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v1.0.0
ICD-10 Guide
DiagnosesRight Knee Arthritis

Right Knee Arthritis

ICD-10 Coding for Right Knee Arthritis(M17.11, M17.31)

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

Diagnosis Overview

What is Right Knee Arthritis?
Essential facts and insights about Right Knee Arthritis

Key Clinical Considerations:

  • Joint pain and stiffness, especially in the morning or after inactivity
  • X-ray findings showing joint space narrowing, osteophytes, and subchondral sclerosis
  • Swelling, tenderness, and decreased range of motion during physical examination

Clinical Information

Clinical Criteria & Documentation Requirements

  • Patient history including duration and severity of symptoms
  • Specific terminology such as 'osteoarthritis' or 'degenerative joint disease'
  • Examples include detailed descriptions of physical exam findings and imaging results

Coding Guidelines

Usage Guidelines & Examples

  • Follow usage guidelines for distinguishing between primary and secondary osteoarthritis.
  • Common errors include misclassifying the type of arthritis or omitting required documentation.

Code Exclusions

Important Exclusions

  • Rheumatoid arthritis, post-traumatic arthritis, and other inflammatory joint diseases.
  • Alternative codes may include M17.2 for bilateral knee osteoarthritis.

Related ICD-10 Codes

Primary Codes
M17.9
Osteoarthritis of knee, unspecified
M17.0
Osteoarthritis of knee, primary
M17.1
Osteoarthritis of knee, secondary
Ancillary Codes
M25.561
Z87.81
Differential Codes
M17.31
M17.11

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Orthopedics

Specialty Applications

  • Older adults, individuals with a history of joint injuries, and those with obesity.
  • Clinical settings include outpatient orthopedic clinics and rehabilitation 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 patient history, physical exam findings, and imaging results.

Billing considerations?

Ensure accurate coding to reflect the severity and type of arthritis for proper reimbursement.