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Daniel Leonard, DO

Critical Care Medicine (Internal Medicine) Physician in Rockford, IL · enumerated 2009.

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

National Provider Identifier

1366671489

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Registry record

Entity type Individual (Type 1)
Name Daniel Leonard
Credential DO
Sex Male
Practice address 1340 Charles St Ste 405, Rockford, IL, 61104
Phone (779) 696-6102
Fax (779) 696-6026
Enumeration date Jul 10, 2009
Last updated in NPPES May 15, 2026

Taxonomy & licenses

207RP1001X Pulmonary Disease Physician Allopathic & Osteopathic Physicians · License 036-131017 (IL) Secondary
207RP1001X Pulmonary Disease Physician Allopathic & Osteopathic Physicians · License 64155 (WI) Secondary
207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 036-131017 (IL) Secondary
207RC0200X Critical Care Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians · License 036-131017 (IL) 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

Other identifiers

Identifier Type State Issuer
64155 Other WI STATE LICENSE
036-131017 Other IL STATE LICENSE
125057108 Other IL STATE LICENSE

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 Daniel Leonard practice?
The practice location on file with NPPES is in Rockford, IL. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Daniel Leonard?
The National Provider Identifier (NPI) for Daniel Leonard is 1366671489, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-05-15.