Other and unspecified heterotropia

• certain conditions originating in the perinatal period (P04-P96)
• certain infectious and parasitic diseases (A00-B99)
• complications of pregnancy, childbirth and the puerperium (O00-O9A)
• congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
• diabetes mellitus related eye conditions (E09.3-, E10.3-, E11.3-, E13.3-)
• endocrine, nutritional and metabolic diseases (E00-E88)
• injury (trauma) of eye and orbit (S05.-)
• 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)
• syphilis related eye disorders (A50.01, A50.3-, A51.43, A52.71)

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

nystagmus and other irregular eye movements (H55)