- Postimmunization complication or reaction - see Complications, vaccination
- Postinfectious - see condition
- Postinfluenzal syndrome 780.79
- Postlaminectomy syndrome 722.80
- Postleukotomy syndrome 310.0
- Postlobectomy syndrome 310.0
- Postmastectomy lymphedema (syndrome) 457.0
- Postmaturity, postmature (fetus or newborn) (gestation period over 42 completed weeks) 766.22
- Postmeasles - see also condition
- Postmenopausal
- Postnasal drip 784.91
- Postnatal - see condition
- Postoperative - see also condition
- Postpancreatectomy hyperglycemia 251.3
- Postpartum - see also condition
- Postperfusion syndrome NEC 999.8
- Postpoliomyelitic - see condition
- Postsurgery status NEC (see also Status (post)) V45.89
- Posttraumatic - see condition
- Posttraumatic brain syndrome, nonpsychotic 310.2
- Postures, hysterical 300.11
- Postvaccinal reaction or complication - see Complications, vaccination
