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 3: Diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism
- D89.810Acute graft-versus-host disease
- D89.811Chronic graft-versus-host disease
- D89.812Acute on chronic graft-versus-host disease
- D89.813Graft-versus-host disease, unspecified
- D89.831Cytokine release syndrome, grade 1
- D89.832Cytokine release syndrome, grade 2
- D89.833Cytokine release syndrome, grade 3
- D89.834Cytokine release syndrome, grade 4
- D89.835Cytokine release syndrome, grade 5
- D89.839Cytokine release syndrome, grade unspecified