Minor contusion of unspecified kidney

• 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.

• injuries to the abdominal wall
• injuries to the anus
• injuries to the buttock
• injuries to the external genitalia
• injuries to the flank
• injuries to the groin

• burns and corrosions (T20-T32)
• effects of foreign body in anus and rectum (T18.5)
• effects of foreign body in genitourinary tract (T19.-)
• effects of foreign body in stomach, small intestine and colon (T18.2-T18.4)
• frostbite (T33-T34)
• insect bite or sting, venomous (T63.4)

obstetric trauma to pelvic organs (O71.-)

• injury of peritoneum (S36.81)
• injury of retroperitoneum (S36.89-)

any associated open wound (S31.-)

The appropriate 7th character is to be added to each code from category S37

acute kidney injury (nontraumatic) (N17.9)

• Contusion of kidney less than 2 cm
• Contusion of kidney NOS