Question: Encounter notes indicate that a patient suffers from pauciarticular juvenile rheumatoid arthritis (PJRA) of the hip and knee. What is pauciarticular juvenile rheumatoid arthritis, and how do I choose a diagnosis code for the condition? AAPC Forum Subscriber Answer: According to Codify by AAPC, “pauciarticular juvenile rheumatoid arthritis, PJRA, as also called oligoarticular JRA, refers to the most common form of rheumatoid arthritis in children and affects four or fewer large joints.” On your claim, you’ll choose a code each from the following categories: Hip PJRA Knee PJRA