Postinfective and reactive arthropathies

• arthropathic psoriasis (L40.5-)
• certain conditions originating in the perinatal period (P04-P96)
• certain infectious and parasitic diseases (A00-B99)
• compartment syndrome (traumatic) (T79.A-)
• complications of pregnancy, childbirth and the puerperium (O00-O9A)
• congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
• endocrine, nutritional and metabolic diseases (E00-E88)
• injury, poisoning and certain other consequences of external causes (S00-T88)
• neoplasms (C00-D49)
• symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition

Disorders affecting predominantly peripheral (limb) joints

• This block comprises arthropathies due to microbiological agents. Distinction is made between the following types of etiological relationship:
• a) direct infection of joint, where organisms invade synovial tissue and microbial antigen is present in the joint;
• b) indirect infection, which may be of two types: a reactive arthropathy, where microbial infection of the body is established but neither organisms nor antigens can be identified in the joint, and a postinfective arthropathy, where microbial antigen is present but recovery of an organism is inconstant and evidence of local multiplication is lacking.