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v1.0.0
ICD-10 Guide
ICD-10 CodesS81.809

S81.809

Billable

Unspecified open wound, unspecified lower leg

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/26/2025

Code Description

ICD-10 S81.809 is a billable code used to indicate a diagnosis of unspecified open wound, unspecified lower leg.

Key Diagnostic Point:

The ICD-10 code S81.809 refers to an unspecified open wound located on the lower leg. Open wounds can result from various mechanisms, including trauma, falls, or accidents, and may involve damage to the skin, underlying tissues, and possibly bone. In the context of knee injuries, this code may be relevant when a patient presents with an open wound that does not have a specific diagnosis, such as a laceration or abrasion that may accompany tibial or fibular fractures, ligament tears, or other orthopedic injuries. The lower leg encompasses the area between the knee and the ankle, and injuries in this region can lead to complications such as infection, delayed healing, or chronic pain. Accurate coding is essential for proper treatment planning and reimbursement, especially when reconstructive procedures or surgical interventions are necessary to address the injury. Documentation should clearly describe the nature of the wound, any associated injuries, and the treatment provided to ensure appropriate coding and billing.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in documentation quality regarding the specifics of the wound.
  • Potential for multiple associated injuries complicating the coding process.
  • Need for precise anatomical localization to differentiate from other codes.
  • Variations in treatment approaches that may affect coding choices.

Audit Risk Factors

  • Inadequate documentation of the wound's characteristics.
  • Failure to document associated injuries or complications.
  • Use of unspecified codes when more specific codes are available.
  • Inconsistent coding practices across different providers.

Specialty Focus

Medical Specialties

Orthopedic Surgery

Documentation Requirements

Detailed descriptions of the wound, associated fractures, and any surgical interventions performed.

Common Clinical Scenarios

Patients presenting with open fractures, ligament tears, or post-surgical complications.

Billing Considerations

Ensure that all relevant details about the injury mechanism and treatment are documented to support the coding.

Emergency Medicine

Documentation Requirements

Thorough assessment of the wound, including size, depth, and any foreign bodies present.

Common Clinical Scenarios

Patients with traumatic injuries requiring immediate care and potential surgical intervention.

Billing Considerations

Accurate documentation of the initial assessment and treatment provided in the emergency setting is crucial.

Coding Guidelines

Inclusion Criteria

Use S81.809 When
  • According to ICD
  • 10 coding guidelines, coders should use the most specific code available
  • 809 is used when the specifics of the open wound are not documented
  • Coders should ensure that the documentation supports the use of this code and that any associated injuries are also coded appropriately

Exclusion Criteria

Do NOT use S81.809 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

11042CPT Code

Debridement, skin, and subcutaneous tissue

Clinical Scenario

Used for surgical treatment of an open wound requiring debridement.

Documentation Requirements

Document the extent of debridement and the condition of the wound.

Specialty Considerations

Orthopedic surgeons should document the rationale for debridement and any associated procedures.

27814CPT Code

Open treatment of tibial fracture

Clinical Scenario

Used when an open fracture of the tibia is treated surgically.

Documentation Requirements

Detailed operative notes and imaging studies should be included.

Specialty Considerations

Ensure that the fracture type and location are clearly documented.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of open wounds, improving the accuracy of medical records and reimbursement processes. S81.809 serves as a catch-all for unspecified cases, but coders are encouraged to seek more specific codes when available.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of open wounds, improving the accuracy of medical records and reimbursement processes. S81.809 serves as a catch-all for unspecified cases, but coders are encouraged to seek more specific codes when available.

Reimbursement & Billing Impact

reimbursement processes. S81.809 serves as a catch-all for unspecified cases, but coders are encouraged to seek more specific codes when available.

Resources

Clinical References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Coding & Billing References

  • •
    ICD-10-CM Official Guidelines for Coding and Reporting

Frequently Asked Questions

When should I use S81.809 instead of a more specific code?

Use S81.809 when the documentation does not provide enough detail to assign a more specific code. However, always strive for specificity to ensure accurate coding.