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Chapter 15: Pregnancy, childbirth and the puerperium (O00-O9A)

Code Range: O00 — O9A 9 Sections FY 2026

This chapter of the ICD-10-CM classification covers diagnosis codes from O00 through O9A. Browse the sections below to find specific diagnosis codes within this chapter.

Chapter Notes

  • CODES FROM THIS CHAPTER ARE FOR USE ONLY ON MATERNAL RECORDS, NEVER ON NEWBORN RECORDS
  • Codes from this chapter are for use for conditions related to or aggravated by the pregnancy, childbirth, or by the puerperium (maternal causes or obstetric causes)
  • Trimesters are counted from the first day of the last menstrual period. They are defined as follows:
  • 1st trimester- less than 14 weeks 0 days
  • 2nd trimester- 14 weeks 0 days to less than 28 weeks 0 days
  • 3rd trimester- 28 weeks 0 days until delivery

Excludes1 (not coded here):

  • supervision of normal pregnancy (Z34.-)

Excludes2 (not included here):

  • mental and behavioral disorders associated with the puerperium (F53.-)
  • obstetrical tetanus (A34)
  • postpartum necrosis of pituitary gland (E23.0)
  • puerperal osteomalacia (M83.0)

Sections

  • O00-O08 Pregnancy with abortive outcome (O00-O08)
    116 codes
  • O09 Supervision of high risk pregnancy (O09)
    85 codes
  • O10-O16 Edema, proteinuria and hypertensive disorders in pregnancy, childbirth and the puerperium (O10-O16)
    125 codes
  • O20-O29 Other maternal disorders predominantly related to pregnancy (O20-O29)
    343 codes
  • O30-O48 Maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48)
    579 codes
  • O60-O77 Complications of labor and delivery (O60-O77)
    144 codes
  • O80-O82 Encounter for delivery (O80-O82)
    2 codes
  • O85-O92 Complications predominantly related to the puerperium (O85-O92)
    150 codes
  • O94-O9A Other obstetric conditions, not elsewhere classified (O94-O9A)
    247 codes

Top-Level Codes in This Chapter

  • O00 Ectopic pregnancy
  • O01 Hydatidiform mole
  • O02 Other abnormal products of conception
  • O03 Spontaneous abortion
  • O04 Complications following (induced) termination of pregnancy
  • O07 Failed attempted termination of pregnancy
  • O08 Complications following ectopic and molar pregnancy
  • O09 Supervision of high risk pregnancy
  • O10 Pre-existing hypertension complicating pregnancy, childbirth and the puerperium
  • O11 Pre-existing hypertension with pre-eclampsia
  • O12 Gestational [pregnancy-induced] edema and proteinuria without hypertension
  • O13 Gestational [pregnancy-induced] hypertension without significant proteinuria
  • O14 Pre-eclampsia
  • O15 Eclampsia
  • O16 Unspecified maternal hypertension
  • O20 Hemorrhage in early pregnancy
  • O21 Excessive vomiting in pregnancy
  • O22 Venous complications and hemorrhoids in pregnancy
  • O23 Infections of genitourinary tract in pregnancy
  • O24 Diabetes mellitus in pregnancy, childbirth, and the puerperium
  • O25 Malnutrition in pregnancy, childbirth and the puerperium
  • O26 Maternal care for other conditions predominantly related to pregnancy
  • O28 Abnormal findings on antenatal screening of mother
  • O29 Complications of anesthesia during pregnancy
  • O30 Multiple gestation
  • O31 Complications specific to multiple gestation
  • O32 Maternal care for malpresentation of fetus
  • O33 Maternal care for disproportion
  • O34 Maternal care for abnormality of pelvic organs
  • O35 Maternal care for known or suspected fetal abnormality and damage
  • O36 Maternal care for other fetal problems
  • O40 Polyhydramnios
  • O41 Other disorders of amniotic fluid and membranes
  • O42 Premature rupture of membranes
  • O43 Placental disorders
  • O44 Placenta previa
  • O45 Premature separation of placenta [abruptio placentae]
  • O46 Antepartum hemorrhage, not elsewhere classified
  • O47 False labor
  • O48 Late pregnancy
  • O60 Preterm labor
  • O61 Failed induction of labor
  • O62 Abnormalities of forces of labor
  • O63 Long labor
  • O64 Obstructed labor due to malposition and malpresentation of fetus
  • O65 Obstructed labor due to maternal pelvic abnormality
  • O66 Other obstructed labor
  • O67 Labor and delivery complicated by intrapartum hemorrhage, not elsewhere classified
  • O68 Labor and delivery complicated by abnormality of fetal acid-base balance Billable
  • O69 Labor and delivery complicated by umbilical cord complications
  • O70 Perineal laceration during delivery
  • O71 Other obstetric trauma
  • O72 Postpartum hemorrhage
  • O73 Retained placenta and membranes, without hemorrhage
  • O74 Complications of anesthesia during labor and delivery
  • O75 Other complications of labor and delivery, not elsewhere classified
  • O76 Abnormality in fetal heart rate and rhythm complicating labor and delivery Billable
  • O77 Other fetal stress complicating labor and delivery
  • O80 Encounter for full-term uncomplicated delivery Billable
  • O82 Encounter for cesarean delivery without indication Billable
  • O85 Puerperal sepsis Billable
  • O86 Other puerperal infections
  • O87 Venous complications and hemorrhoids in the puerperium
  • O88 Obstetric embolism
  • O89 Complications of anesthesia during the puerperium
  • O90 Complications of the puerperium, not elsewhere classified
  • O91 Infections of breast associated with pregnancy, the puerperium and lactation
  • O92 Other disorders of breast and disorders of lactation associated with pregnancy and the puerperium
  • O94 Sequelae of complication of pregnancy, childbirth, and the puerperium Billable
  • O98 Maternal infectious and parasitic diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium
  • O99 Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium
  • O9A Maternal malignant neoplasms, traumatic injuries and abuse classifiable elsewhere but complicating pregnancy, childbirth and the puerperium

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