NPI Portal NPI Lookup & Verification

Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Donna Greifer LLC

Psychologist in Altamonte Springs, FL · enumerated 2011 · authorized official Donna Greifer, Licensed Psychologist Owner.

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

National Provider Identifier

1851672869

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)
Legal business name Donna Greifer LLC
Practice address 455 Douglas Ave, 2155-30, Altamonte Springs, FL, 32714
Phone (305) 987-0170
Fax (407) 401-9023
Enumeration date Sep 2, 2011
Last updated in NPPES Sep 2, 2011

Taxonomy & classification

103T00000X Psychologist Behavioral Health & Social Service Providers · License PY5535 (FL) Primary

Authorized official

Name Donna Greifer
Title Licensed Psychologist Owner
Phone (305) 987-0170

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

How current is this record?
Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2011-09-02. Verify at npiregistry.cms.hhs.gov.
Where is Donna Greifer LLC located?
The practice location on file with NPPES is in Altamonte Springs, FL.

Providers at this address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-09-02.