NPI Portal NPI Lookup & Verification

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

Mr. Clark Gregory Byrer, L.C.P.C.

Professional Counselor in Portland, ME · enumerated 2009.

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

National Provider Identifier

1699913186

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Registry record

Entity type Individual (Type 1)
Name Mr. Clark Gregory Byrer
Credential L.C.P.C.
Sex Male
Practice address Portland, ME, 04101
Phone (207) 772-7532
Fax (207) 772-2670
Enumeration date Jan 22, 2009
Last updated in NPPES Jan 22, 2009

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

Taxonomy & licenses

101YP2500X Professional Counselor Behavioral Health & Social Service Providers · License CC960 (ME) 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

What is the NPI number for Clark Byrer?
The National Provider Identifier (NPI) for Clark Byrer is 1699913186, a Type 1 (individual) record in the CMS NPPES registry.
Where does Clark Byrer practice?
The practice location on file with NPPES is in Portland, ME. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-01-22.