Other biomechanical lesions of head region

This code signifies a functional impairment or structural abnormality within the head region that is not traumatic in origin and does not fit more specific biomechanical lesion categories. It encompasses conditions affecting the musculoskeletal and neurological systems of the head, such as cranial somatic dysfunctions or other non-inflammatory, non-infectious mechanical issues.

Use this code for diagnoses of biomechanical lesions of the head that are not otherwise specified or classifiable to more precise codes within the M99 series. Documentation should clearly indicate a mechanical or functional problem in the head, such as a cranial fault or restriction, without evidence of fracture, dislocation, or specific inflammatory processes.

• Always seek more specific M99 codes first if the documentation allows for greater precision regarding the type or location of the biomechanical lesion.
• Ensure documentation explicitly states "biomechanical lesion" or similar terminology to support the use of this code.
• This code is often used in conjunction with codes for symptoms (e.g., headache, neck pain) if the biomechanical lesion is identified as the underlying cause.