| M66.30 | Spontaneous rupture of flexor tendons, unspecified site | BILLABLE CODE |
| M66.31 | Spontaneous rupture of flexor tendons, shoulder | NON-BILLABLE CODE |
| M66.311 | Spontaneous rupture of flexor tendons, right shoulder | BILLABLE CODE |
| M66.312 | Spontaneous rupture of flexor tendons, left shoulder | BILLABLE CODE |
| M66.319 | Spontaneous rupture of flexor tendons, unspecified shoulder | BILLABLE CODE |
| M66.32 | Spontaneous rupture of flexor tendons, upper arm | NON-BILLABLE CODE |
| M66.321 | Spontaneous rupture of flexor tendons, right upper arm | BILLABLE CODE |
| M66.322 | Spontaneous rupture of flexor tendons, left upper arm | BILLABLE CODE |
| M66.329 | Spontaneous rupture of flexor tendons, unspecified upper arm | BILLABLE CODE |
| M66.33 | Spontaneous rupture of flexor tendons, forearm | NON-BILLABLE CODE |
| M66.331 | Spontaneous rupture of flexor tendons, right forearm | BILLABLE CODE |
| M66.332 | Spontaneous rupture of flexor tendons, left forearm | BILLABLE CODE |
| M66.339 | Spontaneous rupture of flexor tendons, unspecified forearm | BILLABLE CODE |
| M66.34 | Spontaneous rupture of flexor tendons, hand | NON-BILLABLE CODE |
| M66.341 | Spontaneous rupture of flexor tendons, right hand | BILLABLE CODE |
| M66.342 | Spontaneous rupture of flexor tendons, left hand | BILLABLE CODE |
| M66.349 | Spontaneous rupture of flexor tendons, unspecified hand | BILLABLE CODE |
| M66.35 | Spontaneous rupture of flexor tendons, thigh | NON-BILLABLE CODE |
| M66.351 | Spontaneous rupture of flexor tendons, right thigh | BILLABLE CODE |
| M66.352 | Spontaneous rupture of flexor tendons, left thigh | BILLABLE CODE |
| M66.359 | Spontaneous rupture of flexor tendons, unspecified thigh | BILLABLE CODE |
| M66.36 | Spontaneous rupture of flexor tendons, lower leg | NON-BILLABLE CODE |
| M66.361 | Spontaneous rupture of flexor tendons, right lower leg | BILLABLE CODE |
| M66.362 | Spontaneous rupture of flexor tendons, left lower leg | BILLABLE CODE |
| M66.369 | Spontaneous rupture of flexor tendons, unspecified lower leg | BILLABLE CODE |
| M66.37 | Spontaneous rupture of flexor tendons, ankle and foot | NON-BILLABLE CODE |
| M66.371 | Spontaneous rupture of flexor tendons, right ankle and foot | BILLABLE CODE |
| M66.372 | Spontaneous rupture of flexor tendons, left ankle and foot | BILLABLE CODE |
| M66.379 | Spontaneous rupture of flexor tendons, unspecified ankle and foot | BILLABLE CODE |
| M66.38 | Spontaneous rupture of flexor tendons, other site | BILLABLE CODE |
| M66.39 | Spontaneous rupture of flexor tendons, multiple sites | BILLABLE CODE |
