Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium (O10-O16)

ICD-10 codes O10 to O16 cover a range of hypertensive disorders, edema, and proteinuria occurring during pregnancy, childbirth, and the puerperium. These codes are specifically used to document complications from pre-existing hypertension, gestational hypertension, pre-eclampsia, eclampsia, and related conditions affecting maternal and fetal health.

This chapter includes detailed coding for conditions such as pre-existing essential hypertension (O10.0), often referred to as benign or malignant hypertension complicating pregnancy, childbirth, or the postpartum period. It also covers hypertensive heart disease (O10.1), chronic kidney disease linked to hypertension (O10.2), and combinations of these complications during different pregnancy stages. Codes for pre-eclampsia (O14), including mild, severe, and HELLP syndrome, identify hypertension with proteinuria and liver or platelet abnormalities during pregnancy. Gestational edema and proteinuria without hypertension (O12 codes), along with gestational hypertension without proteinuria (O13 codes), reflect pregnancy-induced disorders distinguished by presence or absence of significant protein in the urine. The range also includes unspecified maternal hypertension (O16), aiding documentation when specific causes or timing are unclear. Using synonyms like "pregnancy-induced hypertension," "eclampsia," and "gestational proteinuria" helps coders correctly assign these precise codes to maternal hypertensive complications in obstetrics.