Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Charles Keith Willis, M.D.

Neurology Physician in Greensboro, NC · enumerated 2006 · practices at Guilford Neurologic Associates, Inc..

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

National Provider Identifier

1427014497

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Registry record

Entity type Individual (Type 1)

Name Dr. Charles Keith Willis

Credential M.D.

Sex Male

Practice address 912 Third Street, Suite 101, Greensboro, NC, 27405

Phone (336) 273-2511

Fax (336) 370-0287

Enumeration date Apr 26, 2006

Last updated in NPPES Sep 17, 2021

Taxonomy & licenses

2084D0003X Diagnostic Neuroimaging (Psychiatry & Neurology) Physician Allopathic & Osteopathic Physicians · License 33768 (NC) Secondary

2084N0400X Neurology Physician Allopathic & Osteopathic Physicians · License 33768 (NC) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
130015016	Other	NC	PALMETTO GBA RR MEDICARE

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

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Charles Willis?

Charles Willis is registered in NPPES with the primary taxonomy of Neurology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-09-17.