Active NPI
Kirk Calvin Stanczyk
- Addiction (Substance Use Disorder) Counselor
- San Francisco, CA
National Provider Identifier
1619467891
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Addiction (Substance Use Disorder) Counselor
- License
- 25648
- Practice address
- 1111 Market St FL 1
San Francisco, CA 94103-1509 - Phone
- (866) 484-8049
- NPI assigned
- May 14, 2018
- Sex
- Male
- 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 |
|---|---|---|---|---|
| Addiction (Substance Use Disorder) Counselor | 101YA0400X | 25648 | CA | Primary |
Addresses
Primary practice location
1111 Market St FL 1
San Francisco, CA 94103-1509
Mailing address
1111 Market St FL 1
San Francisco, CA 94103-1509
Phone (866) 484-8049
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 |
|---|---|---|---|
| 25648 | CA | MD | Clinical Social Worker |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1526256000000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1779321600000",
"number": "1619467891",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "1111 MARKET ST FL 1",
"city": "SAN FRANCISCO",
"state": "CA",
"postal_code": "941031509",
"telephone_number": "866-484-8049"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "1111 MARKET ST FL 1",
"city": "SAN FRANCISCO",
"state": "CA",
"postal_code": "941031509",
"telephone_number": "866-484-8049"
}
],
"practiceLocations": [],
"basic": {
"last_name": "STANCZYK",
"first_name": "KIRK",
"middle_name": "CALVIN",
"sole_proprietor": "NO",
"sex": "M",
"enumeration_date": "2018-05-14",
"last_updated": "2026-05-21",
"certification_date": "2026-05-21",
"status": "A"
},
"taxonomies": [
{
"code": "101YA0400X",
"taxonomy_group": "",
"desc": "Counselor, Addiction (Substance Use Disorder)",
"state": "CA",
"license": "25648",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in San Francisco, CA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 21, 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.