N91: Absent, scanty and rare menstruation excludes1 ovarian dysfunction (E28.-) |
N91.0: Primary amenorrhea |
N91.1: Secondary amenorrhea |
N91.2: Amenorrhea, unspecified |
N91.3: Primary oligomenorrhea |
N91.4: Secondary oligomenorrhea |
N91.5: Oligomenorrhea, unspecified |