ICD-10 Code M01.X1 – Direct infection of shoulder joint in infectious and parasitic diseases classified elsewhere (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M01.X1 – Direct infection of shoulder joint in infectious and parasitic diseases classified elsewhere
What it is
This code identifies a shoulder joint infection that occurs as part of another infectious or parasitic disease. Use it when the shoulder is directly affected, and the underlying cause is coded elsewhere.
Clinical signs
Typical findings include shoulder pain, swelling, warmth, reduced range of motion, and joint tenderness. Clinical features vary; refer to documentation for evidence that the infection involves the shoulder joint.
When to use this code
Use M01.X1 when the record states direct infection of the shoulder joint secondary to an infectious or parasitic disease classified elsewhere. Code the underlying condition first when documentation supports it. Confirm that the shoulder, not surrounding soft tissue, is the infected site.
Do not use for
Do not use this code for septic arthritis without a documented infectious or parasitic disease classified elsewhere. Also avoid it when the problem is limited to bursitis, cellulitis, or an unspecified shoulder infection. Check documentation.
Coding tip
Verify the causative disease and the exact joint site before assigning M01.X1.