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Dr. Joon S Ahn, M.D.

Orthopaedic Hand Surgery Physician in Mount Vernon, IL · enumerated 2006.

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

National Provider Identifier

1083681027

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Registry record

Entity type Individual (Type 1)
Name Dr. Joon S Ahn
Credential M.D.
Sex Male
Practice address 4121 Veterans Memorial Dr, Mount Vernon, IL, 62864
Phone (618) 242-3778
Fax (618) 242-2551
Enumeration date Mar 8, 2006
Last updated in NPPES Jul 9, 2007

Taxonomy & licenses

207XS0106X Orthopaedic Hand Surgery Physician Allopathic & Osteopathic Physicians · License 036104840 (IL) 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
036104840 Medicaid IL -

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 Joon Ahn practice?
The practice location on file with NPPES is in Mount Vernon, IL. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Joon Ahn?
The National Provider Identifier (NPI) for Joon Ahn is 1083681027, 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 2007-07-09.