Tendinitis and Bursitis ICD-10-CM codes

Tendon and bursa conditions are spread over several categories by site rather than gathered in one place. M70 covers overuse and pressure disorders with laterality at the 6th character: M70.2- olecranon bursitis, M70.4- prepatellar bursitis, M70.5- other knee bursitis, M70.6- trochanteric bursitis (M70.61 right hip, M70.62 left hip), and M70.7- other hip bursitis. M76 is enthesopathy of the lower limb excluding the foot: M76.0- gluteal tendinitis, M76.3- iliotibial band syndrome, M76.5- patellar tendinitis, M76.6- Achilles tendinitis. M77 holds the elbow and foot codes: M77.0- medial epicondylitis (golfer's elbow), M77.1- lateral epicondylitis (tennis elbow), M77.3- calcaneal spur, M77.4- metatarsalgia, M77.5- other foot and ankle enthesopathy.

Shoulder tendinitis and bursitis are in M75 (M75.2- bicipital tendinitis, M75.3- calcific tendinitis, M75.5- bursitis of shoulder), not in M70 or M77. Tenosynovitis is category M65: de Quervain tenosynovitis is M65.4 with no laterality, trigger finger is M65.3- with a 5th character for the digit and a 6th for side, and other synovitis or tenosynovitis by region is M65.8-. A Baker cyst is M71.2- and unspecified bursopathy is M71.9.

Nearly every code in this group has laterality, so an unspecified-side code (6th character 0 or 9) is a documentation gap rather than a valid default. Category M70 also carries a note to add a Y93 activity code when the overuse activity is documented. Traumatic tendon ruptures are chapter 19 injury codes, and calcific tendinitis of sites other than the shoulder is M65.2-.