Active NPI
Karen Pieczynski, LCSW
- Clinical Social Worker
- Denver, CO
National Provider Identifier
1225563901
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Clinical Social Worker
- License
- LCSW- 16628
- Practice address
- 1500 N Grant St Ste N
Denver, CO 80203-1859 - Phone
- (602) 935-9828
- NPI assigned
- May 1, 2017
- Sex
- Female
- Sole proprietor
- Yes
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 |
|---|---|---|---|---|
| Clinical Social Worker | 1041C0700X | LCSW- 16628 | AZ | Primary |
Addresses
Primary practice location
1500 N Grant St Ste N
Denver, CO 80203-1859
Mailing address
1500 N Grant St Ste N
Denver, CO 80203-1859
Phone (602) 935-9828
Other practice location 1
1930 S Alma School Rd Ste B214
Mesa, AZ 85210-2104
Phone (724) 456-4414
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)
- Enrolled
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| LCSW- 16628 | AZ | MD | Clinical Social Worker |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1493596800000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1770336000000",
"number": "1225563901",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "1500 N GRANT ST STE N",
"city": "DENVER",
"state": "CO",
"postal_code": "802031859",
"telephone_number": "602-935-9828"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "1500 N GRANT ST STE N",
"city": "DENVER",
"state": "CO",
"postal_code": "802031859",
"telephone_number": "602-935-9828"
}
],
"practiceLocations": [
{
"address_1": "1930 S Alma School Rd Ste B214",
"address_purpose": "LOCATION",
"city": "Mesa",
"state": "AZ",
"postal_code": "852102104",
"country_code": "US",
"telephone_number": "724-456-4414",
"country_name": "United States",
"address_type": "DOM"
}
],
"basic": {
"last_name": "PIECZYNSKI",
"first_name": "KAREN",
"credential": "LCSW",
"sole_proprietor": "YES",
"sex": "F",
"enumeration_date": "2017-05-01",
"last_updated": "2026-02-06",
"certification_date": "2026-02-06",
"status": "A"
},
"taxonomies": [
{
"code": "1041C0700X",
"taxonomy_group": "",
"desc": "Social Worker, Clinical",
"state": "AZ",
"license": "LCSW- 16628",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Denver, CO
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 6, 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.