S99.91 Unspecified injury of ankle

Non-billable header with 3 child codes.

Applies from S99.9 Unspecified injury of ankle and foot

7th character note

• The appropriate 7th character is to be added to each code from subcategory S99.9

7th character required

• A — initial encounter
• D — subsequent encounter
• S — sequela

Codes under S99.91

• S99.911 Unspecified injury of right ankle
• S99.912 Unspecified injury of left ankle
• S99.919 Unspecified injury of unspecified ankle

Code annotations containing back-references to S99.91

Back-references to S99

• Type 2 Excludes: S89 Other and unspecified injuries of lower leg ("other and unspecified injuries of ankle and foot (S99.-)")

Diagnosis Index entries for S99.91

• Injury › ankle

Nearby codes

• S99.829 Other specified injuries of unspecified foot
• S99.829A Other specified injuries of unspecified foot, initial encounter
• S99.829D Other specified injuries of unspecified foot, subsequent encounter
• S99.829S Other specified injuries of unspecified foot, sequela
• S99.9 Unspecified injury of ankle and foot
• S99.91 Unspecified injury of ankle (this code)
• S99.911 Unspecified injury of right ankle
• S99.911A Unspecified injury of right ankle, initial encounter
• S99.911D Unspecified injury of right ankle, subsequent encounter
• S99.911S Unspecified injury of right ankle, sequela
• S99.912 Unspecified injury of left ankle