Knee pain is a common condition that affects people of all ages, from athletes to seniors. Whether caused by injury, arthritis, or other medical conditions, proper diagnosis and coding are essential for effective treatment and insurance claims. The ICD (International Classification of Diseases) code for knee pain helps healthcare providers and insurance companies classify and track knee-related conditions accurately.
In this article, we’ll explore the ICD code for knee pain, its importance in medical billing, and how different knee conditions are classified.
What is the ICD Code for Knee Pain?

The ICD-10 code for knee pain is M25.561 (Pain in right knee) and M25.562 (Pain in left knee). If the pain affects both knees, the ICD code is M25.569 (Pain in unspecified knee).
These codes fall under the M25 category, which represents other joint disorders.
Why is the ICD Code for Knee Pain Important?
- Medical Documentation: Helps healthcare professionals record and diagnose knee pain accurately.
- Insurance and Billing: Used by medical billing departments to ensure proper reimbursement for treatments.
- Treatment Planning: Allows doctors to track the progress of knee conditions and adjust treatments accordingly.
Common Knee Conditions and Their ICD-10 Codes
Knee pain can result from various conditions, each with a specific ICD-10 code. Here are some of the most common ones:
1. Osteoarthritis of the Knee
- M17.0 – Bilateral primary osteoarthritis of the knee
- M17.11 – Unilateral primary osteoarthritis of the right knee
- M17.12 – Unilateral primary osteoarthritis of the left knee
2. Knee Injuries and Disorders
- S83.511 – Sprain of anterior cruciate ligament (ACL) of the right knee
- S83.512 – Sprain of anterior cruciate ligament (ACL) of the left knee
- M23.8X1 – Other internal derangements of the right knee
- M23.8X2 – Other internal derangements of the left knee
3. Rheumatoid Arthritis of the Knee
- M06.061 – Rheumatoid arthritis of the right knee
- M06.062 – Rheumatoid arthritis of the left knee
4. Patellofemoral Pain Syndrome (Runner’s Knee)
- M22.2X1 – Patellofemoral disorders of the right knee
- M22.2X2 – Patellofemoral disorders of the left knee
5. Post-Surgical and Chronic Pain
- G89.18 – Other acute postprocedural pain
- G89.29 – Other chronic pain
These codes help doctors and medical professionals pinpoint the exact cause of knee pain for better treatment and insurance documentation.
Also Read: What Helps Nerve Pain After Knee Replacement – A Detailed Overview!
How is the ICD Code Used in Diagnosis and Treatment?
When you visit a doctor for knee pain, they will:
- Conduct a physical examination and ask about your symptoms.
- Use imaging tests (X-rays, MRIs) to identify the cause of pain.
- Assign the appropriate ICD-10 code based on your diagnosis.
- Plan a treatment strategy that may include medication, physical therapy, or surgery.
- Use the code for insurance claims and medical records.
FAQ’s
1. What is the ICD-10 code for knee pain?
The ICD-10 code for knee pain is M25.561 (pain in the right knee), M25.562 (pain in the left knee), and M25.569 (pain in an unspecified knee).
2. Why is the ICD code important for knee pain?
ICD codes help in accurate medical documentation, insurance billing, and treatment planning, ensuring proper diagnosis and reimbursement.
3. What ICD-10 codes are used for osteoarthritis of the knee?
- M17.0 – Bilateral primary osteoarthritis of the knee
- M17.11 – Unilateral primary osteoarthritis of the right knee
- M17.12 – Unilateral primary osteoarthritis of the left knee
4. Can ICD codes be used for knee injuries?
Yes, specific ICD codes exist for ACL sprains, internal knee derangements, and post-surgical pain, such as S83.511 (ACL sprain, right knee) and S83.512 (ACL sprain, left knee).
5. How do doctors determine the correct ICD code for knee pain?
Doctors examine symptoms, use imaging tests (X-rays, MRIs), and diagnose the condition before assigning the appropriate ICD-10 code.
6. Are there ICD codes for post-surgical knee pain?
Yes, ICD-10 codes like G89.18 (other acute postprocedural pain) and G89.29 (other chronic pain) classify post-surgical knee pain.
7. Can ICD codes help in getting insurance coverage for knee treatments?
Yes, ICD codes ensure that medical treatments and procedures for knee pain are properly documented for insurance claims and reimbursements.
8. Where can I find the right ICD code for my knee pain?
A healthcare provider or medical coder can determine the correct ICD-10 code based on your diagnosis, symptoms, and medical history.
Final Thoughts
Understanding the ICD code for knee pain is crucial for accurate diagnosis, proper billing, and effective treatment. Whether you have arthritis, an injury, or chronic knee pain, knowing the right ICD-10 code can help streamline medical processes. If you’re unsure about your knee pain, consult a healthcare provider to get a precise diagnosis and the correct ICD code for your condition.