Active NPI
Petia Sierschynski
- Mental Health Counselor
- Lakewood, WA
National Provider Identifier
1164255170
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Mental Health Counselor
- License
- MHCA.MC.61662933
- Practice address
- 9116 Gravelly Lake Dr SW Ste 107
Lakewood, WA 98499-3148 - Phone
- (253) 256-5415
- NPI assigned
- Aug 23, 2024
- 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 | MHCA.MC.61662933 | WA | Primary |
Addresses
Primary practice location
9116 Gravelly Lake Dr SW Ste 107
Lakewood, WA 98499-3148
Mailing address
9116 Gravelly Lake Dr SW Ste 107
Lakewood, WA 98499-3148
Phone (253) 256-5415
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
| License | State | Type | Specialty |
|---|---|---|---|
| MHCA.MC.61662933 | WA | MD | Mental Health Counselor |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1724371200000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1768435200000",
"number": "1164255170",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "9116 GRAVELLY LAKE DR SW STE 107",
"city": "LAKEWOOD",
"state": "WA",
"postal_code": "984993148",
"telephone_number": "253-256-5415"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "9116 GRAVELLY LAKE DR SW STE 107",
"city": "LAKEWOOD",
"state": "WA",
"postal_code": "984993148",
"telephone_number": "253-256-5415"
}
],
"practiceLocations": [],
"basic": {
"last_name": "SIERSCHYNSKI",
"first_name": "PETIA",
"sole_proprietor": "NO",
"sex": "F",
"enumeration_date": "2024-08-23",
"last_updated": "2026-01-15",
"certification_date": "2026-01-15",
"status": "A"
},
"taxonomies": [
{
"code": "101YM0800X",
"taxonomy_group": "",
"desc": "Counselor, Mental Health",
"state": "WA",
"license": "MHCA.MC.61662933",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Lakewood, WA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 15, 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.