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ICD-10 Coding for Right Knee Instability(M25.361, M23.51, S83.51xA)

Complete ICD-10-CM coding and documentation guide for Right Knee Instability. Includes clinical validation requirements, documentation requirements, and coding pitfalls.

Also known as:

Instability of Right KneeRight Knee Ligament Laxity

Related ICD-10 Code Ranges

Complete code families applicable to Right Knee Instability

M23-M25Primary Range

Other joint disorders, not elsewhere classified

Includes codes for joint instability, specifically for the knee.

Dislocation and sprain of joints and ligaments of knee

Includes codes for acute injuries leading to knee instability.

Code Comparison: When to Use Each Code

Compare key differences between these codes to ensure accurate selection

CodeDescriptionWhen to UseKey Documentation
M25.361Other instability, right kneeUse for acute or subacute instability from recent injury or non-chronic causes.
  • Objective instability on exam (e.g., positive anterior drawer test)
  • Documentation of recent injury
M23.51Chronic instability, right kneeUse for chronic instability from old ligament tears or recurrent dislocations.
  • History of prior injury or surgery
  • Persistent instability on exam
S83.51xASprain of anterior cruciate ligament of right knee, initial encounterUse for acute ACL tears causing knee instability.
  • MRI-confirmed ACL tear
  • Instability findings on physical exam

Clinical Decision Support

Always review the patient's clinical documentation thoroughly. When in doubt, choose the more specific code and ensure documentation supports it.

Key Information: ICD-10 code for right knee instability

Essential facts and insights about Right Knee Instability

The ICD-10 code for right knee instability is M25.361 for acute cases and M23.51 for chronic cases.

Primary ICD-10-CM Codes for right knee instability

Other instability, right knee
Billable Code

Decision Criteria

clinical Criteria

  • Objective instability findings on physical exam

documentation Criteria

  • Documentation of recent injury leading to instability

Applicable To

  • Acute instability due to recent injury

Excludes

Clinical Validation Requirements

  • Objective instability on exam (e.g., positive anterior drawer test)
  • Documentation of recent injury

Code-Specific Risks

  • Risk of using unspecified laterality code (M25.369)

Coding Notes

  • Ensure documentation specifies right knee and includes objective test results.

Ancillary Codes

Additional codes that should be used in conjunction with the main diagnosis codes when applicable.

Acute pain related to instability

G89.21
Use when acute pain is directly related to knee instability.

Presence of right artificial knee joint

Z96.651
Use post-ACL reconstruction to indicate graft status.

Differential Codes

Alternative codes to consider when ruling out similar conditions to the primary diagnosis.

Chronic instability, right knee

M23.51
Use for chronic instability from old ligament tears or recurrent dislocations.

Other instability, right knee

M25.361
Use for acute or subacute instability from recent injury.

Documentation & Coding Risks

Avoid these common documentation and coding issues when documenting Right Knee Instability to ensure proper reimbursement, maintain compliance, and reduce audit risk. These guidelines are particularly important when using ICD-10 code M25.361.

Impact

Clinical: Inadequate information for treatment planning., Regulatory: Non-compliance with documentation standards., Financial: Potential claim denials.

Mitigation Strategy

Include specific test results and history.

Impact

Reimbursement: Claims may be denied or delayed., Compliance: Non-compliance with ICD-10 specificity requirements., Data Quality: Inaccurate data for clinical and research purposes.

Mitigation Strategy

Specify 'right' in documentation and use M25.361.

Impact

Reimbursement: Improper sequencing can lead to denied claims., Compliance: Non-compliance with coding guidelines., Data Quality: Incomplete clinical picture.

Mitigation Strategy

Sequence S83.511A first for post-ACL tear instability.

Impact

Lack of documented objective tests can lead to audit failures.

Mitigation Strategy

Ensure all objective tests are documented with results.

Documentation errors, coding pitfalls, and audit risks are interconnected aspects of medical coding and billing. Addressing all three areas helps ensure accurate coding, optimal reimbursement, and regulatory compliance.

Frequently Asked Questions

Common questions about ICD-10 coding for Right Knee Instability, with expert answers to help guide accurate code selection and documentation.

Documentation Templates for Right Knee Instability

Use these documentation templates to ensure complete and accurate documentation for Right Knee Instability. These templates include all required elements for proper coding and billing.

Orthopedic Progress Note

Specialty: Orthopedics

Required Elements

  • Subjective findings
  • Objective test results
  • Assessment and plan

Example Documentation

**Subjective**: "Right knee gives way during pivoting, 3 episodes this week." **Objective**: - Positive Lachman test (10mm translation) - Grade II MCL laxity on valgus stress - MRI: Complete ACL tear (attached) **Assessment**: Right knee instability (M25.361) due to acute ACL tear (S83.511A) **Plan**: ACL reconstruction scheduled; prescribe L1852 knee brace.

Examples: Poor vs. Good Documentation

Poor Documentation Example
"Patient reports knee giving way."
Good Documentation Example
"Positive Lachman test with endpoint ‘mushy,’ 10mm translation."
Explanation
The good example includes specific test results, providing objective evidence of instability.

Need help with ICD-10 coding for Right Knee Instability? Ask your questions below.

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