Paralytic calcification and ossification of muscle, l up arm

This code describes the pathological hardening of muscle tissue in the left upper arm due to the formation of calcium deposits and bone, specifically when this process is associated with paralysis. This condition can lead to restricted movement and pain in the affected limb.

Use this code for patients diagnosed with heterotopic ossification or myositis ossificans in the left upper arm that is directly linked to a paralytic condition. Documentation should clearly state the presence of calcification/ossification within the muscle and its association with paralysis.

• Ensure documentation specifies "left upper arm" to support this laterality and anatomical site.
• Distinguish from traumatic myositis ossificans (M61.0-) or other forms of calcification not associated with paralysis.
• Code any underlying paralytic condition separately, if applicable, following sequencing guidelines.