ICD-10 Code M01.X49 – Direct infection of unspecified hand in infectious and parasitic diseases classified elsewhere (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M01.X49 – Direct infection of unspecified hand in infectious and parasitic diseases classified elsewhere
What it is
This code identifies a direct infectious process affecting the hand when the underlying infectious or parasitic disease is classified elsewhere. Use it when the hand involvement is documented as secondary to another specified infection.
Clinical signs
Clinical features vary; refer to documentation. Typical findings may include localized pain, swelling, warmth, redness, and reduced hand motion, but the record should link the hand infection to the underlying disease.
When to use this code
Use this code when the provider documents direct infection of the unspecified hand and names an underlying infectious or parasitic condition coded elsewhere. It fits cases where the hand is the affected site, but the primary disease is the reason for classification. You should confirm laterality or a more specific hand site if documented.
Do not use for
Do not use this code for nonspecific hand pain, trauma, or cellulitis without documentation of an infection classified elsewhere. Check documentation if the infection is not clearly linked to an underlying infectious or parasitic disease.
Coding tip
Always code the underlying infectious or parasitic condition first, then assign M01.X49 only when the hand infection is explicitly documented as secondary.