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ICD-10 Guide
ICD-10 CodesS31.835

S31.835

Billable

Open bite of anus

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/23/2025

Code Description

ICD-10 S31.835 is a billable code used to indicate a diagnosis of open bite of anus.

Key Diagnostic Point:

An open bite of the anus is a traumatic injury characterized by a laceration or puncture wound to the anal region, often resulting from penetrating trauma, such as bites from animals or human bites. This injury can lead to significant complications, including infection, bleeding, and potential damage to surrounding structures, including the rectum and pelvic organs. The management of an open bite of the anus typically involves thorough cleaning of the wound, assessment for any associated injuries, and may require surgical intervention to repair any damage and prevent infection. In cases of severe trauma, associated injuries to the abdominal cavity, pelvic region, or lumbar spine may also be present, necessitating a comprehensive evaluation and multidisciplinary approach to treatment. Emergency surgical interventions may include debridement, repair of the anal sphincter, and, in some cases, colostomy if the injury is extensive. Proper coding for this condition is crucial for accurate medical billing and to ensure appropriate reimbursement for the services rendered.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Variability in presentation and severity of the injury
  • Potential for associated injuries requiring additional codes
  • Need for detailed documentation of the mechanism of injury
  • Variations in treatment protocols based on the extent of the injury

Audit Risk Factors

  • Inadequate documentation of the mechanism of injury
  • Failure to document associated injuries
  • Inconsistent coding of the injury severity
  • Lack of clarity in surgical intervention details

Specialty Focus

Medical Specialties

Emergency Medicine

Documentation Requirements

Detailed account of the injury mechanism, assessment findings, and treatment provided.

Common Clinical Scenarios

Patients presenting with bite wounds, trauma from falls, or accidents involving sharp objects.

Billing Considerations

Ensure thorough documentation of any associated injuries and the rationale for surgical intervention.

Colorectal Surgery

Documentation Requirements

Comprehensive surgical notes detailing the procedure, findings, and postoperative care.

Common Clinical Scenarios

Surgical repair of anal injuries, management of infections, and complications arising from trauma.

Billing Considerations

Accurate coding of any additional procedures performed during surgery is essential.

Coding Guidelines

Inclusion Criteria

Use S31.835 When
  • According to the ICD
  • CM coding guidelines, S31
  • 835 should be used when the injury is specifically described as an open bite of the anus
  • Coders must ensure that the documentation supports the diagnosis and includes details about the mechanism of injury and any associated conditions

Exclusion Criteria

Do NOT use S31.835 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

45100CPT Code

Incision and drainage of perianal abscess

Clinical Scenario

Used when an open bite leads to abscess formation requiring drainage.

Documentation Requirements

Document the reason for drainage and any associated findings.

Specialty Considerations

Ensure that the procedure is linked to the diagnosis of open bite.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of injuries like open bite of the anus, improving the accuracy of medical records and billing. This specificity aids in better tracking of injury types and outcomes, ultimately enhancing patient care.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of injuries like open bite of the anus, improving the accuracy of medical records and billing. This specificity aids in better tracking of injury types and outcomes, ultimately enhancing patient care.

Reimbursement & Billing Impact

billing. This specificity aids in better tracking of injury types and outcomes, ultimately enhancing patient care.

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

What is the primary cause of an open bite of the anus?

Open bites of the anus are primarily caused by animal bites, human bites, or accidents involving sharp objects. The mechanism of injury is crucial for accurate coding and treatment planning.