| M66 | Spontaneous rupture of synovium and tendon | NON-BILLABLE CODE |
| M66.0 | Rupture of popliteal cyst | BILLABLE CODE |
| M66.1 | Rupture of synovium | NON-BILLABLE CODE |
| M66.10 | Rupture of synovium, unspecified joint | BILLABLE CODE |
| M66.11 | Rupture of synovium, shoulder | NON-BILLABLE CODE |
| M66.111 | Rupture of synovium, right shoulder | BILLABLE CODE |
| M66.112 | Rupture of synovium, left shoulder | BILLABLE CODE |
| M66.119 | Rupture of synovium, unspecified shoulder | BILLABLE CODE |
| M66.12 | Rupture of synovium, elbow | NON-BILLABLE CODE |
| M66.121 | Rupture of synovium, right elbow | BILLABLE CODE |
| M66.122 | Rupture of synovium, left elbow | BILLABLE CODE |
| M66.129 | Rupture of synovium, unspecified elbow | BILLABLE CODE |
| M66.13 | Rupture of synovium, wrist | NON-BILLABLE CODE |
| M66.131 | Rupture of synovium, right wrist | BILLABLE CODE |
| M66.132 | Rupture of synovium, left wrist | BILLABLE CODE |
| M66.139 | Rupture of synovium, unspecified wrist | BILLABLE CODE |
| M66.14 | Rupture of synovium, hand and fingers | NON-BILLABLE CODE |
| M66.141 | Rupture of synovium, right hand | BILLABLE CODE |
| M66.142 | Rupture of synovium, left hand | BILLABLE CODE |
| M66.143 | Rupture of synovium, unspecified hand | BILLABLE CODE |
| M66.144 | Rupture of synovium, right finger(s) | BILLABLE CODE |
| M66.145 | Rupture of synovium, left finger(s) | BILLABLE CODE |
| M66.146 | Rupture of synovium, unspecified finger(s) | BILLABLE CODE |
| M66.15 | Rupture of synovium, hip | NON-BILLABLE CODE |
| M66.151 | Rupture of synovium, right hip | BILLABLE CODE |
| M66.152 | Rupture of synovium, left hip | BILLABLE CODE |
| M66.159 | Rupture of synovium, unspecified hip | BILLABLE CODE |
| M66.17 | Rupture of synovium, ankle, foot and toes | NON-BILLABLE CODE |
| M66.171 | Rupture of synovium, right ankle | BILLABLE CODE |
| M66.172 | Rupture of synovium, left ankle | BILLABLE CODE |
| M66.173 | Rupture of synovium, unspecified ankle | BILLABLE CODE |
| M66.174 | Rupture of synovium, right foot | BILLABLE CODE |
| M66.176 | Rupture of synovium, unspecified foot | BILLABLE CODE |
| M66.177 | Rupture of synovium, right toe(s) | BILLABLE CODE |
| M66.178 | Rupture of synovium, left toe(s) | BILLABLE CODE |
| M66.179 | Rupture of synovium, unspecified toe(s) | BILLABLE CODE |
| M66.18 | Rupture of synovium, other site | BILLABLE CODE |
| M66.2 | Spontaneous rupture of extensor tendons | NON-BILLABLE CODE |
| M66.20 | Spontaneous rupture of extensor tendons, unspecified site | BILLABLE CODE |
| M66.21 | Spontaneous rupture of extensor tendons, shoulder | NON-BILLABLE CODE |
| M66.211 | Spontaneous rupture of extensor tendons, right shoulder | BILLABLE CODE |
| M66.212 | Spontaneous rupture of extensor tendons, left shoulder | BILLABLE CODE |
| M66.219 | Spontaneous rupture of extensor tendons, unspecified shoulder | BILLABLE CODE |
| M66.22 | Spontaneous rupture of extensor tendons, upper arm | NON-BILLABLE CODE |
| M66.221 | Spontaneous rupture of extensor tendons, right upper arm | BILLABLE CODE |
| M66.222 | Spontaneous rupture of extensor tendons, left upper arm | BILLABLE CODE |
| M66.229 | Spontaneous rupture of extensor tendons, unspecified upper arm | BILLABLE CODE |
| M66.23 | Spontaneous rupture of extensor tendons, forearm | NON-BILLABLE CODE |
| M66.231 | Spontaneous rupture of extensor tendons, right forearm | BILLABLE CODE |
| M66.232 | Spontaneous rupture of extensor tendons, left forearm | BILLABLE CODE |
| M66.239 | Spontaneous rupture of extensor tendons, unspecified forearm | BILLABLE CODE |
| M66.24 | Spontaneous rupture of extensor tendons, hand | NON-BILLABLE CODE |
| M66.241 | Spontaneous rupture of extensor tendons, right hand | BILLABLE CODE |
| M66.242 | Spontaneous rupture of extensor tendons, left hand | BILLABLE CODE |
| M66.249 | Spontaneous rupture of extensor tendons, unspecified hand | BILLABLE CODE |
| M66.25 | Spontaneous rupture of extensor tendons, thigh | NON-BILLABLE CODE |
| M66.251 | Spontaneous rupture of extensor tendons, right thigh | BILLABLE CODE |
| M66.252 | Spontaneous rupture of extensor tendons, left thigh | BILLABLE CODE |
| M66.259 | Spontaneous rupture of extensor tendons, unspecified thigh | BILLABLE CODE |
| M66.26 | Spontaneous rupture of extensor tendons, lower leg | NON-BILLABLE CODE |
| M66.261 | Spontaneous rupture of extensor tendons, right lower leg | BILLABLE CODE |
| M66.262 | Spontaneous rupture of extensor tendons, left lower leg | BILLABLE CODE |
| M66.269 | Spontaneous rupture of extensor tendons, unspecified lower leg | BILLABLE CODE |
| M66.27 | Spontaneous rupture of extensor tendons, ankle and foot | NON-BILLABLE CODE |
| M66.271 | Spontaneous rupture of extensor tendons, right ankle and foot | BILLABLE CODE |
| M66.272 | Spontaneous rupture of extensor tendons, left ankle and foot | BILLABLE CODE |
| M66.279 | Spontaneous rupture of extensor tendons, unspecified ankle and foot | BILLABLE CODE |
| M66.28 | Spontaneous rupture of extensor tendons, other site | BILLABLE CODE |
| M66.29 | Spontaneous rupture of extensor tendons, multiple sites | BILLABLE CODE |
| M66.3 | Spontaneous rupture of flexor tendons | NON-BILLABLE CODE |
| 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 |
| M66.8 | Spontaneous rupture of other tendons | NON-BILLABLE CODE |
| M66.80 | Spontaneous rupture of other tendons, unspecified site | BILLABLE CODE |
| M66.81 | Spontaneous rupture of other tendons, shoulder | NON-BILLABLE CODE |
| M66.811 | Spontaneous rupture of other tendons, right shoulder | BILLABLE CODE |
| M66.812 | Spontaneous rupture of other tendons, left shoulder | BILLABLE CODE |
| M66.819 | Spontaneous rupture of other tendons, unspecified shoulder | BILLABLE CODE |
| M66.82 | Spontaneous rupture of other tendons, upper arm | NON-BILLABLE CODE |
| M66.821 | Spontaneous rupture of other tendons, right upper arm | BILLABLE CODE |
| M66.822 | Spontaneous rupture of other tendons, left upper arm | BILLABLE CODE |
| M66.829 | Spontaneous rupture of other tendons, unspecified upper arm | BILLABLE CODE |
| M66.83 | Spontaneous rupture of other tendons, forearm | NON-BILLABLE CODE |
| M66.831 | Spontaneous rupture of other tendons, right forearm | BILLABLE CODE |
| M66.832 | Spontaneous rupture of other tendons, left forearm | BILLABLE CODE |
| M66.839 | Spontaneous rupture of other tendons, unspecified forearm | BILLABLE CODE |
| M66.84 | Spontaneous rupture of other tendons, hand | NON-BILLABLE CODE |
| M66.841 | Spontaneous rupture of other tendons, right hand | BILLABLE CODE |
| M66.842 | Spontaneous rupture of other tendons, left hand | BILLABLE CODE |
| M66.849 | Spontaneous rupture of other tendons, unspecified hand | BILLABLE CODE |
| M66.85 | Spontaneous rupture of other tendons, thigh | NON-BILLABLE CODE |
| M66.851 | Spontaneous rupture of other tendons, right thigh | BILLABLE CODE |
| M66.852 | Spontaneous rupture of other tendons, left thigh | BILLABLE CODE |
| M66.859 | Spontaneous rupture of other tendons, unspecified thigh | BILLABLE CODE |
| M66.86 | Spontaneous rupture of other tendons, lower leg | NON-BILLABLE CODE |
| M66.861 | Spontaneous rupture of other tendons, right lower leg | BILLABLE CODE |
| M66.862 | Spontaneous rupture of other tendons, left lower leg | BILLABLE CODE |
| M66.869 | Spontaneous rupture of other tendons, unspecified lower leg | BILLABLE CODE |
| M66.87 | Spontaneous rupture of other tendons, ankle and foot | NON-BILLABLE CODE |
| M66.871 | Spontaneous rupture of other tendons, right ankle and foot | BILLABLE CODE |
| M66.872 | Spontaneous rupture of other tendons, left ankle and foot | BILLABLE CODE |
| M66.879 | Spontaneous rupture of other tendons, unspecified ankle and foot | BILLABLE CODE |
| M66.88 | Spontaneous rupture of other tendons, other sites | BILLABLE CODE |
| M66.89 | Spontaneous rupture of other tendons, multiple sites | BILLABLE CODE |
| M66.9 | Spontaneous rupture of unspecified tendon | BILLABLE CODE |
