Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William Carl Dyer Jr., M.D.

Orthopaedic Surgery Physician in Chattanooga, TN · enumerated 2006.

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

National Provider Identifier

1891764874

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Registry record

Entity type Individual (Type 1)

Name Dr. William Carl Dyer Jr.

Credential M.D.

Sex Male

Practice address 1301 Mccallie Ave, Chattanooga, TN, 37404

Phone (423) 266-1808

Fax (423) 266-1800

Enumeration date Mar 14, 2006

Last updated in NPPES Jun 25, 2025

Taxonomy & licenses

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 0000005404 (TN) 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
015248	Other	GA	GEORGIA STATE LISCENSE
2005642	Other	TN	BLUE CROSS BLUE SHIELD
MD0000005405	Other	TN	LISCENSE

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

How do I verify William Dyer's NPI record?

Cross-check NPI 1891764874 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1891764874 active?

Yes, as of the latest NPPES snapshot, NPI 1891764874 is active (record last updated 2025-06-25).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-06-25.