Pauciarticular juvenile rheumatoid arthritis, unsp site

This code signifies a chronic inflammatory arthritis affecting five or fewer joints, with onset before 16 years of age. It is a subtype of juvenile idiopathic arthritis (JIA) characterized by its limited joint involvement. The "unspecified site" indicates that the specific joints affected are not documented or are not relevant for this particular code.

Use this code when documentation confirms a diagnosis of pauciarticular juvenile rheumatoid arthritis, and the medical record does not specify the particular anatomical site(s) of involvement. This is appropriate when the physician has diagnosed pauciarticular JIA but has not detailed which specific joints are affected, or if the documentation is insufficient to assign a more specific site code.

• Avoid using this code if the specific joint(s) affected are clearly documented; instead, use a more precise code from the M08.4 subcategory that specifies the anatomical site.
• Ensure the patient's age at onset is clearly documented as under 16 years to support a JIA diagnosis.
• This code should be sequenced as a primary diagnosis when it is the reason for the encounter or as a secondary diagnosis when it is a co-morbidity impacting care.