NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William E. Johnson, MD

Diagnostic Radiology Physician in Duluth, MN · enumerated 2007.

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

National Provider Identifier

1174670186

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. William E. Johnson
Credential MD
Sex Male
Practice address 925 E Superior St, Suite109, Duluth, MN, 55802
Phone (218) 722-3700
Fax (218) 722-8705
Enumeration date Jan 4, 2007
Last updated in NPPES Oct 13, 2011

Taxonomy & licenses

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 25023 (MN) 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 William Johnson?
The National Provider Identifier (NPI) for William Johnson is 1174670186, a Type 1 (individual) record in the CMS NPPES registry.
Where does William Johnson practice?
The practice location on file with NPPES is in Duluth, MN. 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 2011-10-13.