N91.3

Primary oligomenorrhoea

Coding rules (TT06)

●Applies only/mainly to females

Coding guidance (WHO 2019)

Menstruation which is scanty or rare from the start.

Sibling codes

N91Absent, scanty and rare menstruation N91.0Primary amenorrhoea N91.1Secondary amenorrhoea N91.2Amenorrhoea, unspecified N91.4Secondary oligomenorrhoea N91.5Oligomenorrhoea, unspecified