Hallux rigidus

• 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

joints of the spine (M40-M54)

• acquired absence of fingers and toes (Z89.-)
• congenital absence of fingers and toes (Q71.3-, Q72.3-)
• congenital deformities and malformations of fingers and toes (Q66.-, Q68-Q70, Q74.-)