Calcification and ossification of muscle, unspecified

This code describes the abnormal hardening of muscle tissue due to the deposition of calcium salts or the formation of bone within the muscle. This process can lead to pain, stiffness, and reduced range of motion in the affected area. It represents a general diagnosis when the specific type of calcification or ossification is not documented.

Use this code when documentation indicates calcification or ossification of muscle, but the specific type (e.g., myositis ossificans traumatica, progressive osseous heteroplasia) is not specified. This code is appropriate when the provider has not provided further detail regarding the etiology or specific nature of the muscle hardening.

• Avoid using this code if a more specific code for muscle calcification or ossification (e.g., M61.0-M61.5) can be assigned based on documentation.
• Query the provider for clarification if the documentation mentions "muscle hardening" or "deposits in muscle" without further specificity.
• Consider sequencing this code after a code for the underlying cause or associated condition, if known and documented.