Steven John Kniffen, SUDRC LL, CMPSS

Primary specialty

Addiction (Substance Use Disorder) CounselorTaxonomy code 101YA0400X

License

R1594160125 Issued in CA

Practice address

1401 E 4TH St
Long Beach, CA 90802-1800

Phone

(562) 453-5157

NPI assigned

Oct 23, 2025

Last updated

Oct 23, 2025By the provider in NPPES

Sex

Male

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

Locations

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

• Transformational Living Homes Inc.

  • Peer Specialist
  • Long Beach, CA
  • NPI 1346055324
  NPD

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

{
    "created_epoch": "1761177600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1761177600000",
    "number": "1881562742",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1124 DAWSON AVE.",
            "address_2": "#2",
            "city": "LONG BEACH",
            "state": "CA",
            "postal_code": "90804",
            "telephone_number": "562-721-8298"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1401 E 4TH ST",
            "city": "LONG BEACH",
            "state": "CA",
            "postal_code": "908021800",
            "telephone_number": "562-453-5157"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1355 Redondo Ave Ste 2",
            "address_purpose": "LOCATION",
            "city": "Long Beach",
            "state": "CA",
            "postal_code": "908042844",
            "country_code": "US",
            "telephone_number": "562-986-5046",
            "fax_number": "562-986-5048",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "KNIFFEN",
        "first_name": "STEVEN",
        "middle_name": "JOHN",
        "credential": "SUDRC LL, CMPSS",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2025-10-23",
        "last_updated": "2025-10-23",
        "certification_date": "2025-10-05",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "101YA0400X",
            "taxonomy_group": "",
            "desc": "Counselor, Addiction (Substance Use Disorder)",
            "state": "CA",
            "license": "R1594160125",
            "primary": true
        },
        {
            "code": "175T00000X",
            "taxonomy_group": "",
            "desc": "Peer Specialist",
            "state": "CA",
            "license": "MPSS-HSZTOD",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Shannon Klosak, LMFT
• Ryan Klotz
• Nataliya Vadimovna Kloyzner, FNP-BC
• Adam Klueger, DPT
• KMK Clinical Inc
• Cassandra D Knight, L.M.T.
• Darren Knight, MD
• Denise Knight, P.T.
• Jennifer Knight
• Jessica Knight, LCSW

• Addiction (Substance Use Disorder) Counselor in Long Beach, CA
• Providers in Long Beach, 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 Oct 23, 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.