Foreign body of alimentary tract, part unspecified

• birth trauma (P10-P15)
• obstetric trauma (O70-O71)

code to identify any retained foreign body, if applicable (Z18.-)

• Use secondary code(s) from Chapter 20, External causes of morbidity, to indicate cause of injury. Codes within the T section that include the external cause do not require an additional external cause code
• The chapter uses the S-section for coding different types of injuries related to single body regions and the T-section to cover injuries to unspecified body regions as well as poisoning and certain other consequences of external causes.

• foreign body accidentally left in operation wound (T81.5-)
• foreign body in penetrating wound - See open wound by body region
• residual foreign body in soft tissue (M79.5)
• splinter, without open wound - See superficial injury by body region

code, if known, for foreign body entering into or through a natural orifice (W44.-)

foreign body in pharynx (T17.2-)

The appropriate 7th character is to be added to each code from category T18