HELLP syndrome (HELLP), unspecified trimester

This code represents HELLP syndrome, a severe obstetric complication characterized by Hemolysis, Elevated Liver enzymes, and Low Platelet count. It is a life-threatening variant of pre-eclampsia, often presenting with symptoms such as right upper quadrant pain, nausea, vomiting, and headache.

Use this code when the medical record explicitly documents a diagnosis of HELLP syndrome, and the specific trimester of pregnancy is not specified. This diagnosis typically arises in the late stages of pregnancy or immediately postpartum, requiring urgent medical intervention.

• Ensure documentation clearly states "HELLP syndrome" or lists the characteristic components (hemolysis, elevated liver enzymes, low platelets).
• If the trimester is documented, use the more specific O14.21, O14.22, or O14.23 codes.
• Always code any associated pre-eclampsia or eclampsia diagnoses in conjunction with HELLP syndrome.