Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Christopher Libby, PHD

Psychologist in Hartsdale, NY · enumerated 2008 · practices at Westchester Jewish Community Services Inc..

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

National Provider Identifier

1336301217

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Mr. Christopher Libby

Credential PHD

Sex Male

Practice address 141 N Central Ave, Hartsdale, NY, 10530

Phone (914) 949-7699

Fax (914) 949-3224

Enumeration date Jul 1, 2008

Last updated in NPPES Mar 27, 2023

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License 017798-1 (NY) Primary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential

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 1336301217 active?

Yes, as of the latest NPPES snapshot, NPI 1336301217 is active (record last updated 2023-03-27).

How do I verify Christopher Libby's NPI record?

Cross-check NPI 1336301217 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 2023-03-27.