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Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Alan D. Johnston, MD

Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician in Orlando, FL · enumerated 2005.

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

National Provider Identifier

1083699037

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Registry record

Entity type Individual (Type 1)
Name Dr. Alan D. Johnston
Credential MD
Sex Male
Practice address 1400 S Orange Ave, Orlando, FL, 32806
Phone (407) 648-3800
Fax (407) 425-5203
Enumeration date Dec 13, 2005
Last updated in NPPES Apr 3, 2008

Taxonomy & licenses

208G00000X Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician Allopathic & Osteopathic Physicians · License ME30304 (FL) 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.

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Frequently asked questions

Is NPI 1083699037 active?
Yes, as of the latest NPPES snapshot, NPI 1083699037 is active (record last updated 2008-04-03).
How do I verify Alan Johnston's NPI record?
Cross-check NPI 1083699037 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-04-03.