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ICD-10 Guide
DiagnosesAnterior Cruciate Ligament Sprain

Anterior Cruciate Ligament Sprain

ICD-10 Coding for Anterior Cruciate Ligament Sprain(S83.511A, S83.512A)

PRIMARY SPECIALTYOrthopedics
COMPLEXITYHigh
LAST UPDATED09/15/2025
Sam Tuffun, PT, DPT
Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Anterior Cruciate Ligament Sprain?
Essential facts and insights about Anterior Cruciate Ligament Sprain

Key Clinical Considerations:

  • Patient presents with knee pain, swelling, and instability after a twisting injury.
  • Positive Lachman test or anterior drawer test indicating anterior cruciate ligament (ACL) involvement.
  • Physical examination reveals joint effusion and limited range of motion.
  • MRI findings show partial or complete tear of the anterior cruciate ligament.
  • Severity is classified as mild (grade I), moderate (grade II), or severe (grade III) based on the extent of the ligament damage.

Clinical Information

Clinical Criteria & Documentation Requirements

  • Document the mechanism of injury, including details of the event leading to the sprain.
  • Use specific terminology such as 'ACL sprain' and grade the severity if applicable.
  • Examples include: 'Patient diagnosed with a grade II ACL sprain based on clinical examination and MRI findings.'
  • Medical necessity must be established through documentation of symptoms and functional limitations.
  • Quality measures may include documentation of follow-up care and rehabilitation plans.

Coding Guidelines

Usage Guidelines & Examples

  • Use S83.511A for a right knee ACL sprain and S83.512A for a left knee ACL sprain.
  • Do not use these codes for ACL injuries that are chronic or degenerative in nature.
  • Compare with S83.519A for unspecified ACL sprain and S83.510A for unspecified knee sprain.
  • Common errors include misclassifying the severity of the sprain or failing to specify laterality.
  • In complex cases, ensure to document all relevant findings to support the selected code.

Code Exclusions

Important Exclusions

  • Excludes chronic ACL injuries or degenerative changes in the ligament.
  • Alternative codes for excluded conditions include M17 for osteoarthritis of the knee.
  • Conditions are excluded to ensure accurate representation of acute injuries versus chronic conditions.
  • Common mistakes include coding an ACL sprain when the injury is actually a chronic condition.
  • Related but distinct conditions include collateral ligament injuries and meniscal tears.

Related ICD-10 Codes

Primary Codes
S83.511A
Right knee anterior cruciate ligament sprain, initial encounter
S83.512A
Left knee anterior cruciate ligament sprain, initial encounter
Ancillary Codes
W01.0XXA
W76.12XA
Differential Codes
S83.1
S83.2

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Orthopedics

Specialty Applications

  • Applies to acute knee injuries, particularly in athletes and active individuals.
  • Patient populations include young adults and athletes, especially those involved in sports with high pivoting demands.
  • Clinical settings include outpatient orthopedic clinics, emergency departments, and sports medicine facilities.
  • Specialty-specific applications are relevant in orthopedics and sports medicine.
  • Treatment contexts include post-injury assessment, rehabilitation, and surgical intervention if necessary.

Coding Complexity

High Complexity

This diagnosis requires careful attention to:

  • Comprehensive clinical documentation
  • Accurate code selection based on clinical criteria
  • Proper exclusion considerations
  • Specialty-specific coding guidelines

Documentation

Documentation Templates

Template 1

Template: 'Patient diagnosed with ACL sprain based on clinical findings of knee instability and MRI results.'

Template 2

Template: 'Clinical presentation consistent with ACL sprain including pain and swelling after a sports injury.'

Template 3

Template: 'Diagnostic criteria for ACL sprain met as evidenced by positive Lachman test and MRI findings.'

Template 4

Template: 'Treatment plan initiated for ACL sprain with physical therapy and follow-up in 6 weeks.'

Template 5

Template: 'Follow-up care for ACL sprain including monitoring of range of motion and strength.'

Billing Information

Billing Considerations

  • Ensure proper documentation for billing
  • Verify code specificity requirements
  • Check for any additional codes needed
  • Review payer-specific guidelines

Common Issues

  • Insufficient clinical documentation
  • Incorrect code selection
  • Missing supporting diagnoses
  • Timing and frequency documentation

Frequently Asked Questions

What documentation is required for this diagnosis?

Documentation should include the mechanism of injury, clinical findings, and imaging results.

How does this differ from similar diagnoses?

Differentiation is based on specific ligament involvement and the mechanism of injury.

What are common billing considerations?

Ensure to document medical necessity and any associated treatments to optimize claims.

What procedures are typically associated?

Commonly associated CPT codes include arthroscopy and ACL reconstruction.

Are there any quality reporting implications?

Quality measures may include tracking rehabilitation outcomes and follow-up care.