Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William C. Lindsay, M.D.

Clinical Cardiac Electrophysiology Physician in Knoxville, TN · enumerated 2005.

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

National Provider Identifier

1083604623

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Registry record

Entity type Individual (Type 1)

Name Dr. William C. Lindsay

Credential M.D.

Sex Male

Practice address 10800 Parkside Dr, Suite 331, Knoxville, TN, 37934

Phone (865) 392-3400

Fax (865) 392-3449

Enumeration date Oct 25, 2005

Last updated in NPPES Jan 21, 2019

Taxonomy & licenses

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 19778 (TN) Secondary

207RC0001X Clinical Cardiac Electrophysiology Physician Allopathic & Osteopathic Physicians · License 19778 (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
64793946	Medicaid	KY	-
Q017553	Medicaid	TN	-

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 William Lindsay?

William Lindsay is registered in NPPES with the primary taxonomy of Clinical Cardiac Electrophysiology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

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Ravi Mehta Interventional Cardiology Physician · Knoxville, TN NPI 1669462230 Jacqueline S. Crawford, MD, Pllc Neurology Physician · Knoxville, TN NPI 1649209321 Jacqueline Crawford Neurology Physician · Knoxville, TN NPI 1124058532 Lisa Buckingham Obstetrics & Gynecology Physician · Knoxville, TN NPI 1205083060 Comprehensive Neurology Services Pllc Neurology Physician · Knoxville, TN NPI 1124356746 Kelsey Lenihan Adult Health Nurse Practitioner · Knoxville, TN NPI 1295084028

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-01-21.