Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Leo A Whiteside, M.D.

Specialist in Saint Louis, MO · enumerated 2006.

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

National Provider Identifier

1134195621

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Registry record

Entity type Individual (Type 1)

Name Dr. Leo A Whiteside

Credential M.D.

Sex Male

Practice address 1000 Des Peres Rd, Suite 120, Saint Louis, MO, 63131

Phone (314) 205-2223

Fax (314) 628-5331

Enumeration date Feb 24, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

174400000X Specialist Other Service Providers · License R4328 (MO) 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

Where does Leo Whiteside practice?

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

What is the NPI number for Leo Whiteside?

The National Provider Identifier (NPI) for Leo Whiteside is 1134195621, a Type 1 (individual) record in the CMS NPPES registry.

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Thomas Panasci Internal Medicine Physician · Des Peres, MO NPI 1629051081 Regina Iman Adult Health Nurse Practitioner · Saint Louis, MO NPI 1477536456 Gregory Finn Pediatrics Physician · Saint Louis, MO NPI 1447223136 Joseph Hilgeman Internal Medicine Physician · Des Peres, MO NPI 1407820145 Adam Eaton Pediatrics Physician · Saint Louis, MO NPI 1366417750 Jennifer Arter Pediatrics Physician · Saint Louis, MO NPI 1164499000 Becky Shelton Obstetrics & Gynecology Physician · Saint Louis, MO NPI 1649248790 Delia Garcia Radiation Oncology Physician · Des Peres, MO NPI 1720016280

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.