Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Mark D Hammerly, PH.D.

Clinical Psychologist in Liberty Township, OH · enumerated 2015.

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

National Provider Identifier

1144604174

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark D Hammerly

Credential PH.D.

Sex Male

Practice address 7999 Trinity Shore Cir, Liberty Township, OH, 45044

Phone (513) 779-2906

Fax (513) 779-2906

Enumeration date Jul 20, 2015

Last updated in NPPES Jun 21, 2016

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License 6049 (OH) Secondary

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 6049 (OH) Primary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD 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 Mark Hammerly?

The National Provider Identifier (NPI) for Mark Hammerly is 1144604174, a Type 1 (individual) record in the CMS NPPES registry.

Where does Mark Hammerly practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-06-21.