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v1.0.0
ICD-10 Guide
DiagnosesLeft Knee Instability

Left Knee Instability

ICD-10 Coding for Left Knee Instability(M23.262, M25.362)

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

Diagnosis Overview

What is Left Knee Instability?
Essential facts and insights about Left Knee Instability

Key Clinical Considerations:

  • Instability during weight-bearing activities
  • Pain and swelling around the knee joint
  • Difficulty with knee extension or flexion

Clinical Information

Clinical Criteria & Documentation Requirements

  • Patient history including previous injuries or surgeries
  • Detailed description of physical exam findings
  • Results of imaging studies (e.g., MRI, X-ray)

Coding Guidelines

Usage Guidelines & Examples

  • Follow guidelines for coding instability versus other knee conditions.
  • Common errors include misclassifying the type of instability.

Code Exclusions

Important Exclusions

  • Fractures of the knee, ligament tears not associated with instability
  • Alternative codes for knee pain without instability

Related ICD-10 Codes

Primary Codes
M23.2
Internal derangement of knee
M25.361
Pain in left knee
Ancillary Codes
M23.512
Differential Codes
M25.362
M23.262

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Orthopedics

Specialty Applications

  • Athletes, elderly patients, individuals with prior knee injuries
  • Orthopedic clinics, sports medicine facilities

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

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

Documentation requirements?

Include detailed history, physical exam findings, and imaging results.

Billing considerations?

Ensure accurate coding to reflect the severity and complexity of the condition.