Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Leonard Kaplan, MD

Infectious Disease Physician in Glenview, IL · enumerated 2005.

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

National Provider Identifier

1386630390

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Registry record

Entity type Individual (Type 1)

Name Dr. Leonard Kaplan

Credential MD

Sex Male

Practice address 2150 Pfingsten Rd, Suite B100, Glenview, IL, 60026

Phone (847) 657-5959

Fax (847) 657-5764

Enumeration date Sep 26, 2005

Last updated in NPPES Oct 13, 2020

Taxonomy & licenses

207RI0200X Infectious Disease Physician Allopathic & Osteopathic Physicians · License 036-076528 (IL) 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

What is the NPI number for Leonard Kaplan?

The National Provider Identifier (NPI) for Leonard Kaplan is 1386630390, a Type 1 (individual) record in the CMS NPPES registry.

Where does Leonard Kaplan practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-10-13.