Hydatidiform mole, unspecified

This code represents a hydatidiform mole, a rare abnormal pregnancy characterized by the growth of an abnormal fertilized egg or an overgrowth of tissue from the placenta. In this condition, the placenta develops into a mass of cysts, and there is no viable fetus or an abnormal fetus that cannot survive. The "unspecified" nature indicates that the specific type of hydatidiform mole (e.g., complete or partial) has not been documented.

Use this code when the medical record clearly documents a diagnosis of a hydatidiform mole, but the provider has not specified whether it is a complete or partial mole. This diagnosis is typically made based on ultrasound findings and confirmed by histopathological examination of uterine contents. Documentation supporting its use would include pathology reports, ultrasound reports, and physician notes indicating the presence of a molar pregnancy without further specification.

• Avoid using this code if the documentation specifies the type of hydatidiform mole (e.g., complete or partial); instead, use the more specific codes in the O01 category.
• Always review pathology reports for definitive diagnosis and specification of mole type.
• Consider sequencing this code as the principal diagnosis when it is the primary reason for the encounter, such as for evacuation of the mole.