Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Alexander Michael Johnston, M.D.

Surgery Physician in Winchester, VA · enumerated 2013 · practices at Valley Physician Enterprise, Inc..

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

National Provider Identifier

1356785604

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Registry record

Entity type Individual (Type 1)

Name Dr. Alexander Michael Johnston

Credential M.D.

Sex Male

Practice address Winchester, VA, 22601

Phone (540) 536-0130

Fax (540) 536-0140

Enumeration date Apr 17, 2013

Last updated in NPPES Jun 10, 2021

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

208600000X Surgery Physician Allopathic & Osteopathic Physicians · License 0101266985 (VA) Primary

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

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
0101266985	Other	VA	STATE LICENSE

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 Alexander Johnston's NPI record?

Cross-check NPI 1356785604 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1356785604 active?

Yes, as of the latest NPPES snapshot, NPI 1356785604 is active (record last updated 2021-06-10).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-06-10.