N91
N91: Absent, scanty and rare menstruation
Non-billable headerICD-10-CM
N91 is a non-billable header ICD-10-CM code for absent, scanty and rare menstruation. It cannot be billed on its own: choose one of the more specific child codes below.
Excludes1: never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
- ovarian dysfunction (E28.-)
Other codes that can never be billed with N91
Their own Excludes1 notes name this code, so the conflict is not listed above.
- N92.6Irregular menstruation, unspecified
Risk adjustment
No CMS-HCC V28 category: this code does not change a RAF score.
Code history
Unchanged in every release from FY2024 to FY2027.
Code to one of these instead N91
6 child codes. Green means billable.