NPI Portal NPI Lookup & Verification

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

Mr. Marc G Blair, L.I.S.W.

Clinical Social Worker in Solon, OH · enumerated 2006.

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

National Provider Identifier

1396758843

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Registry record

Entity type Individual (Type 1)
Name Mr. Marc G Blair
Credential L.I.S.W.
Sex Male
Practice address Solon, OH, 44139
Phone (216) 371-8621
Enumeration date Aug 15, 2006
Last updated in NPPES Jul 8, 2007

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

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License I. 0000801 (OH) 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.

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Frequently asked questions

Where does Marc Blair practice?
The practice location on file with NPPES is in Solon, OH. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Marc Blair?
The National Provider Identifier (NPI) for Marc Blair is 1396758843, a Type 1 (individual) record in the CMS NPPES registry.

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