-1444",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "ONEILL",
        "first_name": "MARISSA",
        "middle_name": "DAWN",
        "credential": "CAPDT",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2026-03-31",
        "last_updated": "2026-03-31",
        "certification_date": "2026-03-31",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "101YM0800X",
            "taxonomy_group": "",
            "desc": "Counselor, Mental Health",
            "state": "CA",
            "license": "24546",
            "primary": false
        },
        {
            "code": "101YA0400X",
            "taxonomy_group": "",
            "desc": "Counselor, Addiction (Substance Use Disorder)",
            "state": "CA",
            "license": "24546",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• One Medical Seniors Group, Inc.
• Richard Fong One, DDS
• Lynne Elizabeth Oneal, CAADE
• Onederful, Inc.
• Daniel Paul Oneill, MD
• Carolina Ong, OTR, L
• Christopher Ong
• Dung T.B. Ong
• Eddie Ngai Ong, PHD
• Elliza Marie Tolome Ong, CRNA

• Addiction (Substance Use Disorder) Counselor in San Francisco, CA
• Providers in San Francisco, CA by specialty
• Addiction (Substance Use Disorder) Counselor in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 31, 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.