Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dennis Dillon, PA

Physician Assistant in West Islip, NY · enumerated 2006.

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

National Provider Identifier

1578661195

Verified

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Registry record

Entity type Individual (Type 1)

Name Dennis Dillon

Credential PA

Sex Male

Practice address 400 Montauk Hwy, Suite 108, West Islip, NY, 11795

Phone (631) 482-9192

Fax (631) 482-9195

Enumeration date Sep 20, 2006

Last updated in NPPES Jan 15, 2021

Taxonomy & licenses

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 006337 (NY) Secondary

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 006337 (NY) Primary

PA · Physician Assistant: A licensed clinician who practices medicine in collaboration with physicians, trained in a graduate PA program. About the PA credential

Other identifiers

Identifier	Type	State	Issuer
970027340	Other	NY	RAILROAD MEDICARE

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 Dennis Dillon practice?

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

What is the NPI number for Dennis Dillon?

The National Provider Identifier (NPI) for Dennis Dillon is 1578661195, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-01-15.