M66.261
BillableSpontaneous rupture of extensor tendons, right lower leg
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
A sudden, unexpected tearing of the extensor tendons (muscles that straighten the foot and toes) in the right lower leg, occurring without a specific injury.
Coding Tips
- •Verify laterality is documented as right; if not specified, use M66.269 instead
- •This code indicates spontaneous rupture, so confirm there was no traumatic event documented
Code Hierarchy
└M66Spontaneous rupture of synovium and tendon└M66.2Spontaneous rupture of extensor tendons└M66.26Spontaneous rupture of extensor tendons, lower leg└M66.261Spontaneous rupture of extensor tendons, right lower leg
└M66.261Spontaneous rupture of extensor tendons, right lower leg