Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Onyema Nnanna, M.D.

Hospitalist Physician in Chesterfield, MO · enumerated 2016.

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

National Provider Identifier

1164872768

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Registry record

Entity type Individual (Type 1)

Name Onyema Nnanna

Credential M.D.

Sex Male

Practice address 222 S Woods Mill Rd, Chesterfield, MO, 63017

Phone (314) 205-6050

Fax (314) 434-5939

Enumeration date Jun 15, 2016

Last updated in NPPES Oct 14, 2024

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 2019023516 (MO) Secondary

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License 2019023516 (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

What is the NPI number for Onyema Nnanna?

The National Provider Identifier (NPI) for Onyema Nnanna is 1164872768, a Type 1 (individual) record in the CMS NPPES registry.

Where does Onyema Nnanna practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-10-14.