Myositis ossificans traumatica, multiple sites

This code describes the development of heterotopic bone formation within muscle tissue following trauma, affecting multiple distinct anatomical sites. This condition is characterized by the ossification of soft tissues, typically muscle, after an injury, leading to a palpable mass and restricted range of motion.

Use this code when documentation clearly indicates myositis ossificans resulting from a traumatic event, and the condition is present in more than one body region. Supporting documentation should specify the traumatic etiology and identify all affected sites.

• Ensure the documentation explicitly states "multiple sites" or lists several distinct anatomical locations affected by myositis ossificans traumatica.
• Do not use this code for myositis ossificans that is not explicitly linked to trauma or for single-site involvement.
• Sequence this code as a primary diagnosis when it is the reason for the encounter, or as a secondary diagnosis if it is a co-morbidity impacting treatment.