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ICD-10 Coding for Osteoarthritis of the Right Knee(M17.11, M17.31)

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

Also known as:

Degenerative Joint Disease of the Right KneeWear-and-Tear Arthritis of the Right KneeOA Right KneeDegenerative Joint Disease Right Knee

Related ICD-10 Code Ranges

Complete code families applicable to Osteoarthritis of the Right Knee

M15-M19Primary Range

Osteoarthritis

This range includes all osteoarthritis codes, with M17.11 specifically for unilateral primary osteoarthritis of the right knee.

Code Comparison: When to Use Each Code

Compare key differences between these codes to ensure accurate selection

CodeDescriptionWhen to UseKey Documentation
M17.11Unilateral primary osteoarthritis, right kneeUse when the patient has primary osteoarthritis in the right knee without a history of trauma.
  • Morning stiffness <30 min
  • Crepitus
  • Bony enlargement
  • + 1 more
M17.31Unilateral post-traumatic osteoarthritis, right kneeUse when osteoarthritis is due to a previous injury or surgery on the right knee.
  • History of trauma or surgery
  • Instability on exam
  • MRI showing chondral loss

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 osteoarthritis right knee

Essential facts and insights about Osteoarthritis of the Right Knee

The ICD-10 code for unilateral primary osteoarthritis of the right knee is M17.11. For post-traumatic cases, use M17.31.

Primary ICD-10-CM Codes for osteoarthritis right knee

Unilateral primary osteoarthritis, right knee
Billable Code

Decision Criteria

clinical Criteria

  • Presence of primary osteoarthritis symptoms without trauma history.

documentation Criteria

  • Explicit mention of 'primary osteoarthritis' and 'right knee' in the medical record.

Applicable To

  • Primary osteoarthritis of the right knee

Excludes

  • Post-traumatic osteoarthritis (M17.31)

Clinical Validation Requirements

  • Morning stiffness <30 min
  • Crepitus
  • Bony enlargement
  • Kellgren-Lawrence Grade ≥2 on X-ray

Code-Specific Risks

  • Incorrectly coding as secondary osteoarthritis without evidence of underlying condition.

Coding Notes

  • Ensure documentation specifies 'primary' and 'right knee' to avoid unspecified coding.

Ancillary Codes

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

Pain in right knee

M25.561
Use if pain management is a separate focus of care.

Differential Codes

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

Unilateral post-traumatic osteoarthritis, right knee

M17.31
Use when there is a documented history of trauma or surgery leading to osteoarthritis.

Unilateral primary osteoarthritis, right knee

M17.11
Use when there is no history of trauma or surgery.

Documentation & Coding Risks

Avoid these common documentation and coding issues when documenting Osteoarthritis of the Right Knee to ensure proper reimbursement, maintain compliance, and reduce audit risk. These guidelines are particularly important when using ICD-10 code M17.11.

Impact

Clinical: May lead to inappropriate treatment plans., Regulatory: Non-compliance with coding guidelines., Financial: Potential for denied claims due to incomplete coding.

Mitigation Strategy

Always document the underlying condition when coding secondary OA., Use templates to ensure all necessary information is captured.

Impact

Reimbursement: May lead to reduced reimbursement due to unspecified coding., Compliance: Non-compliance with specificity requirements., Data Quality: Decreases accuracy of clinical data.

Mitigation Strategy

Ensure 'primary OA' and 'right knee' are in the same sentence.

Impact

Using unspecified codes when specific laterality and type are documented.

Mitigation Strategy

Implement documentation checks to ensure specificity.

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 Osteoarthritis of the Right Knee, with expert answers to help guide accurate code selection and documentation.

Documentation Templates for Osteoarthritis of the Right Knee

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

Orthopedic assessment for primary OA

Specialty: Orthopedics

Required Elements

  • Patient history
  • Physical examination
  • Imaging results
  • Diagnosis

Example Documentation

**Subjective**: '72yo F with 8-month history of right knee pain worsening with weight-bearing. No trauma history. BMI 37.2.' **Objective**: 'Gait: Antalgic favoring right leg. ROM: 0-105° flexion (pain at 90°). Imaging: KL Grade 3 OA on weight-bearing X-ray [Attached].' **Assessment**: 'Primary osteoarthritis right knee (M17.11). Morbid obesity (E66.01).' **Plan**: 'Intra-articular corticosteroid injection (20611-RT). Referral to weight management (Z68.35).'

Examples: Poor vs. Good Documentation

Poor Documentation Example
Right knee arthritis.
Good Documentation Example
Primary osteoarthritis of the right knee confirmed by weight-bearing X-ray showing joint space narrowing (JSN) ≥2mm.
Explanation
The good example provides specific diagnostic criteria and imaging confirmation, which are necessary for accurate coding.

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

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