Oligomenorrhea, unspecified

This code signifies infrequent or light menstrual periods without further specification regarding the underlying cause or specific pattern. It indicates a menstrual cycle that is longer than 35 days but less than 6 months, or a reduced volume of menstrual flow. This diagnosis is typically made when more specific causes of menstrual irregularity have not been identified or documented.

Apply this code when documentation indicates "oligomenorrhea" without additional details that would allow for a more specific diagnosis. This is appropriate for initial evaluations of menstrual irregularities or when the provider has not yet determined a definitive etiology. Supporting documentation would include a physician's note stating oligomenorrhea, often in the context of a new patient visit for menstrual concerns.

• Do not use this code if a more specific cause of oligomenorrhea (e.g., polycystic ovarian syndrome, thyroid dysfunction) is documented.
• Consider sequencing this code as a primary diagnosis when the patient presents solely for evaluation of infrequent menses.
• Query the provider for more specific details if the documentation suggests an underlying condition but does not explicitly state it.