M91.3 is a "category code," which means it's non-billable. Billable codes require more specificity. Use the list below to navigate to codes that are more specific:
10
M91.30
Pseudocoxalgia, unspecified hip
Billable
10
M91.31
Pseudocoxalgia, right hip
Billable
10
M91.32
Pseudocoxalgia, left hip
Billable