NPI Portal NPI Lookup & Verification

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

Larry Oliver Chesser, MSW

Clinical Social Worker in Ada, OK · enumerated 2009 · practices at Primary Care of Ada, LLC.

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

National Provider Identifier

1245564954

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Larry Oliver Chesser
Credential MSW
Sex Male
Practice address Ada, OK, 74820
Phone (580) 310-9000
Enumeration date Sep 28, 2009
Last updated in NPPES Sep 28, 2009

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

Taxonomy & licenses

1041C0700X Clinical 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 Larry Chesser?
The National Provider Identifier (NPI) for Larry Chesser is 1245564954, a Type 1 (individual) record in the CMS NPPES registry.
Where does Larry Chesser practice?
The practice location on file with NPPES is in Ada, OK. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-09-28.