ICD-10 Code M01.X31 – Direct infection of right wrist in infectious and parasitic diseases classified elsewhere (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M01.X31 – Direct infection of right wrist in infectious and parasitic diseases classified elsewhere
What it is
This code identifies a direct infection involving the right wrist joint that occurs in the setting of an infectious or parasitic disease classified elsewhere. Use it when the wrist infection is documented as secondary to another underlying condition.
Clinical signs
Typical findings include wrist pain, swelling, warmth, reduced range of motion, and joint tenderness. Clinical features vary; refer to documentation for evidence that the infection specifically affects the right wrist.
When to use this code
Use M01.X31 when the record clearly states a direct infection of the right wrist linked to an infectious or parasitic disease elsewhere in the chart. You should also confirm that the right side is documented and that the infection is not coded as a separate primary joint disorder.
If the note only mentions suspected infection, an unspecified wrist, or a different joint, this code is not appropriate. Check documentation for the underlying causative disease and any additional codes required for that condition.
Do not use for
Do not use this code for traumatic wrist injury, nonspecific arthritis, or infection without right-wrist involvement. Check documentation if the provider has not linked the joint infection to an infectious or parasitic disease classified elsewhere.
Coding tip
Verify laterality and the underlying infection in the assessment before assigning M01.X31.