Symptoms and signs involving the circulatory and respiratory systems
Part of chapter 18, symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified.
About R00-R09
Block R00-R09 contains 8 categories and 58 billable codes for FY2027. No codes here changed in the FY2027 update. 1 codes are MCCs and 6 are CCs when reported as secondary diagnoses.