ICD-10 Code: N91.3 – Primary oligomenorrhea

ICD-10 code N91.3 corresponds to Primary oligomenorrhea. This code is classified under the chapter N91 Absent, scanty and rare menstruation, which is part of the N80-N98: Noninflammatory disorders of female genital tract category.

The parent chapter is Diseases of the genitourinary system.