NPI Portal NPI Lookup & Verification

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

Joseph Blocker

Behavior Analyst in Sapulpa, OK · enumerated 2017.

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

National Provider Identifier

1558872838

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Registry record

Entity type Individual (Type 1)
Name Joseph Blocker
Sex Male
Practice address Sapulpa, OK, 74066
Phone (918) 219-4999
Enumeration date Oct 13, 2017
Last updated in NPPES Oct 13, 2017

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

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.

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Frequently asked questions

How do I verify Joseph Blocker's NPI record?
Cross-check NPI 1558872838 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1558872838 active?
Yes — as of the latest NPPES snapshot, NPI 1558872838 is active (record last updated 2017-10-13).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-10-13.