Scanty or infrequent menstruation

This code represents oligomenorrhea, a menstrual disorder characterized by abnormally long intervals between menses, typically exceeding 35 days, or fewer than nine menstrual periods in a year. It indicates a reduced frequency of menstrual bleeding, which can be a symptom of various underlying endocrine, reproductive, or systemic conditions.

Use this code when documentation clearly indicates infrequent or scanty menstrual periods as the primary diagnosis or a significant presenting symptom. This applies to patients experiencing cycles longer than 35 days or fewer than 9 cycles annually, as documented by the physician. Support for this code includes patient history, menstrual calendars, and physician notes detailing the abnormal menstrual pattern.

• Differentiate from amenorrhea (absence of menstruation) or polymenorrhea (frequent menstruation).
• Always look for and code any underlying cause if identified, such as polycystic ovarian syndrome (PCOS) or endocrine disorders, as a primary diagnosis.
• Ensure the documentation specifies "infrequent" or "scanty" menstruation, not just irregular, to support this specific code.