Individual provider Active NPI

Maria Theresa Hamper, LICSW

  • Clinical Social Worker
  • Federal Way, WA
National Provider Identifier
1780368670
Registry record updated Apr 10, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Clinical Social WorkerTaxonomy code 1041C0700X
License
LW61463809 Issued in WA
Practice address
3430 SW 320TH St Ste D2
Federal Way, WA 98023-2292
Phone
(253) 289-6099
NPI assigned
Jun 12, 2023
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Apr 10, 2026

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Clinical Social Worker 1041C0700X LW61463809 WA Primary

Addresses

Primary practice location

3430 SW 320TH St Ste D2
Federal Way, WA 98023-2292

Mailing address

3430 SW 320TH St Ste D2
Federal Way, WA 98023-2292
Phone (253) 289-6099

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Not listed in the public Medicare enrollment file

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Not enrolled

State licenses

LicenseStateTypeSpecialty
LW61463809WAMDClinical Social Worker

Practice roles

OrganizationSpecialtyStatusNew patients
Twin Lakes Counseling, PLLC Mental Health CurrentSince Dec 1, 2024 Accepting new patients

Locations

3430 SW 320th St
Ste D2
Federal Way, WA 98023
Phone (253) 289-6099

Organizations & group practices 1

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.

NPI Registry JSON

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

{
    "created_epoch": "1686528000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1775779200000",
    "number": "1780368670",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3430 SW 320TH ST STE D2",
            "city": "FEDERAL WAY",
            "state": "WA",
            "postal_code": "980232292",
            "telephone_number": "253-289-6099"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3430 SW 320TH ST STE D2",
            "city": "FEDERAL WAY",
            "state": "WA",
            "postal_code": "980232292",
            "telephone_number": "253-289-6099"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "HAMPER",
        "first_name": "MARIA",
        "middle_name": "THERESA",
        "credential": "LICSW",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2023-06-12",
        "last_updated": "2026-04-10",
        "certification_date": "2026-04-10",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "1041C0700X",
            "taxonomy_group": "",
            "desc": "Social Worker, Clinical",
            "state": "WA",
            "license": "LW61463809",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Federal Way, WA

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 10, 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.