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ICD-10 Guide
DiagnosesAcl Tear Left Knee

Acl Tear Left Knee

ICD-10 Coding for ACL Tear Left Knee(S83.512A)

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

Diagnosis Overview

What is Acl Tear Left Knee?
Essential facts and insights about ACL Tear Left Knee

Key Clinical Considerations:

  • Presence of acute knee pain and swelling
  • Positive results from Lachman's test, Pivot-shift test, or Anterior drawer test
  • MRI confirmation of ACL tear

Clinical Information

Clinical Criteria & Documentation Requirements

  • Detailed description of the injury event
  • Specific location of the injury - left knee
  • Clinical findings from physical examination and imaging studies

Coding Guidelines

Usage Guidelines & Examples

  • S83.512A is specific to initial encounter for ACL tear in left knee. Other codes in the S83 series may apply to other knee injuries or right knee.
  • S83.512D and S83.512S are used for subsequent encounters and sequela respectively.

Code Exclusions

Important Exclusions

  • Chronic or degenerative conditions of the ACL
  • Injuries to other knee ligaments or to the right knee

Related ICD-10 Codes

Primary Codes
S83.512A
Sprain of anterior cruciate ligament of left knee, initial encounter
Ancillary Codes
M25.562
Differential Codes
M23.511

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Orthopedics

Specialty Applications

  • Acute injuries where the left knee's anterior cruciate ligament is torn
  • Sports injuries resulting in a left knee ACL tear

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

Patient presents with acute left knee pain and swelling following a sports injury.

Template 2

MRI confirms diagnosis of anterior cruciate ligament tear in the left knee.

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

Can this code be used for follow-up visits?

No, S83.512A is for initial encounters. Use S83.512D for subsequent encounters and S83.512S for sequela.

When should this code be used?

This code should be used when the patient first presents with an ACL tear of the left knee.