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

Catherine Hammer, MFT

Mental Health Counselor in Garnet Valley, PA · enumerated 2010.

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

National Provider Identifier

1730410648

Verified

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Registry record

Entity type Individual (Type 1)

Name Catherine Hammer

Credential MFT

Sex Female

Practice address Garnet Valley, PA, 19060

Phone (484) 832-2789

Enumeration date Jan 18, 2010

Last updated in NPPES Jan 18, 2010

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

Taxonomy & licenses

101YM0800X Mental Health Counselor 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 Catherine Hammer?

The National Provider Identifier (NPI) for Catherine Hammer is 1730410648, a Type 1 (individual) record in the CMS NPPES registry.

Where does Catherine Hammer practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-01-18.