Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. John N Alexander, D.C., B.S.
Chiropractor in New York, NY · enumerated 2013.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1124368147
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Registry record
Entity type Individual (Type 1)
Name Dr. John N Alexander
Credential D.C., B.S.
Sex Male
Practice address 12 W 21st St Fl 2, New York, NY, 10010
Phone (646) 484-5763
Enumeration date Feb 28, 2013
Last updated in NPPES Mar 17, 2018
Taxonomy & licenses
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.
Frequently asked questions
Where does John Alexander practice?
The practice location on file with NPPES is in New York, NY. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for John Alexander?
The National Provider Identifier (NPI) for John Alexander is 1124368147, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-03-17.