Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Karen Mainzer, OTR L CHT

Hand Occupational Therapist in Bridgeton, MO · enumerated 2006.

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

National Provider Identifier

1649218066

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Registry record

Entity type Individual (Type 1)

Name Karen Mainzer

Credential OTR L CHT

Sex Female

Practice address 12468 St Charles Rock Road, Pro Rehab, Bridgeton, MO, 63044

Phone (314) 739-1123

Fax (314) 739-1173

Enumeration date Jun 4, 2006

Last updated in NPPES Aug 24, 2007

Taxonomy & licenses

225XH1200X Hand Occupational Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 2004000205 (MO) 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 Karen Mainzer?

The National Provider Identifier (NPI) for Karen Mainzer is 1649218066, a Type 1 (individual) record in the CMS NPPES registry.

Where does Karen Mainzer practice?

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

Other providers at this practice address

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Lori Meyer Physical Therapist · Bridgeton, MO NPI 1124129523

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-08-24.