Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Isaiah Joshua Terrell

Behavior Analyst in Sterling, VA · enumerated 2018.

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

National Provider Identifier

1639661523

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Registry record

Entity type Individual (Type 1)

Name Isaiah Joshua Terrell

Sex Male

Practice address 46040 Center Oak Plz Ste 150, Sterling, VA, 20166

Phone (703) 997-9494

Enumeration date Jun 6, 2018

Last updated in NPPES Jun 6, 2018

Taxonomy & licenses

103K00000X Behavior Analyst Behavioral Health & Social Service Providers 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 1639661523 active?

Yes, as of the latest NPPES snapshot, NPI 1639661523 is active (record last updated 2018-06-06).

How do I verify Isaiah Terrell's NPI record?

Cross-check NPI 1639661523 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-06-06.