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Injury, poisoning and certain other consequences of external causes (S00-T88)

Note:: 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.

Use additional: code to identify any retained foreign body, if applicable (Z18.-)
Excludes 1:: birth trauma (P10-P15)
obstetric trauma (O70-O71)

Injuries to the ankle and foot (S90-S99)

Excludes 2:: burns and corrosions (T20-T32)
fracture of ankle and malleolus (S82.-)
frostbite (T33-T34)
insect bite or sting, venomous (T63.4)

S90

Superficial injury of ankle, foot and toes [+]

The appropriate 7th character is to be added to each code from category S90
A - initial encounter
D - subsequent encounter
S - sequela

S91

Open wound of ankle, foot and toes [+]

Code also	any associated wound infection
Excludes 1:	open fracture of ankle, foot and toes (S92.-with 7th character B) traumatic amputation of ankle and foot (S98.-)
The appropriate 7th character is to be added to each code from category S91 A - initial encounter D - subsequent encounter S - sequela

S92

Fracture of foot and toe, except ankle [+]

Note:

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

Excludes 2:	fracture of ankle (S82.-) fracture of malleolus (S82.-) traumatic amputation of ankle and foot (S98.-)
The appropriate 7th character is to be added to each code from category S92 A - initial encounter for closed fracture B - initial encounter for open fracture D - subsequent encounter for fracture with routine healing G - subsequent encounter for fracture with delayed healing K - subsequent encounter for fracture with nonunion P - subsequent encounter for fracture with malunion S - sequela

S93

Dislocation and sprain of joints and ligaments at ankle, foot and toe level [+]

Includes:	avulsion of joint or ligament of ankle, foot and toe laceration of cartilage, joint or ligament of ankle, foot and toe sprain of cartilage, joint or ligament of ankle, foot and toe traumatic hemarthrosis of joint or ligament of ankle, foot and toe traumatic rupture of joint or ligament of ankle, foot and toe traumatic subluxation of joint or ligament of ankle, foot and toe traumatic tear of joint or ligament of ankle, foot and toe
Code also	any associated open wound
Excludes 2:	strain of muscle and tendon of ankle and foot (S96.-)
The appropriate 7th character is to be added to each code from category S93 A - initial encounter D - subsequent encounter S - sequela

S94

Injury of nerves at ankle and foot level [+]

Code also	any associated open wound (S91.-)
The appropriate 7th character is to be added to each code from category S94 A - initial encounter D - subsequent encounter S - sequela

S95

Injury of blood vessels at ankle and foot level [+]

Code also	any associated open wound (S91.-)
Excludes 2:	injury of posterior tibial artery and vein (S85.1-, S85.8-)
The appropriate 7th character is to be added to each code from category S95 A - initial encounter D - subsequent encounter S - sequela

S96

Injury of muscle and tendon at ankle and foot level [+]

Code also	any associated open wound (S91.-)
Excludes 2:	injury of Achilles tendon (S86.0-) sprain of joints and ligaments of ankle and foot (S93.-)
The appropriate 7th character is to be added to each code from category S96 A - initial encounter D - subsequent encounter S - sequela

S97

Crushing injury of ankle and foot [+]

Use additional	code(s) for all associated injuries
The appropriate 7th character is to be added to each code from category S97 A - initial encounter D - subsequent encounter S - sequela

S98

Traumatic amputation of ankle and foot [+]
An amputation not identified as partial or complete should be coded to complete

The appropriate 7th character is to be added to each code from category S98
A - initial encounter
D - subsequent encounter
S - sequela

S99

Other and unspecified injuries of ankle and foot [+]