Unspecified fracture of first metacarpal bone

• 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.

• burns and corrosions (T20-T32)
• frostbite (T33-T34)
• insect bite or sting, venomous (T63.4)

traumatic amputation of wrist and hand (S68.-)

fracture of distal parts of ulna and radius (S52.-)

• A fracture not indicated as displaced or nondisplaced should be coded to displaced
• A fracture not indicated as open or closed should be coded to closed

The appropriate 7th character is to be added to each code from category S62