Mr. Gregory A. Aleff, LCSW
Mr. Gregory A. Aleff is a Clinical Social Worker provider (Social Worker) practicing in Appleton, WI, registered in the NPPES registry with NPI 1942245592 since 2006. The credential LCSW stands for Licensed Clinical Social Worker.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1942245592 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Mr. Gregory A. Aleff |
| Credential | LCSW |
| Sex | Male |
| Practice address | 10 TRI PARK WAY, Appleton, WI, 54914 |
| Phone | 9208317909 |
| Enumeration date | 2006-06-18 |
| Last updated in NPPES | 2007-07-08 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 1041C0700X | Clinical Social Worker | Primary | 962-123 | WI |
LCSW — Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy. About the LCSW credential
Copy-ready billing details
Provider: Gregory Aleff, LCSW NPI: 1942245592 Taxonomy: 1041C0700X (Clinical Social Worker) Address: 10 TRI PARK WAY, Appleton, WI, 54914
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1447256920 | Bonnie Mccluskey | Individual | General Practice Registered Nurse | Appleton, WI |
| 1710971627 | James Burwitz | Individual | Family Medicine Physician | Appleton, WI |
| 1679552905 | Tom Zurakowski | Individual | Optometrist | Appleton, WI |
| 1447224290 | Lori Poss | Individual | Family Nurse Practitioner | Appleton, WI |
| 1518918705 | Milwaukee Vamc | Organization | VA Clinic/Center | Appleton, WI |
| 1689621930 | Lisa Knoff | Individual | Pharmacotherapy Pharmacist | Appleton, WI |
| 1366489478 | Mark Regnier | Individual | Pharmacotherapy Pharmacist | Appleton, WI |
| 1467480970 | Michaele Kulick | Individual | Clinical Social Worker | Appleton, WI |
Verify this record
Cross-check NPI 1942245592 against the authoritative CMS record: view Mr. Gregory A. Aleff on the official NPPES registry .
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.
Frequently asked questions
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-07-08.