NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark Johnson, MD

General Practice Physician in Brentwood, TN · enumerated 2018.

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

National Provider Identifier

1427528546

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Mark Johnson
Credential MD
Sex Male
Practice address 278 Franklin Rd Ste 150, Brentwood, TN, 37027
Phone (615) 506-0536
Enumeration date Dec 1, 2018
Last updated in NPPES Dec 1, 2018

Taxonomy & licenses

208800000X Urology Physician Allopathic & Osteopathic Physicians · License 20344 (TN) Secondary
208D00000X General Practice Physician Allopathic & Osteopathic Physicians · License 20344 (TN) Primary
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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Mark Johnson?
The National Provider Identifier (NPI) for Mark Johnson is 1427528546, a Type 1 (individual) record in the CMS NPPES registry.
Where does Mark Johnson practice?
The practice location on file with NPPES is in Brentwood, TN. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-12-01.