Primary amenorrhea

This code represents the absence of menarche (first menstruation) by age 15 in the presence of secondary sexual characteristics, or by age 13 in the absence of secondary sexual characteristics. It signifies a failure of menstruation to ever begin, rather than a cessation after it has started.

This code is appropriate for patients presenting with a lack of menstrual periods from puberty onward. Documentation should clearly indicate the patient's age and the absence of prior menses, along with any relevant findings regarding pubertal development.

• Differentiate from secondary amenorrhea (cessation of menses after menarche has occurred).
• Ensure documentation specifies "primary" amenorrhea to support this code.
• Consider additional codes for underlying causes, such as genetic disorders or anatomical abnormalities, if identified.