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  5. S91
  6. 2024 ICD-10-CM Code S91.0
Version 2024
Non-Billable Code

2024 ICD-10-CM Diagnosis Code S91.0

Open wound of ankle

ICD-10-CM Code:
S91.0
ICD-10 Code for:
Open wound of ankle
Is Billable?
Not Valid for Submission
Code Navigator:

Code Classification

  • Injury, poisoning and certain other consequences of external causes
    (S00–T88)
    • Injuries to the ankle and foot
      (S90-S99)
      • Open wound of ankle, foot and toes
        (S91)

S91.0 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of open wound of ankle. The code is not specific and is NOT valid for the year 2024 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding Applicable to Open wound of ankle

Non-specific codes like S91.0 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for open wound of ankle:

  • S91.00 for Unspecified open wound of ankle - NON-BILLABLE CODE

  • S91.001 for Unspecified open wound, right ankle - NON-BILLABLE CODE

  • Use S91.001A for initial encounter - BILLABLE CODE

  • Use S91.001D for subsequent encounter - BILLABLE CODE

  • Use S91.001S for sequela - BILLABLE CODE

  • S91.002 for Unspecified open wound, left ankle - NON-BILLABLE CODE

  • Use S91.002A for initial encounter - BILLABLE CODE

  • Use S91.002D for subsequent encounter - BILLABLE CODE

  • Use S91.002S for sequela - BILLABLE CODE

  • S91.009 for Unspecified open wound, unspecified ankle - NON-BILLABLE CODE

  • Use S91.009A for initial encounter - BILLABLE CODE

  • Use S91.009D for subsequent encounter - BILLABLE CODE

  • Use S91.009S for sequela - BILLABLE CODE

  • S91.01 for Laceration without foreign body of ankle - NON-BILLABLE CODE

  • S91.011 for Laceration without foreign body, right ankle - NON-BILLABLE CODE

  • Use S91.011A for initial encounter - BILLABLE CODE

  • Use S91.011D for subsequent encounter - BILLABLE CODE

  • Use S91.011S for sequela - BILLABLE CODE

  • S91.012 for Laceration without foreign body, left ankle - NON-BILLABLE CODE

  • Use S91.012A for initial encounter - BILLABLE CODE

  • Use S91.012D for subsequent encounter - BILLABLE CODE

  • Use S91.012S for sequela - BILLABLE CODE

  • S91.019 for Laceration without foreign body, unspecified ankle - NON-BILLABLE CODE

  • Use S91.019A for initial encounter - BILLABLE CODE

  • Use S91.019D for subsequent encounter - BILLABLE CODE

  • Use S91.019S for sequela - BILLABLE CODE

  • S91.02 for Laceration with foreign body of ankle - NON-BILLABLE CODE

  • S91.021 for Laceration with foreign body, right ankle - NON-BILLABLE CODE

  • Use S91.021A for initial encounter - BILLABLE CODE

  • Use S91.021D for subsequent encounter - BILLABLE CODE

  • Use S91.021S for sequela - BILLABLE CODE

  • S91.022 for Laceration with foreign body, left ankle - NON-BILLABLE CODE

  • Use S91.022A for initial encounter - BILLABLE CODE

  • Use S91.022D for subsequent encounter - BILLABLE CODE

  • Use S91.022S for sequela - BILLABLE CODE

  • S91.029 for Laceration with foreign body, unspecified ankle - NON-BILLABLE CODE

  • Use S91.029A for initial encounter - BILLABLE CODE

  • Use S91.029D for subsequent encounter - BILLABLE CODE

  • Use S91.029S for sequela - BILLABLE CODE

  • S91.03 for Puncture wound without foreign body of ankle - NON-BILLABLE CODE

  • S91.031 for Puncture wound without foreign body, right ankle - NON-BILLABLE CODE

  • Use S91.031A for initial encounter - BILLABLE CODE

  • Use S91.031D for subsequent encounter - BILLABLE CODE

  • Use S91.031S for sequela - BILLABLE CODE

  • S91.032 for Puncture wound without foreign body, left ankle - NON-BILLABLE CODE

  • Use S91.032A for initial encounter - BILLABLE CODE

  • Use S91.032D for subsequent encounter - BILLABLE CODE

  • Use S91.032S for sequela - BILLABLE CODE

  • S91.039 for Puncture wound without foreign body, unspecified ankle - NON-BILLABLE CODE

  • Use S91.039A for initial encounter - BILLABLE CODE

  • Use S91.039D for subsequent encounter - BILLABLE CODE

  • Use S91.039S for sequela - BILLABLE CODE

  • S91.04 for Puncture wound with foreign body of ankle - NON-BILLABLE CODE

  • S91.041 for Puncture wound with foreign body, right ankle - NON-BILLABLE CODE

  • Use S91.041A for initial encounter - BILLABLE CODE

  • Use S91.041D for subsequent encounter - BILLABLE CODE

  • Use S91.041S for sequela - BILLABLE CODE

  • S91.042 for Puncture wound with foreign body, left ankle - NON-BILLABLE CODE

  • Use S91.042A for initial encounter - BILLABLE CODE

  • Use S91.042D for subsequent encounter - BILLABLE CODE

  • Use S91.042S for sequela - BILLABLE CODE

  • S91.049 for Puncture wound with foreign body, unspecified ankle - NON-BILLABLE CODE

  • Use S91.049A for initial encounter - BILLABLE CODE

  • Use S91.049D for subsequent encounter - BILLABLE CODE

  • Use S91.049S for sequela - BILLABLE CODE

  • S91.05 for Open bite of ankle - NON-BILLABLE CODE

  • S91.051 for Open bite, right ankle - NON-BILLABLE CODE

  • Use S91.051A for initial encounter - BILLABLE CODE

  • Use S91.051D for subsequent encounter - BILLABLE CODE

  • Use S91.051S for sequela - BILLABLE CODE

  • S91.052 for Open bite, left ankle - NON-BILLABLE CODE

  • Use S91.052A for initial encounter - BILLABLE CODE

  • Use S91.052D for subsequent encounter - BILLABLE CODE

  • Use S91.052S for sequela - BILLABLE CODE

  • S91.059 for Open bite, unspecified ankle - NON-BILLABLE CODE

  • Use S91.059A for initial encounter - BILLABLE CODE

  • Use S91.059D for subsequent encounter - BILLABLE CODE

  • Use S91.059S for sequela - BILLABLE CODE

Coding Guidelines

The appropriate 7th character is to be added to each code from block Open wound of ankle, foot and toes (S91). Use the following options for the aplicable episode of care:

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

Patient Education


Ankle Injuries and Disorders

Your ankle bone and the ends of your two lower leg bones make up the ankle joint. Your ligaments, which connect bones to one another, stabilize and support it. Your muscles and tendons move it.

The most common ankle problems are sprains and fractures (broken bones). A sprain is an injury to the ligaments. It may take a few weeks to many months to heal completely. A fracture is a break in a bone. You can also injure other parts of the ankle such as tendons, which join muscles to bone, and cartilage, which cushions your joints. Ankle sprains and fractures are common sports injuries.


[Learn More in MedlinePlus]

Wounds and Injuries

An injury is damage to your body. It is a general term that refers to harm caused by accidents, falls, hits, weapons, and more. In the U.S., millions of people injure themselves every year. These injuries range from minor to life-threatening. Injuries can happen at work or play, indoors or outdoors, driving a car, or walking across the street.

Wounds are injuries that break the skin or other body tissues. They include cuts, scrapes, scratches, and punctured skin. They often happen because of an accident, but surgery, sutures, and stitches also cause wounds. Minor wounds usually aren't serious, but it is important to clean them. Serious and infected wounds may require first aid followed by a visit to your doctor. You should also seek attention if the wound is deep, you cannot close it yourself, you cannot stop the bleeding or get the dirt out, or it does not heal.

Other common types of injuries include:

  • Animal bites
  • Bruises
  • Burns
  • Dislocations
  • Electrical injuries
  • Fractures (broken bones)
  • Sprains and strains

[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.