Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. John Louis Mccarthy, MD

Emergency Medicine Physician in Uniondale, NY · enumerated 2006.

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

National Provider Identifier

1083636807

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Registry record

Entity type Individual (Type 1)

Name Dr. John Louis Mccarthy

Credential MD

Sex Male

Practice address 1345 Rxr Plaza, Uniondale, NY, 11556

Phone (516) 783-4600

Fax (516) 783-4612

Enumeration date Jul 24, 2006

Last updated in NPPES Jan 14, 2015

Taxonomy & licenses

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 214648 (NY) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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.

Read the full guide → Validate an NPI →

Frequently asked questions

Where does John Mccarthy practice?

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

What is the NPI number for John Mccarthy?

The National Provider Identifier (NPI) for John Mccarthy is 1083636807, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-01-14.