ICD-10 diagnosis code

N91 Absent, scanty and rare menstruation

N91 is the ICD-10 code for Absent, scanty and rare menstruation. It is a three-character category divided into 6 subcodes; use the subcode whenever the record supports that level of detail. It belongs to the block N80–N98 (Noninflammatory disorders of female genital tract) in Chapter XIV, Diseases of the genitourinary system.

Code type: Category (3 characters)
Chapter: XIV · N00–N99
Classification: WHO ICD-10, 2019 version

What N91 excludes

Conditions that look similar but belong under another code.

ovarian dysfunction E28.-

Subcodes of N91

N91 in national editions

Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.

SwedenICD-10-SE

N91Utebliven, sparsam och gles menstruation

DenmarkICD-10-DK

DN91Manglende, sparsom og sjælden menstruation

FinlandICD-10-FI

N91Puuttuvat, niukat tai harvat kuukautiset

GermanyICD-10-GM

N91Ausgebliebene, zu schwache oder zu seltene Menstruation

FranceICD-10-FR

N91Aménorrhée, oligoménorrhée et hypoménorrhée

NetherlandsICD-10-NL

N91afwezige, geringe en weinig frequente menstruatie

Based on the World Health Organization’s International Statistical Classification of Diseases and Related Health Problems, 10th revision (ICD-10), 2019 version, and the national editions published by each country’s health authority. This page is a reference, not coding advice; follow your national coding rules when you report.

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