Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Leonard Kristal, M.D.

Pediatric Dermatology Physician in East Setauket, NY · enumerated 2006.

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

National Provider Identifier

1871533810

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Registry record

Entity type Individual (Type 1)

Name Dr. Leonard Kristal

Credential M.D.

Sex Male

Practice address 181 N Belle Mead Rd, East Setauket, NY, 11733

Phone (631) 444-4200

Enumeration date Jun 7, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

207NP0225X Pediatric Dermatology Physician Allopathic & Osteopathic Physicians · License 183687 (NY) Primary

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

Other identifiers

Identifier	Type	State	Issuer
4564409	Other	NY	AETNA
70F19	Other	NY	EMPIRE BC/BS
01211072	Medicaid	NY	-

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

What is the NPI number for Leonard Kristal?

The National Provider Identifier (NPI) for Leonard Kristal is 1871533810, a Type 1 (individual) record in the CMS NPPES registry.

Where does Leonard Kristal practice?

The practice location on file with NPPES is in East Setauket, 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 2007-07-08.