Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Robert Lee Knox Jr., M.D.

Gastroenterology Physician in Murfreesboro, TN · enumerated 2005.

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

National Provider Identifier

1457349425

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Robert Lee Knox Jr.

Credential M.D.

Sex Male

Practice address 1272 Garrison Dr, Murfreesboro, TN, 37129

Phone (615) 867-8070

Fax (615) 867-8073

Enumeration date Oct 12, 2005

Last updated in NPPES Jun 26, 2020

Taxonomy & licenses

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License 20879 (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
3082146	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.

Read the full guide → Validate an NPI →

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 Robert Knox?

Robert Knox is registered in NPPES with the primary taxonomy of Gastroenterology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-06-26.