NPI Portal NPI Lookup & Verification

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

Dr. John Mackenzie Keenan, D.C.

Chiropractor in Watertown, NY · enumerated 2008.

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

National Provider Identifier

1699944744

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Registry record

Entity type Individual (Type 1)
Name Dr. John Mackenzie Keenan
Credential D.C.
Sex Male
Practice address Watertown, NY, 13601
Phone (315) 788-5433
Fax (315) 788-5433
Enumeration date Feb 22, 2008
Last updated in NPPES Feb 22, 2008

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

Taxonomy & licenses

111N00000X Chiropractor Chiropractic Providers · License X005776-1 (NY) Primary
DC · Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC 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.

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Frequently asked questions

What is the NPI number for John Keenan?
The National Provider Identifier (NPI) for John Keenan is 1699944744, a Type 1 (individual) record in the CMS NPPES registry.
Where does John Keenan practice?
The practice location on file with NPPES is in Watertown, NY. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-02-22.