For codes less than 6 characters that require a 7th character a placeholder 'X' should be assigned for all characters less than 6. The 7th character must always be the 7th position of a code. E.g. The ICD-10-CM code T67.4 (Heat exhaustion due to salt depletion) requires an Episode of Care identifier.
The ICD-10-CM External Cause Index links the below-listed medical terms to the ICD code W21.04. Click on any term below to browse the external cause index.