Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. William S Folley, D.O.
Specialist in Knoxville, TN · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1538223326
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Registry record
Entity type Individual (Type 1)
Name Dr. William S Folley
Credential D.O.
Sex Male
Practice address 211 E Blount Ave, Suite 507, Knoxville, TN, 37920
Phone (865) 525-9414
Fax (865) 525-9452
Enumeration date Dec 19, 2006
Last updated in NPPES Jul 9, 2007
Taxonomy & licenses
DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD.
About the DO credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 3319598 | 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.
Frequently asked questions
What specialty is William Folley?
William Folley is registered in NPPES with the primary taxonomy of Specialist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
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.
Other providers at this practice address
Browse all → Douglas Holland Emergency Medicine Physician · Knoxville, TN NPI 1184787855 Michael Phillips Specialist · Knoxville, TN NPI 1437212842 Erik Geibig Emergency Medicine Physician · Knoxville, TN NPI 1578626065 Stephen Russell Emergency Medicine Physician · Knoxville, TN NPI 1942363379 Family Care of East Tn, Pllc Family Medicine Physician · Knoxville, TN NPI 1710009956 Spirit Prosthetics Amputee Clinic/Center · Knoxville, TN NPI 1992976013
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-09.