Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Mary Catherine Gegg, OT

Q: What is the NPI number for Mary Gegg?

The National Provider Identifier (NPI) for Mary Gegg is 1134525942, a Type 1 (individual) record in the CMS NPPES registry.

Pediatric Occupational Therapist in Wentzville, MO · enumerated 2014.

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

National Provider Identifier

1134525942

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Registry record

Entity type Individual (Type 1)

Name Mrs. Mary Catherine Gegg

Credential OT

Sex Female

Practice address 601 N. Carr Street, Wentzville, MO, 63385

Phone (636) 327-3839

Fax (314) 431-5640

Enumeration date Nov 6, 2014

Last updated in NPPES Jan 28, 2022

Taxonomy & licenses

225XP0200X Pediatric Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 2014026023 (MO) Primary

OT · Occupational Therapist: A licensed therapist helping patients develop or recover skills for daily living and working. About the OT credential

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 Mary Gegg?

The National Provider Identifier (NPI) for Mary Gegg is 1134525942, a Type 1 (individual) record in the CMS NPPES registry.

Where does Mary Gegg practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-01-28.