N91.0

Primary amenorrhoea

Coding rules (TT06)

●Applies only/mainly to females

Coding guidance (WHO 2019)

Failure to start menstruation at puberty.

Sibling codes

N91Absent, scanty and rare menstruation N91.1Secondary amenorrhoea N91.2Amenorrhoea, unspecified N91.3Primary oligomenorrhoea N91.4Secondary oligomenorrhoea N91.5Oligomenorrhoea, unspecified