Sionainn Marissa Stein, LMHC, CST, NCC

Primary specialty

Mental Health CounselorTaxonomy code 101YM0800X

License

LH61466439 Issued in WA

Practice address

600 N 36TH St Ste 221
Seattle, WA 98103-8697

Phone

(425) 477-9118

Fax

(206) 338-0626

NPI assigned

Oct 26, 2021

Sex

Female

Sole proprietor

Yes

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

Specialties & licenses 1

Addresses

Other names 1

• Marissa Stein Professional name

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Opted out of Medicare

Yes, effective Jan 1, 2024 through Jan 1, 2028

Medicare enrollment (NPD)

Not enrolled

State licenses

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

{
    "created_epoch": "1635206400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1763337600000",
    "number": "1275297228",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "600 N 36TH ST STE 221",
            "city": "SEATTLE",
            "state": "WA",
            "postal_code": "981038697",
            "telephone_number": "425-477-9118"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "600 N 36TH ST STE 221",
            "city": "SEATTLE",
            "state": "WA",
            "postal_code": "981038697",
            "telephone_number": "425-477-9118",
            "fax_number": "206-338-0626"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "111 NW 140th St",
            "address_purpose": "LOCATION",
            "city": "Seattle",
            "state": "WA",
            "postal_code": "981773910",
            "country_code": "US",
            "telephone_number": "425-477-9118",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "STEIN",
        "first_name": "SIONAINN",
        "middle_name": "MARISSA",
        "credential": "LMHC, CST, NCC",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2021-10-26",
        "last_updated": "2025-11-17",
        "certification_date": "2025-11-17",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "101YM0800X",
            "taxonomy_group": "",
            "desc": "Counselor, Mental Health",
            "state": "WA",
            "license": "LH61466439",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "MARISSA",
            "last_name": "STEIN",
            "credential": "LMHC, CST, NCC",
            "code": "2",
            "type": "Professional Name"
        }
    ]
}

• Elliot Joshua Stein, MD, MSTR
• Ilene Stein, R.N., M.S.W.
• Isaac Chuang Stein, MD
• Lisa M Stein, RD, CNSC
• Mark A Stein, PHD
• Suzanne Stein, RDN
• Gideon Steinbach
• Alexander Wakefield Steinberg, MD
• Amy Emily Steinberg, MD
• Hannah Elizabeth Steinberg, MD

• Mental Health Counselor in Seattle, WA
• Providers in Seattle, WA by specialty
• Mental Health Counselor in Washington

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Nov 17, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Opt Out Affidavits.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.