N91

Absent, scanty and rare menstruation

Non-billable header

N91 is a non-billable header code. Use one of the more specific codes below.

Excludes1

Not coded here — never report together with this code.

  • ovarian dysfunction (E28.-)

Excludes2

Not included here — may be reported together when both conditions exist.

  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)

More specific codes N91

  • N91.0Primary amenorrheaBillable
  • N91.1Secondary amenorrheaBillable
  • N91.2Amenorrhea, unspecifiedBillable
  • N91.3Primary oligomenorrheaBillable
  • N91.4Secondary oligomenorrheaBillable
  • N91.5Oligomenorrhea, unspecifiedBillable

Related codes

  • N80EndometriosisHeader
  • N81Female genital prolapseHeader
  • N82Fistulae involving female genital tractHeader
  • N83Noninflammatory disorders of ovary, fallopian tube and broad ligamentHeader
  • N84Polyp of female genital tractHeader
  • N85Other noninflammatory disorders of uterus, except cervixHeader
  • N86Erosion and ectropion of cervix uteriBillable
  • N87Dysplasia of cervix uteriHeader
  • N88Other noninflammatory disorders of cervix uteriHeader
  • N89Other noninflammatory disorders of vaginaHeader
  • N90Other noninflammatory disorders of vulva and perineumHeader
  • N92Excessive, frequent and irregular menstruationHeader
  • N93Other abnormal uterine and vaginal bleedingHeader
  • N94Pain and other conditions associated with female genital organs and menstrual cycleHeader
  • N95Menopausal and other perimenopausal disordersHeader
  • N96Recurrent pregnancy lossBillable
  • N97Female infertilityHeader
  • N98Complications associated with artificial fertilizationHeader

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