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William Charles O'Neill IV, MD

Nephrology Physician in Atlanta, GA · enumerated 2006.

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

National Provider Identifier

1215049648

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Registry record

Entity type Individual (Type 1)
Name William Charles O'Neill IV
Credential MD
Sex Male
Practice address 1365 Clifton Rd Ne Bldg B, The Emory Clinic - Nephrology, Atlanta, GA, 30322
Phone (404) 778-4366
Enumeration date Aug 31, 2006
Last updated in NPPES Mar 29, 2013

Taxonomy & licenses

207RN0300X Nephrology Physician Allopathic & Osteopathic Physicians · License 28056 (GA) 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.

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Frequently asked questions

What is the NPI number for William O'Neill?
The National Provider Identifier (NPI) for William O'Neill is 1215049648, a Type 1 (individual) record in the CMS NPPES registry.
Where does William O'Neill practice?
The practice location on file with NPPES is in Atlanta, GA. Providers can have multiple locations; NPPES lists the primary practice address.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-03-29.