Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William D Black, MD

Specialist in Knoxville, TN · enumerated 2005.

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

National Provider Identifier

1811999774

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Registry record

Entity type Individual (Type 1)

Name Dr. William D Black

Credential MD

Sex Male

Practice address 939 Emerald Ave, Suite 610, Knoxville, TN, 37917

Phone (865) 637-8635

Fax (865) 637-4821

Enumeration date Aug 11, 2005

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 6045 (TN) 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 William Black?

The National Provider Identifier (NPI) for William Black is 1811999774, a Type 1 (individual) record in the CMS NPPES registry.

Where does William Black practice?

The practice location on file with NPPES is in Knoxville, TN. 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 2007-07-08.