Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Forrest E Diehl, L.P.C.C.

Counselor in Ashtabula, OH · enumerated 2005.

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

National Provider Identifier

1164420865

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Registry record

Entity type Individual (Type 1)

Name Mr. Forrest E Diehl

Credential L.P.C.C.

Sex Male

Practice address 1907 Aetna Rd, Ashtabula, OH, 44004

Phone (440) 992-7565

Fax (440) 257-7997

Enumeration date Jul 7, 2005

Last updated in NPPES Jul 13, 2026

Taxonomy & licenses

101Y00000X Counselor Behavioral Health & Social Service Providers · License E1439 (OH) 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 1164420865 active?

Yes, as of the latest NPPES snapshot, NPI 1164420865 is active (record last updated 2026-07-13).

How do I verify Forrest Diehl's NPI record?

Cross-check NPI 1164420865 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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