Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Gary Craig Mertz, SLP

Q: What is the NPI number for Gary Mertz?

The National Provider Identifier (NPI) for Gary Mertz is 1205906534, a Type 1 (individual) record in the CMS NPPES registry.

Speech-Language Pathologist in Waynesboro, PA · enumerated 2006 · practices at Flagship Rehabilitation, Inc.

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

National Provider Identifier

1205906534

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Registry record

Entity type Individual (Type 1)

Name Mr. Gary Craig Mertz

Credential SLP

Sex Male

Practice address 120 W Main St, Waynesboro, PA, 17268

Phone (814) 977-8339

Enumeration date Nov 8, 2006

Last updated in NPPES Dec 4, 2019

Taxonomy & licenses

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers · License 2202004610 (VA) Secondary

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers · License SL005045L (PA) Secondary

235Z00000X Speech-Language Pathologist Speech, Language and Hearing Service Providers · License 04723 (MD) Primary

SLP · Speech-Language Pathologist: A licensed clinician treating speech, language, and swallowing disorders. About the SLP 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.

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Frequently asked questions

What is the NPI number for Gary Mertz?

The National Provider Identifier (NPI) for Gary Mertz is 1205906534, a Type 1 (individual) record in the CMS NPPES registry.

Where does Gary Mertz practice?

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

Other providers at this practice address

Browse all →

Allison Frey Occupational Therapist · Waynesboro, PA NPI 1013485010 Kristen O'Brien Occupational Therapist · Waynesboro, PA NPI 1326503236 Flagship Rehabilitation, Inc Physical Therapist · Waynesboro, PA NPI 1073164224 Andrea Peters Speech-Language Pathologist · Waynesboro, PA NPI 1609468750

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-12-04.