Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Carl Leonhardt, DO

Emergency Medicine Physician in Olympia Fields, IL · enumerated 2015.

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

National Provider Identifier

1548647324

Verified

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Registry record

Entity type Individual (Type 1)

Name Carl Leonhardt

Credential DO

Sex Male

Practice address 20201 Crawford Ave, Olympia Fields, IL, 60461

Phone (708) 747-4000

Enumeration date Apr 30, 2015

Last updated in NPPES Jan 9, 2025

Taxonomy & licenses

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 007960 (AZ) Secondary

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 02005492A (IN) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO 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 Carl Leonhardt?

The National Provider Identifier (NPI) for Carl Leonhardt is 1548647324, a Type 1 (individual) record in the CMS NPPES registry.

Where does Carl Leonhardt practice?

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

Other providers at this practice address

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Alverno Lakeside Corporation Ambulance · Olympia Fields, IL NPI 1124021266 Kalisha Hill Anatomic Pathology & Clinical Pathology Physician · Olympia Fields, IL NPI 1851384754 Mark Fritsch Anatomic Pathology & Clinical Pathology Physician · Olympia Fields, IL NPI 1467445361 Mark Vangorder Anatomic Pathology & Clinical Pathology Physician · Olympia Fields, IL NPI 1053304956 Consultants in Pathology Sc Anatomic Pathology & Clinical Pathology Physician · Olympia Fields, IL NPI 1023001914 John Kasimos Anatomic Pathology & Clinical Pathology Physician · Olympia Fields, IL NPI 1295728194 Jehanzeb Sheikh Hospitalist Physician · Olympia Fields, IL NPI 1720066244 Quinn Biggs Health Service Psychologist · Olympia Fields, IL NPI 1477524155

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-01-09.