Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John-Tyler Markette, COUNSELING

Professional Counselor in New Haven, CT · enumerated 2019.

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

National Provider Identifier

1801438981

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Registry record

Entity type Individual (Type 1)

Name John-Tyler Markette

Credential COUNSELING

Sex Male

Practice address 62 Grant Street, Grant Street Partnership, New Haven, CT, 06519

Phone (203) 503-3350

Fax (203) 503-3370

Enumeration date Oct 10, 2019

Last updated in NPPES Oct 10, 2019

Taxonomy & licenses

101YP2500X Professional Counselor Behavioral Health & Social Service Providers 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 John-Tyler Markette practice?

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

What is the NPI number for John-Tyler Markette?

The National Provider Identifier (NPI) for John-Tyler Markette is 1801438981, 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 2019-10-10.