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Leonard E Grosso, MD PHD

Immunopathology Physician in St Louis, MO · enumerated 2006.

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

National Provider Identifier

1548280969

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Registry record

Entity type Individual (Type 1)
Name Leonard E Grosso
Credential MD PHD
Sex Male
Practice address 1402 S Grand, St Louis, MO, 63110
Phone (314) 577-8693
Fax (314) 268-5478
Enumeration date Jul 20, 2006
Last updated in NPPES Mar 18, 2008

Taxonomy & licenses

207ZI0100X Immunopathology Physician Allopathic & Osteopathic Physicians · License R6J66 (MO) Primary
207ZP0007X Molecular Genetic Pathology (Pathology) Physician Allopathic & Osteopathic Physicians · License R6J66 (MO) Secondary

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 Leonard Grosso practice?
The practice location on file with NPPES is in St Louis, MO. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Leonard Grosso?
The National Provider Identifier (NPI) for Leonard Grosso is 1548280969, 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 2008-03-18.