Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. John M Lacy, MD
Urology Physician in Knoxville, TN · enumerated 2010.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1538487939
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Dr. John M Lacy
Credential MD
Sex Male
Practice address 1928 Alcoa Hwy Ste B222, Knoxville, TN, 37920
Phone (865) 305-9254
Fax (865) 305-4589
Enumeration date May 10, 2010
Last updated in NPPES Jul 15, 2021
Taxonomy & licenses
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.
Frequently asked questions
Where does John Lacy practice?
The practice location on file with NPPES is in Knoxville, TN. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for John Lacy?
The National Provider Identifier (NPI) for John Lacy is 1538487939, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-07-15.