ICD-10 Coding of Osteoarthritis | ICD-10 Coding Guidelines A: For the ICD-10 for osteoarthritis, the guidelines actually state that you should use the multiple osteoarthritis code unless the specific codes are more appropriate for the circumstantial coding, and basically it comes down to the payer rules. If you’re seeing a patient simply to manage their osteoarthritis and they’ve got osteoarthritis in multiple joints, maybe they got in their left shoulder, their right shoulder, their left elbow