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

Dr. Matthew Peter Liakos, M.D.

Interventional Cardiology Physician in West Islip, NY · enumerated 2011.

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

National Provider Identifier

1194004291

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Registry record

Entity type Individual (Type 1)

Name Dr. Matthew Peter Liakos

Credential M.D.

Sex Male

Practice address West Islip, NY, 11795

Phone (631) 669-2555

Enumeration date Aug 8, 2011

Last updated in NPPES Oct 6, 2020

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

Taxonomy & licenses

207RI0011X Interventional Cardiology Physician Allopathic & Osteopathic Physicians · License TP802 (KY) Secondary

207RI0011X Interventional Cardiology Physician Allopathic & Osteopathic Physicians · License 282839 (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 Matthew Liakos 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 Matthew Liakos?

The National Provider Identifier (NPI) for Matthew Liakos is 1194004291, 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 2020-10-06.