Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. John Mark Williams, MD

Surgery Physician in Greenville, NC · enumerated 2005.

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

National Provider Identifier

1700869401

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. John Mark Williams

Credential MD

Sex Male

Practice address 115 Heart Dr, Greenville, NC, 27834

Phone (252) 744-4400

Fax (252) 744-3987

Enumeration date Nov 28, 2005

Last updated in NPPES Jul 9, 2025

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 29190 (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
87766	Other	NC	BCBS NC
8987766	Medicaid	NC	-
330004173	Other	NC	RAILROAD 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.

Read the full guide → Validate an NPI →

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 John Williams?

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

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-07-09.