NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John Freienbergs, LICSW

Clinical Social Worker in Worcester, MA · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1679597678

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name John Freienbergs
Credential LICSW
Sex Male
Practice address 108 Grove St, Worcester, MA, 01605
Phone (508) 753-3220
Fax (508) 753-3224
Enumeration date Jul 26, 2006
Last updated in NPPES Mar 21, 2011

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 1020823 (MA) Primary

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 → Validate an NPI →

Frequently asked questions

What is the NPI number for John Freienbergs?
The National Provider Identifier (NPI) for John Freienbergs is 1679597678, a Type 1 (individual) record in the CMS NPPES registry.
Where does John Freienbergs practice?
The practice location on file with NPPES is in Worcester, MA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-03-21.