Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Arthur T Johnson IV, M.D.

Surgery Physician in Portsmouth, VA · enumerated 2011.

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

National Provider Identifier

1457642340

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Registry record

Entity type Individual (Type 1)

Name Dr. Arthur T Johnson IV

Credential M.D.

Sex Male

Practice address 4633 Mallard Cres, Portsmouth, VA, 23703

Phone (757) 953-2507

Enumeration date Apr 26, 2011

Last updated in NPPES Apr 29, 2019

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 57582 (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

How do I verify Arthur Johnson's NPI record?

Cross-check NPI 1457642340 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1457642340 active?

Yes, as of the latest NPPES snapshot, NPI 1457642340 is active (record last updated 2019-04-29).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-04-29.