NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mr. Juan Carlos Diaz, CASAC

Addiction (Substance Use Disorder) Counselor in Freeport, NY · enumerated 2017.

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

National Provider Identifier

1952841397

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Mr. Juan Carlos Diaz
Credential CASAC
Sex Male
Practice address Freeport, NY, 11520
Phone (516) 546-2822
Fax (516) 546-5051
Enumeration date Mar 5, 2017
Last updated in NPPES Mar 5, 2017

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers · License 24671 (NY) 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

Is NPI 1952841397 active?
Yes, as of the latest NPPES snapshot, NPI 1952841397 is active (record last updated 2017-03-05).
How do I verify Juan Diaz's NPI record?
Cross-check NPI 1952841397 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-03-05.