Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

David W Johnstone, M.D.

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in Milwaukee, WI · enumerated 2006.

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

National Provider Identifier

1366470627

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Registry record

Entity type Individual (Type 1)

Name David W Johnstone

Credential M.D.

Sex Male

Practice address 9200 W Wisconsin Ave, Thoracic Surgery, Milwaukee, WI, 53226

Phone (414) 955-6900

Fax (414) 955-6204

Enumeration date Jun 28, 2006

Last updated in NPPES Jan 22, 2013

Taxonomy & licenses

208G00000X Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Allopathic & Osteopathic Physicians · License 12427 (NH) Secondary

208G00000X Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Allopathic & Osteopathic Physicians · License 55565 (WI) 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
1010811	Medicaid	VT	-
1366470627	Medicaid	WI	-
30204582	Medicaid	NH	-

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.

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Frequently asked questions

Where does David Johnstone practice?

The practice location on file with NPPES is in Milwaukee, WI. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for David Johnstone?

The National Provider Identifier (NPI) for David Johnstone is 1366470627, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-01-22.