M65 Synovitis and tenosynovitis
ICD-10-CM category M65 sits in Chapter 13 (Diseases of the musculoskeletal system and connective tissue, M00-M99). It contains 133 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.
Subcategories
M65.0 Abscess of tendon sheathM65.01 Abscess of tendon sheath, shoulderM65.02 Abscess of tendon sheath, upper armM65.03 Abscess of tendon sheath, forearmM65.04 Abscess of tendon sheath, handM65.05 Abscess of tendon sheath, thighM65.06 Abscess of tendon sheath, lower legM65.07 Abscess of tendon sheath, ankle and footM65.1 Other infective (teno)synovitisM65.11 Other infective (teno)synovitis, shoulderM65.12 Other infective (teno)synovitis, elbowM65.13 Other infective (teno)synovitis, wristM65.14 Other infective (teno)synovitis, handM65.15 Other infective (teno)synovitis, hipM65.16 Other infective (teno)synovitis, kneeM65.17 Other infective (teno)synovitis, ankle and footM65.2 Calcific tendinitisM65.22 Calcific tendinitis, upper armM65.23 Calcific tendinitis, forearmM65.24 Calcific tendinitis, handM65.25 Calcific tendinitis, thighM65.26 Calcific tendinitis, lower legM65.27 Calcific tendinitis, ankle and footM65.3 Trigger fingerM65.31 Trigger thumbM65.32 Trigger finger, index fingerM65.33 Trigger finger, middle fingerM65.34 Trigger finger, ring fingerM65.35 Trigger finger, little fingerM65.8 Other synovitis and tenosynovitisM65.81 Other synovitis and tenosynovitis, shoulderM65.82 Other synovitis and tenosynovitis, upper armM65.83 Other synovitis and tenosynovitis, forearmM65.84 Other synovitis and tenosynovitis, handM65.85 Other synovitis and tenosynovitis, thighM65.86 Other synovitis and tenosynovitis, lower legM65.87 Other synovitis and tenosynovitis, ankle and footM65.9 Synovitis and tenosynovitis, unspecifiedM65.91 Unspecified synovitis and tenosynovitis, shoulderM65.92 Unspecified synovitis and tenosynovitis, upper arm
Billable codes in M65
| Code | Description |
|---|---|
M65.00 | Abscess of tendon sheath, unspecified site |
M65.011 | Abscess of tendon sheath, right shoulder |
M65.012 | Abscess of tendon sheath, left shoulder |
M65.019 | Abscess of tendon sheath, unspecified shoulder |
M65.021 | Abscess of tendon sheath, right upper arm |
M65.022 | Abscess of tendon sheath, left upper arm |
M65.029 | Abscess of tendon sheath, unspecified upper arm |
M65.031 | Abscess of tendon sheath, right forearm |
M65.032 | Abscess of tendon sheath, left forearm |
M65.039 | Abscess of tendon sheath, unspecified forearm |
M65.041 | Abscess of tendon sheath, right hand |
M65.042 | Abscess of tendon sheath, left hand |
M65.049 | Abscess of tendon sheath, unspecified hand |
M65.051 | Abscess of tendon sheath, right thigh |
M65.052 | Abscess of tendon sheath, left thigh |
M65.059 | Abscess of tendon sheath, unspecified thigh |
M65.061 | Abscess of tendon sheath, right lower leg |
M65.062 | Abscess of tendon sheath, left lower leg |
M65.069 | Abscess of tendon sheath, unspecified lower leg |
M65.071 | Abscess of tendon sheath, right ankle and foot |
M65.072 | Abscess of tendon sheath, left ankle and foot |
M65.079 | Abscess of tendon sheath, unspecified ankle and foot |
M65.08 | Abscess of tendon sheath, other site |
M65.10 | Other infective (teno)synovitis, unspecified site |
M65.111 | Other infective (teno)synovitis, right shoulder |
M65.112 | Other infective (teno)synovitis, left shoulder |
M65.119 | Other infective (teno)synovitis, unspecified shoulder |
M65.121 | Other infective (teno)synovitis, right elbow |
M65.122 | Other infective (teno)synovitis, left elbow |
M65.129 | Other infective (teno)synovitis, unspecified elbow |
M65.131 | Other infective (teno)synovitis, right wrist |
M65.132 | Other infective (teno)synovitis, left wrist |
M65.139 | Other infective (teno)synovitis, unspecified wrist |
M65.141 | Other infective (teno)synovitis, right hand |
M65.142 | Other infective (teno)synovitis, left hand |
M65.149 | Other infective (teno)synovitis, unspecified hand |
M65.151 | Other infective (teno)synovitis, right hip |
M65.152 | Other infective (teno)synovitis, left hip |
M65.159 | Other infective (teno)synovitis, unspecified hip |
M65.161 | Other infective (teno)synovitis, right knee |
M65.162 | Other infective (teno)synovitis, left knee |
M65.169 | Other infective (teno)synovitis, unspecified knee |
M65.171 | Other infective (teno)synovitis, right ankle and foot |
M65.172 | Other infective (teno)synovitis, left ankle and foot |
M65.179 | Other infective (teno)synovitis, unspecified ankle and foot |
M65.18 | Other infective (teno)synovitis, other site |
M65.19 | Other infective (teno)synovitis, multiple sites |
M65.20 | Calcific tendinitis, unspecified site |
M65.221 | Calcific tendinitis, right upper arm |
M65.222 | Calcific tendinitis, left upper arm |
M65.229 | Calcific tendinitis, unspecified upper arm |
M65.231 | Calcific tendinitis, right forearm |
M65.232 | Calcific tendinitis, left forearm |
M65.239 | Calcific tendinitis, unspecified forearm |
M65.241 | Calcific tendinitis, right hand |
M65.242 | Calcific tendinitis, left hand |
M65.249 | Calcific tendinitis, unspecified hand |
M65.251 | Calcific tendinitis, right thigh |
M65.252 | Calcific tendinitis, left thigh |
M65.259 | Calcific tendinitis, unspecified thigh |
M65.261 | Calcific tendinitis, right lower leg |
M65.262 | Calcific tendinitis, left lower leg |
M65.269 | Calcific tendinitis, unspecified lower leg |
M65.271 | Calcific tendinitis, right ankle and foot |
M65.272 | Calcific tendinitis, left ankle and foot |
M65.279 | Calcific tendinitis, unspecified ankle and foot |
M65.28 | Calcific tendinitis, other site |
M65.29 | Calcific tendinitis, multiple sites |
M65.30 | Trigger finger, unspecified finger |
M65.311 | Trigger thumb, right thumb |
M65.312 | Trigger thumb, left thumb |
M65.319 | Trigger thumb, unspecified thumb |
M65.321 | Trigger finger, right index finger |
M65.322 | Trigger finger, left index finger |
M65.329 | Trigger finger, unspecified index finger |
M65.331 | Trigger finger, right middle finger |
M65.332 | Trigger finger, left middle finger |
M65.339 | Trigger finger, unspecified middle finger |
M65.341 | Trigger finger, right ring finger |
M65.342 | Trigger finger, left ring finger |
M65.349 | Trigger finger, unspecified ring finger |
M65.351 | Trigger finger, right little finger |
M65.352 | Trigger finger, left little finger |
M65.359 | Trigger finger, unspecified little finger |
M65.4 | Radial styloid tenosynovitis [de Quervain] |
M65.80 | Other synovitis and tenosynovitis, unspecified site |
M65.811 | Other synovitis and tenosynovitis, right shoulder |
M65.812 | Other synovitis and tenosynovitis, left shoulder |
M65.819 | Other synovitis and tenosynovitis, unspecified shoulder |
M65.821 | Other synovitis and tenosynovitis, right upper arm |
M65.822 | Other synovitis and tenosynovitis, left upper arm |
M65.829 | Other synovitis and tenosynovitis, unspecified upper arm |
M65.831 | Other synovitis and tenosynovitis, right forearm |
M65.832 | Other synovitis and tenosynovitis, left forearm |
M65.839 | Other synovitis and tenosynovitis, unspecified forearm |
M65.841 | Other synovitis and tenosynovitis, right hand |
M65.842 | Other synovitis and tenosynovitis, left hand |
M65.849 | Other synovitis and tenosynovitis, unspecified hand |
M65.851 | Other synovitis and tenosynovitis, right thigh |
M65.852 | Other synovitis and tenosynovitis, left thigh |
M65.859 | Other synovitis and tenosynovitis, unspecified thigh |
M65.861 | Other synovitis and tenosynovitis, right lower leg |
M65.862 | Other synovitis and tenosynovitis, left lower leg |
M65.869 | Other synovitis and tenosynovitis, unspecified lower leg |
M65.871 | Other synovitis and tenosynovitis, right ankle and foot |
M65.872 | Other synovitis and tenosynovitis, left ankle and foot |
M65.879 | Other synovitis and tenosynovitis, unspecified ankle and foot |
M65.88 | Other synovitis and tenosynovitis, other site |
M65.89 | Other synovitis and tenosynovitis, multiple sites |
M65.90 | Unspecified synovitis and tenosynovitis, unspecified site |
M65.911 | Unspecified synovitis and tenosynovitis, right shoulder |
M65.912 | Unspecified synovitis and tenosynovitis, left shoulder |
M65.919 | Unspecified synovitis and tenosynovitis, unspecified shoulder |
M65.921 | Unspecified synovitis and tenosynovitis, right upper arm |
M65.922 | Unspecified synovitis and tenosynovitis, left upper arm |
M65.929 | Unspecified synovitis and tenosynovitis, unspecified upper arm |
M65.931 | Unspecified synovitis and tenosynovitis, right forearm |
M65.932 | Unspecified synovitis and tenosynovitis, left forearm |
M65.939 | Unspecified synovitis and tenosynovitis, unspecified forearm |
M65.941 | Unspecified synovitis and tenosynovitis, right hand |
M65.942 | Unspecified synovitis and tenosynovitis, left hand |
M65.949 | Unspecified synovitis and tenosynovitis, unspecified hand |
M65.951 | Unspecified synovitis and tenosynovitis, right thigh |
M65.952 | Unspecified synovitis and tenosynovitis, left thigh |
M65.959 | Unspecified synovitis and tenosynovitis, unspecified thigh |
M65.961 | Unspecified synovitis and tenosynovitis, right lower leg |
M65.962 | Unspecified synovitis and tenosynovitis, left lower leg |
M65.969 | Unspecified synovitis and tenosynovitis, unspecified lower leg |
M65.971 | Unspecified synovitis and tenosynovitis, right ankle and foot |
M65.972 | Unspecified synovitis and tenosynovitis, left ankle and foot |
M65.979 | Unspecified synovitis and tenosynovitis, unspecified ankle and foot |
M65.98 | Unspecified synovitis and tenosynovitis, other site |
M65.99 | Unspecified synovitis and tenosynovitis, multiple sites |
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