- Postcardiotomy syndrome 429.4
- Postcaval ureter 753.4
- Postcholecystectomy syndrome 576.0
- Postclimacteric bleeding 627.1
- Postcommissurotomy syndrome 429.4
- Postconcussional syndrome 310.2
- Postcontusional syndrome 310.2
- Postcricoid region - see condition
- Postencephalitic - see also condition
- Posterior - see condition
- Posterolateral sclerosis (spinal cord) - see Degeneration, combined
- Postexanthematous - see condition
- Postfebrile - see condition
- Postgastrectomy dumping syndrome 564.2
- Posthemiplegic chorea 344.89
- Posthemorrhagic anemia (chronic) 280.0
- Posthepatitis syndrome 780.79
- Postherpetic neuralgia (intercostal) (syndrome) (zoster) 053.19
- Posthitis 607.1
- Postimmunization complication or reaction - see Complications, vaccination
- Postinfectious - see condition
- Postinfluenzal syndrome 780.79