Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Darrell Knowlton, MSW

Social Worker in Michigan City, IN · enumerated 2008.

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

National Provider Identifier

1740433234

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Registry record

Entity type Individual (Type 1)

Name Darrell Knowlton

Credential MSW

Sex Male

Practice address 414 Butler St, Michigan City, IN, 46360

Phone (219) 879-0676

Enumeration date Oct 28, 2008

Last updated in NPPES Oct 28, 2008

Taxonomy & licenses

104100000X Social Worker 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

What is the NPI number for Darrell Knowlton?

The National Provider Identifier (NPI) for Darrell Knowlton is 1740433234, a Type 1 (individual) record in the CMS NPPES registry.

Where does Darrell Knowlton practice?

The practice location on file with NPPES is in Michigan City, IN. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-10-28.