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ICD-10-CM Book 2026 Edition
Chapters
/
Chapter 14
/
N80-N98
/ N91
Show child codes
Show code details
N91
Absent, scanty and rare menstruation
Excludes1
ovarian dysfunction (
E28.-
)
N91.0
Primary amenorrhea
sex
Female
N91.1
Secondary amenorrhea
sex
Female
N91.2
Amenorrhea, unspecified
sex
Female
N91.3
Primary oligomenorrhea
sex
Female
N91.4
Secondary oligomenorrhea
sex
Female
N91.5
Oligomenorrhea, unspecified
Hypomenorrhea NOS
sex
Female
N91
N91
N91.0