What ICD-10 Codes are Used for Amenorrhea
Amenorrhea refers to the absence of menstruation in women who are of reproductive age. This condition can be caused by various underlying factors, and for accurate diagnosis and billing purposes, the ICD-10 (International Classification of Diseases, 10th Revision) coding system provides specific codes to represent these causes.
Below are the clinical descriptions of some commonly used Amenorrhea ICD-10 codes:
- N91.0 - Primary Amenorrhea: This code is used when a female has not experienced menstruation by the age of 16 despite normal growth and secondary sexual characteristics.
- N91.1 - Secondary Amenorrhea: Secondary amenorrhea is the absence of menstruation for three or more consecutive cycles in women who have previously had a regular menstrual cycle.
- E28.8 - Other Ovarian Dysfunction: This code may be used for amenorrhea related to ovarian dysfunction not categorized elsewhere, such as polycystic ovary syndrome (PCOS) or premature ovarian failure.
- E28.2 - Polycystic Ovarian Syndrome (PCOS): PCOS is a common hormonal disorder in women, often causing amenorrhea or irregular periods, along with other symptoms like cystic ovaries and hyperandrogenism.
- E28.3 - Primary Ovarian Failure: Primary ovarian failure, also known as premature ovarian insufficiency, is a condition where the ovaries stop functioning before the age of 40, leading to amenorrhea and infertility.
- N91.2 - Oligomenorrhea: Oligomenorrhea is characterized by infrequent or irregular menstruation, which may lead to periods of amenorrhea.
- N91.4 - Hypothalamic Dysfunction: This code is used for amenorrhea associated with disorders affecting the hypothalamus, which is crucial in regulating the menstrual cycle.
- E28.0 - Estrogen Excess: Amenorrhea may result from excessive estrogen levels, which can be due to conditions like estrogen-producing tumors or hormone therapy side effects.
- N92.0 - Excessive and Frequent Menstruation with Regular Cycle: This code is used when there's concern about amenorrhea being caused by excessive or frequent menstruation within a regular cycle, suggesting a possible underlying issue.
- N91.3 - Secondary Amenorrhea Due to Pregnancy: Secondary amenorrhea can occur when pregnancy is the cause. This code indicates that the absence of menstruation is due to pregnancy.

