M66 | 
		  | 
		Spontaneous rupture of synovium and tendon   | 
	
	
		 |  | 
		
	
		| Includes | 
		rupture that occurs when a normal force is applied to tissues that are inferred to have less than normal strength
  | 
	 
	
		| Excludes2 | 
		rotator cuff syndrome (M75.1-) rupture where an abnormal force is applied to normal tissue - see injury of tendon by body region
  | 
	 
 
 | 
	
 |  | 
	
		 M66.0 | 
		 | 
		Rupture of popliteal cyst | 
	 
  | 
 |  | 
	
		 M66.1 | 
		  | 
		Rupture of synovium | 
	 
	
		 |  | 
		
| Rupture of synovial cyst |  	
		| Excludes2 | 
		rupture of popliteal cyst (M66.0)
  | 
	 
 
 | 
	  |  | 
	
		 M66.10 | 
		 | 
		Rupture of synovium, unspecified joint | 
	 
  |   |  | 
	
		 M66.11 | 
		 | 
		Rupture of synovium, shoulder | 
	 
 |  | 
	
		 M66.111 | 
		 | 
		Rupture of synovium, right shoulder | 
	 
  |   |  | 
	
		 M66.112 | 
		 | 
		Rupture of synovium, left shoulder | 
	 
  |   |  | 
	
		 M66.119 | 
		 | 
		Rupture of synovium, unspecified shoulder | 
	 
  |    |   |  | 
	
		 M66.12 | 
		 | 
		Rupture of synovium, elbow | 
	 
 |  | 
	
		 M66.121 | 
		 | 
		Rupture of synovium, right elbow | 
	 
  |   |  | 
	
		 M66.122 | 
		 | 
		Rupture of synovium, left elbow | 
	 
  |   |  | 
	
		 M66.129 | 
		 | 
		Rupture of synovium, unspecified elbow | 
	 
  |    |   |  | 
	
		 M66.13 | 
		 | 
		Rupture of synovium, wrist | 
	 
 |  | 
	
		 M66.131 | 
		 | 
		Rupture of synovium, right wrist | 
	 
  |   |  | 
	
		 M66.132 | 
		 | 
		Rupture of synovium, left wrist | 
	 
  |   |  | 
	
		 M66.139 | 
		 | 
		Rupture of synovium, unspecified wrist | 
	 
  |    |   |  | 
	
		 M66.14 | 
		 | 
		Rupture of synovium, hand and fingers | 
	 
 |  | 
	
		 M66.141 | 
		 | 
		Rupture of synovium, right hand | 
	 
  |   |  | 
	
		 M66.142 | 
		 | 
		Rupture of synovium, left hand | 
	 
  |   |  | 
	
		 M66.143 | 
		 | 
		Rupture of synovium, unspecified hand | 
	 
  |   |  | 
	
		 M66.144 | 
		 | 
		Rupture of synovium, right finger(s) | 
	 
  |   |  | 
	
		 M66.145 | 
		 | 
		Rupture of synovium, left finger(s) | 
	 
  |   |  | 
	
		 M66.146 | 
		 | 
		Rupture of synovium, unspecified finger(s) | 
	 
  |    |   |  | 
	
		 M66.15 | 
		 | 
		Rupture of synovium, hip | 
	 
 |  | 
	
		 M66.151 | 
		 | 
		Rupture of synovium, right hip | 
	 
  |   |  | 
	
		 M66.152 | 
		 | 
		Rupture of synovium, left hip | 
	 
  |   |  | 
	
		 M66.159 | 
		 | 
		Rupture of synovium, unspecified hip | 
	 
  |    |   |  | 
	
		 M66.17 | 
		 | 
		Rupture of synovium, ankle, foot and toes | 
	 
 |  | 
	
		 M66.171 | 
		 | 
		Rupture of synovium, right ankle | 
	 
  |   |  | 
	
		 M66.172 | 
		 | 
		Rupture of synovium, left ankle | 
	 
  |   |  | 
	
		 M66.173 | 
		 | 
		Rupture of synovium, unspecified ankle | 
	 
  |   |  | 
	
		 M66.174 | 
		 | 
		Rupture of synovium, right foot | 
	 
  |   |  | 
	
		 M66.175 | 
		 | 
		Rupture of synovium, left foot | 
	 
  |   |  | 
	
		 M66.176 | 
		 | 
		Rupture of synovium, unspecified foot | 
	 
  |   |  | 
	
		 M66.177 | 
		 | 
		Rupture of synovium, right toe(s) | 
	 
  |   |  | 
	
		 M66.178 | 
		 | 
		Rupture of synovium, left toe(s) | 
	 
  |   |  | 
	
		 M66.179 | 
		 | 
		Rupture of synovium, unspecified toe(s) | 
	 
  |    |   |  | 
	
		 M66.18 | 
		 | 
		Rupture of synovium, other site | 
	 
  |    | 
 |  | 
	
		 M66.2 | 
		 | 
		Spontaneous rupture of extensor tendons | 
	 
 |  | 
	
		 M66.20 | 
		 | 
		Spontaneous rupture of extensor tendons, unspecified site | 
	 
  |   |  | 
	
		 M66.21 | 
		 | 
		Spontaneous rupture of extensor tendons, shoulder | 
	 
 |  | 
	
		 M66.211 | 
		 | 
		Spontaneous rupture of extensor tendons, right shoulder | 
	 
  |   |  | 
	
		 M66.212 | 
		 | 
		Spontaneous rupture of extensor tendons, left shoulder | 
	 
  |   |  | 
	
		 M66.219 | 
		 | 
		Spontaneous rupture of extensor tendons, unspecified shoulder | 
	 
  |    |   |  | 
	
		 M66.22 | 
		 | 
		Spontaneous rupture of extensor tendons, upper arm | 
	 
 |  | 
	
		 M66.221 | 
		 | 
		Spontaneous rupture of extensor tendons, right upper arm | 
	 
  |   |  | 
	
		 M66.222 | 
		 | 
		Spontaneous rupture of extensor tendons, left upper arm | 
	 
  |   |  | 
	
		 M66.229 | 
		 | 
		Spontaneous rupture of extensor tendons, unspecified upper arm | 
	 
  |    |   |  | 
	
		 M66.23 | 
		 | 
		Spontaneous rupture of extensor tendons, forearm | 
	 
 |  | 
	
		 M66.231 | 
		 | 
		Spontaneous rupture of extensor tendons, right forearm | 
	 
  |   |  | 
	
		 M66.232 | 
		 | 
		Spontaneous rupture of extensor tendons, left forearm | 
	 
  |   |  | 
	
		 M66.239 | 
		 | 
		Spontaneous rupture of extensor tendons, unspecified forearm | 
	 
  |    |   |  | 
	
		 M66.24 | 
		 | 
		Spontaneous rupture of extensor tendons, hand | 
	 
 |  | 
	
		 M66.241 | 
		 | 
		Spontaneous rupture of extensor tendons, right hand | 
	 
  |   |  | 
	
		 M66.242 | 
		 | 
		Spontaneous rupture of extensor tendons, left hand | 
	 
  |   |  | 
	
		 M66.249 | 
		 | 
		Spontaneous rupture of extensor tendons, unspecified hand | 
	 
  |    |   |  | 
	
		 M66.25 | 
		 | 
		Spontaneous rupture of extensor tendons, thigh | 
	 
 |  | 
	
		 M66.251 | 
		 | 
		Spontaneous rupture of extensor tendons, right thigh | 
	 
  |   |  | 
	
		 M66.252 | 
		 | 
		Spontaneous rupture of extensor tendons, left thigh | 
	 
  |   |  | 
	
		 M66.259 | 
		 | 
		Spontaneous rupture of extensor tendons, unspecified thigh | 
	 
  |    |   |  | 
	
		 M66.26 | 
		 | 
		Spontaneous rupture of extensor tendons, lower leg | 
	 
 |  | 
	
		 M66.261 | 
		 | 
		Spontaneous rupture of extensor tendons, right lower leg | 
	 
  |   |  | 
	
		 M66.262 | 
		 | 
		Spontaneous rupture of extensor tendons, left lower leg | 
	 
  |   |  | 
	
		 M66.269 | 
		 | 
		Spontaneous rupture of extensor tendons, unspecified lower leg | 
	 
  |    |   |  | 
	
		 M66.27 | 
		 | 
		Spontaneous rupture of extensor tendons, ankle and foot | 
	 
 |  | 
	
		 M66.271 | 
		 | 
		Spontaneous rupture of extensor tendons, right ankle and foot | 
	 
  |   |  | 
	
		 M66.272 | 
		 | 
		Spontaneous rupture of extensor tendons, left ankle and foot | 
	 
  |   |  | 
	
		 M66.279 | 
		 | 
		Spontaneous rupture of extensor tendons, unspecified ankle and foot | 
	 
  |    |   |  | 
	
		 M66.28 | 
		 | 
		Spontaneous rupture of extensor tendons, other site | 
	 
  |   |  | 
	
		 M66.29 | 
		 | 
		Spontaneous rupture of extensor tendons, multiple sites | 
	 
  |    | 
 |  | 
	
		 M66.3 | 
		 | 
		Spontaneous rupture of flexor tendons | 
	 
 |  | 
	
		 M66.30 | 
		 | 
		Spontaneous rupture of flexor tendons, unspecified site | 
	 
  |   |  | 
	
		 M66.31 | 
		 | 
		Spontaneous rupture of flexor tendons, shoulder | 
	 
 |  | 
	
		 M66.311 | 
		 | 
		Spontaneous rupture of flexor tendons, right shoulder | 
	 
  |   |  | 
	
		 M66.312 | 
		 | 
		Spontaneous rupture of flexor tendons, left shoulder | 
	 
  |   |  | 
	
		 M66.319 | 
		 | 
		Spontaneous rupture of flexor tendons, unspecified shoulder | 
	 
  |    |   |  | 
	
		 M66.32 | 
		 | 
		Spontaneous rupture of flexor tendons, upper arm | 
	 
 |  | 
	
		 M66.321 | 
		 | 
		Spontaneous rupture of flexor tendons, right upper arm | 
	 
  |   |  | 
	
		 M66.322 | 
		 | 
		Spontaneous rupture of flexor tendons, left upper arm | 
	 
  |   |  | 
	
		 M66.329 | 
		 | 
		Spontaneous rupture of flexor tendons, unspecified upper arm | 
	 
  |    |   |  | 
	
		 M66.33 | 
		 | 
		Spontaneous rupture of flexor tendons, forearm | 
	 
 |  | 
	
		 M66.331 | 
		 | 
		Spontaneous rupture of flexor tendons, right forearm | 
	 
  |   |  | 
	
		 M66.332 | 
		 | 
		Spontaneous rupture of flexor tendons, left forearm | 
	 
  |   |  | 
	
		 M66.339 | 
		 | 
		Spontaneous rupture of flexor tendons, unspecified forearm | 
	 
  |    |   |  | 
	
		 M66.34 | 
		 | 
		Spontaneous rupture of flexor tendons, hand | 
	 
 |  | 
	
		 M66.341 | 
		 | 
		Spontaneous rupture of flexor tendons, right hand | 
	 
  |   |  | 
	
		 M66.342 | 
		 | 
		Spontaneous rupture of flexor tendons, left hand | 
	 
  |   |  | 
	
		 M66.349 | 
		 | 
		Spontaneous rupture of flexor tendons, unspecified hand | 
	 
  |    |   |  | 
	
		 M66.35 | 
		 | 
		Spontaneous rupture of flexor tendons, thigh | 
	 
 |  | 
	
		 M66.351 | 
		 | 
		Spontaneous rupture of flexor tendons, right thigh | 
	 
  |   |  | 
	
		 M66.352 | 
		 | 
		Spontaneous rupture of flexor tendons, left thigh | 
	 
  |   |  | 
	
		 M66.359 | 
		 | 
		Spontaneous rupture of flexor tendons, unspecified thigh | 
	 
  |    |   |  | 
	
		 M66.36 | 
		 | 
		Spontaneous rupture of flexor tendons, lower leg | 
	 
 |  | 
	
		 M66.361 | 
		 | 
		Spontaneous rupture of flexor tendons, right lower leg | 
	 
  |   |  | 
	
		 M66.362 | 
		 | 
		Spontaneous rupture of flexor tendons, left lower leg | 
	 
  |   |  | 
	
		 M66.369 | 
		 | 
		Spontaneous rupture of flexor tendons, unspecified lower leg | 
	 
  |    |   |  | 
	
		 M66.37 | 
		 | 
		Spontaneous rupture of flexor tendons, ankle and foot | 
	 
 |  | 
	
		 M66.371 | 
		 | 
		Spontaneous rupture of flexor tendons, right ankle and foot | 
	 
  |   |  | 
	
		 M66.372 | 
		 | 
		Spontaneous rupture of flexor tendons, left ankle and foot | 
	 
  |   |  | 
	
		 M66.379 | 
		 | 
		Spontaneous rupture of flexor tendons, unspecified ankle and foot | 
	 
  |    |   |  | 
	
		 M66.38 | 
		 | 
		Spontaneous rupture of flexor tendons, other site | 
	 
  |   |  | 
	
		 M66.39 | 
		 | 
		Spontaneous rupture of flexor tendons, multiple sites | 
	 
  |    | 
 |  | 
	
		 M66.8 | 
		 | 
		Spontaneous rupture of other tendons | 
	 
 |  | 
	
		 M66.80 | 
		 | 
		Spontaneous rupture of other tendons, unspecified site | 
	 
  |   |  | 
	
		 M66.81 | 
		 | 
		Spontaneous rupture of other tendons, shoulder | 
	 
 |  | 
	
		 M66.811 | 
		 | 
		Spontaneous rupture of other tendons, right shoulder | 
	 
  |   |  | 
	
		 M66.812 | 
		 | 
		Spontaneous rupture of other tendons, left shoulder | 
	 
  |   |  | 
	
		 M66.819 | 
		 | 
		Spontaneous rupture of other tendons, unspecified shoulder | 
	 
  |    |   |  | 
	
		 M66.82 | 
		 | 
		Spontaneous rupture of other tendons, upper arm | 
	 
 |  | 
	
		 M66.821 | 
		 | 
		Spontaneous rupture of other tendons, right upper arm | 
	 
  |   |  | 
	
		 M66.822 | 
		 | 
		Spontaneous rupture of other tendons, left upper arm | 
	 
  |   |  | 
	
		 M66.829 | 
		 | 
		Spontaneous rupture of other tendons, unspecified upper arm | 
	 
  |    |   |  | 
	
		 M66.83 | 
		 | 
		Spontaneous rupture of other tendons, forearm | 
	 
 |  | 
	
		 M66.831 | 
		 | 
		Spontaneous rupture of other tendons, right forearm | 
	 
  |   |  | 
	
		 M66.832 | 
		 | 
		Spontaneous rupture of other tendons, left forearm | 
	 
  |   |  | 
	
		 M66.839 | 
		 | 
		Spontaneous rupture of other tendons, unspecified forearm | 
	 
  |    |   |  | 
	
		 M66.84 | 
		 | 
		Spontaneous rupture of other tendons, hand | 
	 
 |  | 
	
		 M66.841 | 
		 | 
		Spontaneous rupture of other tendons, right hand | 
	 
  |   |  | 
	
		 M66.842 | 
		 | 
		Spontaneous rupture of other tendons, left hand | 
	 
  |   |  | 
	
		 M66.849 | 
		 | 
		Spontaneous rupture of other tendons, unspecified hand | 
	 
  |    |   |  | 
	
		 M66.85 | 
		 | 
		Spontaneous rupture of other tendons, thigh | 
	 
 |  | 
	
		 M66.851 | 
		 | 
		Spontaneous rupture of other tendons, right thigh | 
	 
  |   |  | 
	
		 M66.852 | 
		 | 
		Spontaneous rupture of other tendons, left thigh | 
	 
  |   |  | 
	
		 M66.859 | 
		 | 
		Spontaneous rupture of other tendons, unspecified thigh | 
	 
  |    |   |  | 
	
		 M66.86 | 
		 | 
		Spontaneous rupture of other tendons, lower leg | 
	 
 |  | 
	
		 M66.861 | 
		 | 
		Spontaneous rupture of other tendons, right lower leg | 
	 
  |   |  | 
	
		 M66.862 | 
		 | 
		Spontaneous rupture of other tendons, left lower leg | 
	 
  |   |  | 
	
		 M66.869 | 
		 | 
		Spontaneous rupture of other tendons, unspecified lower leg | 
	 
  |    |   |  | 
	
		 M66.87 | 
		 | 
		Spontaneous rupture of other tendons, ankle and foot | 
	 
 |  | 
	
		 M66.871 | 
		 | 
		Spontaneous rupture of other tendons, right ankle and foot | 
	 
  |   |  | 
	
		 M66.872 | 
		 | 
		Spontaneous rupture of other tendons, left ankle and foot | 
	 
  |   |  | 
	
		 M66.879 | 
		 | 
		Spontaneous rupture of other tendons, unspecified ankle and foot | 
	 
  |    |   |  | 
	
		 M66.88 | 
		 | 
		Spontaneous rupture of other tendons, other sites | 
	 
  |   |  | 
	
		 M66.89 | 
		 | 
		Spontaneous rupture of other tendons, multiple sites | 
	 
  |    | 
 |  | 
	
		 M66.9 | 
		  | 
		Spontaneous rupture of unspecified tendon | 
	 
	
		 |  | 
		
| Rupture at musculotendinous junction, nontraumatic |   
 | 
	   |