M25.4 - Effusion of joint
M25.47 - Effusion, ankle and foot
M25.471 - Effusion, right ankle
M25.472 - Effusion, left ankle
M25.473 - Effusion, unspecified ankle
M25.474 - Effusion, right foot
M25.475 - Effusion, left foot
M25.476 - Effusion, unspecified foot