Active NPI
Mallory Thrall
- Mental Health Counselor
- Seattle, WA
National Provider Identifier
1255103362
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Mental Health Counselor
- Practice address
- 3814 11TH Ave W
Unit 26
Seattle, WA 98119 - Phone
- (704) 966-9473
- NPI assigned
- Oct 23, 2023
- Last updated
- Jan 16, 2026
- Sex
- Female
- Sole proprietor
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Mental Health Counselor | 101YM0800X | Primary |
Addresses
Primary practice location
3814 11TH Ave W
Unit 26
Seattle, WA 98119
Mailing address
3814 11TH Ave W
Unit 26
Seattle, WA 98119
Phone (704) 966-9473
Other practice location 1
639 Cullum Ave Unit 854
Richland, WA 99352-5048
Phone (509) 205-5559
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Not listed in the public Medicare enrollment file
- Opted out of Medicare
- Yes, effective Nov 27, 2025 through Nov 27, 2027
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Not enrolled
Practice roles
| Organization | Specialty | Status | New patients |
|---|---|---|---|
| Lycan Counseling, PLLC | Mental Health | Current | Accepting new patients |
| Thrall Counseling, PLLC | Mental Health | Current | Accepting new patients |
Locations
639 Cullum Ave
Unit 854
Richland, WA 99352
Phone (509) 205-5559
Organizations & group practices 2
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.
-
- Mental Health Counselor
- Seattle, WA
- NPI 1912869926
-
dba Lycan Counseling Collective
- Mental Health Counselor
- Richland, WA
- NPI 1477025047
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1698019200000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1768521600000",
"number": "1255103362",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "3814 11TH AVE W",
"address_2": "UNIT 26",
"city": "SEATTLE",
"state": "WA",
"postal_code": "98119",
"telephone_number": "704-966-9473"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "3814 11TH AVE W",
"address_2": "UNIT 26",
"city": "SEATTLE",
"state": "WA",
"postal_code": "98119",
"telephone_number": "704-966-9473"
}
],
"practiceLocations": [
{
"address_1": "639 Cullum Ave Unit 854",
"address_purpose": "LOCATION",
"city": "Richland",
"state": "WA",
"postal_code": "993525048",
"country_code": "US",
"telephone_number": "509-205-5559",
"country_name": "United States",
"address_type": "DOM"
}
],
"basic": {
"last_name": "THRALL",
"first_name": "MALLORY",
"sole_proprietor": "NO",
"sex": "F",
"enumeration_date": "2023-10-23",
"last_updated": "2026-01-16",
"certification_date": "2026-01-16",
"status": "A"
},
"taxonomies": [
{
"code": "101YM0800X",
"taxonomy_group": "",
"desc": "Counselor, Mental Health",
"state": null,
"license": null,
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Seattle, WA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 16, 2026; 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.