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Ch. 14: Diseases of the genitourinary system (N00-N99)
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Noninflammatory disorders of female genital tract (N80-N98)
› N91
N91
Absent, scanty and rare menstruation
ICD-10-CM category (non-billable header) code — part of Noninflammatory disorders of female genital tract (N80-N98)
Code Details
Billable
No — use a more specific child code
Chapter
Chapter 14: Diseases of the genitourinary system (N00-N99)
Section
Noninflammatory disorders of female genital tract (N80-N98)
Coding Notes
Excludes1 (never code both together)
ovarian dysfunction (E28.-)
Subcategories (6)
N91.0
Primary amenorrhea
N91.1
Secondary amenorrhea
N91.2
Amenorrhea, unspecified
N91.3
Primary oligomenorrhea
N91.4
Secondary oligomenorrhea
N91.5
Oligomenorrhea, unspecified
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