COMPLICATIONS MAINLY RELATED TO PREGNANCY (640-649)
Includes:
the listed conditions even if they arose or were present during labor, delivery, or the puerperium
The following fifth-digit subclassification is for use with categories 640-649 to denote the current episode of care:
0 unspecified as to episode of care or not applicable
1 delivered, with or without mention of antepartum condition
Antepartum condition with delivery
Delivery NOS (with mention of antepartum complication during current episode of care)
Intrapartum
obstetric condition (with mention of antepartum complication during current episode of care)
Pregnancy, delivered (with mention of antepartum complication during current episode of care)
2 delivered, with mention of postpartum complication
Delivery with mention of puerperal complication during current episode of care
3 antepartum condition or complication
Antepartum obstetric condition, not delivered during the current episode of care
4 postpartum condition or complication
Postpartum or puerperal obstetric condition or complication following delivery that occurred:
during previous episode of care
outside hospital, with subsequent admission for observation or care
642 Hypertension complicating pregnancy, childbirth, and the puerperium
Requires fifth digit; valid digits are in [brackets] under each code. see beginning of section 640-649 for definitions.
642.0: Benign essential hypertension complicating pregnancy, childbirth, and the puerperium
[0-4]
Hypertension:
benign essential specified as complicating, or as a reason for obstetric care during pregnancy, childbirth, or the puerperium
chronic NOS specified as complicating, or as a reason for obstetric care during pregnancy, childbirth, or the puerperium
essential specified as complicating, or as a reason for obstetric care during pregnancy, childbirth, or the puerperium
pre-existing NOS specified as complicating, or as a reason for obstetric care during pregnancy, childbirth, or the puerperium
642.1: Hypertension secondary to renal disease, complicating pregnancy, childbirth, and the puerperium
[0-4]
Hypertension secondary to renal disease, specified as complicating, or as a reason for obstetric care during pregnancy, childbirth, or the puerperium
642.2: Other pre-existing hypertension complicating pregnancy, childbirth, and the puerperium
[0-4]
Hypertensive:
heart and chronic kidney disease specified as complicating, or as a reason for obstetric care during pregnancy, childbirth, or the puerperium
heart disease specified as complicating, or as a reason for obstetric care during pregnancy, childbirth, or the puerperium
chronic kidney disease specified as complicating, or as a reason for obstetric care during pregnancy, childbirth, or the puerperium
Malignant hypertension specified as complicating, or as a reason for obstetric care during pregnancy, childbirth, or the puerperium
642.3: Transient hypertension of pregnancy
[0-4]
Gestational hypertension
Transient hypertension, so described, in pregnancy, childbirth, or the puerperium
642.4: Mild or unspecified pre-eclampsia
[0-4]
Hypertension in pregnancy, childbirth, or the puerperium, not specified as pre-existing, with either albuminuria or edema, or both; mild or unspecified
Pre-eclampsia:
NOS
mild
Toxemia (pre-eclamptic):
NOS
mild
Excludes:
albuminuria in pregnancy, without mention of hypertension (646.2)
edema in pregnancy, without mention of hypertension (646.1)
642.5: Severe pre-eclampsia
[0-4]
Hypertension in pregnancy, childbirth, or the puerperium, not specified as pre-existing, with either albuminuria or edema, or both; specified as severe
Pre-eclampsia, severe
Toxemia (pre-eclamptic), severe
642.6: Eclampsia
[0-4]
Toxemia:
eclamptic
with convulsions
642.7: Pre-eclampsia or eclampsia superimposed on pre-existing hypertension
[0-4]
Conditions classifiable to 642.4-642.6, with conditions classifiable to 642.0-642.2
642.9: Unspecified hypertension complicating pregnancy, childbirth, or the puerperium
[0-4]
Hypertension NOS, without mention of albuminuria or edema, complicating pregnancy, childbirth, or the puerperium

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