Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Erik Messamore, M.D.

Psychiatry Physician in Mason, OH · enumerated 2006.

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

National Provider Identifier

1366552606

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Registry record

Entity type Individual (Type 1)

Name Dr. Erik Messamore

Credential M.D.

Sex Male

Practice address 4075 Old Western Row Rd, Lindner Center of Hope, Mason, OH, 45040

Phone (513) 536-0603

Fax (513) 536-0459

Enumeration date Aug 30, 2006

Last updated in NPPES Jan 24, 2014

Taxonomy & licenses

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License MD21197 (OR) Secondary

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 35.122700 (OH) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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 Erik Messamore?

The National Provider Identifier (NPI) for Erik Messamore is 1366552606, a Type 1 (individual) record in the CMS NPPES registry.

Where does Erik Messamore practice?

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

Other providers at this practice address

Browse all →

Carol Dewald Adult Psychiatric/Mental Health Clinical Nurse Specialist · Mason, OH NPI 1891793220 Chris Tuell Professional Counselor · Mason, OH NPI 1508840778 William Hartmann Psychiatry Physician · Mason, OH NPI 1255318408 Shannon Jensen Clinical Social Worker · Mason, OH NPI 1811963168 Robin Arthur Clinical Psychologist · Mason, OH NPI 1912961566 Nelson Rodriguez Psychiatry Physician · Mason, OH NPI 1710941018 Brett Dowdy Clinical Psychologist · Mason, OH NPI 1003854712 Jane Marasco Clinical Social Worker · Mason, OH NPI 1336181577

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-01-24.