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ICD-10 Code M25.561

What is the code M25.561? 

M25.561 is a billable/specific ICD-10-CM code used to denote "Pain in right knee." It falls under the chapter of diseases of the musculoskeletal system and connective tissue, specifically category M25 Other joint disorder, not elsewhere classified. This code is applicable for clinical documentation and billing purposes, indicating that a patient is experiencing pain localized to the right knee.

Detailed description of M25.561 

This code is used to document instances where a patient presents with pain that is specifically located in the right knee that has not been attributed to a definitive underlying condition.

Symptoms commonly associated with M25.561 

Patients with pain in the right knee may report:

  • Persistent or intermittent pain localized to the right knee
  • Swelling or inflammation in the knee area
  • Decreased range of motion
  • Pain that worsens with activity or movement
  • Stiffness, especially after periods of inactivity or rest
  • M25.562 (Pain in left knee): Identifies pain specifically located in the left knee.
  • M25.569 (Pain in unspecified knee): Used when the affected knee is not specified. These codes help healthcare providers specify the site of the pain for accurate diagnosis and treatment.

Appropriate usage of M25.561 for billing 

M25.561 should be used for billing purposes when the patient's clinical evaluation confirms pain in the right knee without a more specific diagnosis. Documentation should include detailed descriptions of the pain and results from physical examinations or imaging studies, but it is not necessary for billing purposes.

Instructional guidelines for providers coding ICD-M25.561

For coding with ICD-M25.561, documenting right knee pain in the assessment portion of the medical note is mandatory. While additional information on the pain's characteristics, related symptoms, and diagnostic tests can be beneficial clinically, they are not required for billing.

M25.561 can be paired with codes from category G89, which detail whether the pain is acute or chronic. The decision to use M25.561 alongside a G89 code should be guided by the specific details of the clinical encounter, ensuring accurate documentation and effective patient care.

Common pitfalls in coding with M25.561

  • Misclassifying the side of the knee pain which can lead to incorrect treatment or follow-up.
  • Failing to update the diagnosis if further testing reveals a more specific underlying cause that warrants a different ICD-10 code.

Key resources for M25.561 coding


The ICD-10-CM code M25.561 is used for accurately documenting cases of pain in the right knee. Proper use of this code supports effective patient management by ensuring accurate diagnosis and facilitating appropriate treatment strategies.

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