2,667 codes
Unacceptable principal diagnosis codes
Codes that describe a circumstance influencing health status rather than a current illness, so they are unacceptable as the principal diagnosis for an inpatient stay. Source: Medicare Code Editor (MCE) v44, effective October 1, 2026.
Chapter 9: Diseases of the circulatory system
- I25.82Chronic total occlusion of coronary artery
- I25.83Coronary atherosclerosis due to lipid rich plaque
- I25.84Coronary atherosclerosis due to calcified coronary lesion
- I26.01Septic pulmonary embolism with acute cor pulmonale
- I26.03Cement embolism of pulmonary artery with acute cor pulmonale
- I26.90Septic pulmonary embolism without acute cor pulmonale
- I26.95Cement embolism of pulmonary artery without acute cor pulmonale
- I31.4Cardiac tamponade
- I46.2Cardiac arrest due to underlying cardiac condition
- I46.8Cardiac arrest due to other underlying condition
- I70.92Chronic total occlusion of artery of the extremities
- I76Septic arterial embolism