ICD-10-CM Excludes1 Notes · Chapter 15 · FY 2027 O00-O9A

Excludes1 Notes in Chapter 15: Pregnancy, childbirth and the puerperium ICD-10-CM

An Excludes1 note means "NOT CODED HERE": the excluded code should never be reported together with the code above the note. In Chapter 15 (O00-O9A), notes printed in the chapter name other codes 149 times, and Excludes1 Notes anywhere in the Tabular List name the chapter’s codes 285 times, covering 172 distinct codes, categories and ranges. Switch views to read the list either way.

✓ From the official FY 2027 ICD-10-CM Tabular ListDefinitions follow the Official Guidelines, Section I.A
149
References in Its Notes
285
References to Its Codes
172
Chapter Codes Named
O00-O9A
Chapter 15
Chapter 15

Excludes1 Notes by the code that carries the note

85 of 85 shown
  • Chapter note Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium applies to 2,481 codes
    • supervision of normal pregnancy (Z34.-)
  • Block note Block O00-O08 Pregnancy with abortive outcome applies to 110 codes
    • continuing pregnancy in multiple gestation after abortion of one fetus or more (O31.1-, O31.3-)
  • O00.0 Abdominal pregnancy applies to 2 codes
    • maternal care for viable fetus in abdominal pregnancy (O36.7-)
  • O01 Hydatidiform mole applies to 3 codes
    • chorioadenoma (destruens) (D39.2)
    • malignant hydatidiform mole (D39.2)
  • O02 Other abnormal products of conception applies to 5 codes
  • O02.1 Missed abortion
    • failed induced abortion (O07.-)
    • fetal death (intrauterine) (late) (O36.4)
    • missed abortion with blighted ovum (O02.0)
    • missed abortion with hydatidiform mole (O01.-)
    • missed abortion with nonhydatidiform (O02.0)
    • missed abortion with other abnormal products of conception (O02.8-)
    • missed delivery (O36.4)
    • stillbirth (P95)
  • O02.8 Other specified abnormal products of conception applies to 2 codes
    • abnormal products of conception with blighted ovum (O02.0)
    • abnormal products of conception with hydatidiform mole (O01.-)
    • abnormal products of conception with nonhydatidiform mole (O02.0)
  • O03.0 Genital tract and pelvic infection following incomplete spontaneous abortion
    • sepsis following incomplete spontaneous abortion (O03.37)
    • urinary tract infection following incomplete spontaneous abortion (O03.38)
  • O03.31 Shock following incomplete spontaneous abortion
    • shock due to infection following incomplete spontaneous abortion (O03.37)
  • O03.37 Sepsis following incomplete spontaneous abortion
    • septic or septicopyemic embolism following incomplete spontaneous abortion (O03.2)
  • O03.5 Genital tract and pelvic infection following complete or unspecified spontaneous abortion
    • sepsis following complete or unspecified spontaneous abortion (O03.87)
    • urinary tract infection following complete or unspecified spontaneous abortion (O03.88)
  • O03.81 Shock following complete or unspecified spontaneous abortion
    • shock due to infection following complete or unspecified spontaneous abortion (O03.87)
  • O03.87 Sepsis following complete or unspecified spontaneous abortion
    • septic or septicopyemic embolism following complete or unspecified spontaneous abortion (O03.7)
  • O04.5 Genital tract and pelvic infection following (induced) termination of pregnancy
    • sepsis following (induced) termination of pregnancy (O04.87)
    • urinary tract infection following (induced) termination of pregnancy (O04.88)
  • O04.81 Shock following (induced) termination of pregnancy
    • shock due to infection following (induced) termination of pregnancy (O04.87)
  • O04.87 Sepsis following (induced) termination of pregnancy
    • septic or septicopyemic embolism following (induced) termination of pregnancy (O04.7)
  • O07 Failed attempted termination of pregnancy applies to 14 codes
    • incomplete spontaneous abortion (O03.0-)
  • O07.0 Genital tract and pelvic infection following failed attempted termination of pregnancy
    • sepsis following failed attempted termination of pregnancy (O07.37)
    • urinary tract infection following failed attempted termination of pregnancy (O07.38)
  • O07.31 Shock following failed attempted termination of pregnancy
    • shock due to infection following failed attempted termination of pregnancy (O07.37)
  • O07.37 Sepsis following failed attempted termination of pregnancy
    • septic or septicopyemic embolism following failed attempted termination of pregnancy (O07.2)
  • O08.0 Genital tract and pelvic infection following ectopic and molar pregnancy
    • sepsis following ectopic and molar pregnancy (O08.82)
    • urinary tract infection (O08.83)
  • O08.1 Delayed or excessive hemorrhage following ectopic and molar pregnancy
    • delayed or excessive hemorrhage due to incomplete abortion (O03.1)
  • O08.3 Shock following ectopic and molar pregnancy
    • shock due to infection following ectopic and molar pregnancy (O08.82)
  • O08.82 Sepsis following ectopic and molar pregnancy
    • septic or septicopyemic embolism following ectopic and molar pregnancy (O08.2)
  • O09.829 Supervision of pregnancy with history of in utero procedure during previous pregnancy, unspecified trimester
    • supervision of pregnancy affected by in utero procedure during current pregnancy (O35.7)
  • O14 Pre-eclampsia applies to 20 codes
    • pre-existing hypertension with pre-eclampsia (O11)
  • O14.1 Severe pre-eclampsia applies to 5 codes
  • O20 Hemorrhage in early pregnancy applies to 3 codes
    • pregnancy with abortive outcome (O00-O08)
  • O22 Venous complications and hemorrhoids in pregnancy applies to 32 codes
    • abortion NOS (O03.9)
    • ectopic or molar pregnancy (O08.7)
    • failed attempted abortion (O07.35)
    • induced abortion (O04.85)
    • spontaneous abortion (O03.89)
  • O26.7 Subluxation of symphysis (pubis) in pregnancy, childbirth and the puerperium applies to 6 codes
    • traumatic separation of symphysis (pubis) during childbirth (O71.6)
  • O26.84 Uterine size-date discrepancy complicating pregnancy applies to 4 codes
    • encounter for suspected problem with fetal growth ruled out (Z03.74)
  • O26.87 Cervical shortening applies to 3 codes
    • encounter for suspected cervical shortening ruled out (Z03.75)
  • O30.01 Twin pregnancy, monochorionic/monoamniotic applies to 4 codes
  • O32 Maternal care for malpresentation of fetus applies to 56 codes
    • malpresentation of fetus with obstructed labor (O64.-)
  • O32.1 Maternal care for breech presentation applies to 7 codes
    • footling presentation (O32.8)
    • incomplete breech (O32.8)
  • O33 Maternal care for disproportion applies to 40 codes
    • disproportion with obstructed labor (O65-O66)
  • O33.7 Maternal care for disproportion due to other fetal deformities applies to 7 codes
    • obstructed labor due to other fetal deformities (O66.3)
  • O35 Maternal care for known or suspected fetal abnormality and damage applies to 231 codes
    • encounter for suspected maternal and fetal conditions ruled out (Z03.7-)
  • O36 Maternal care for other fetal problems applies to 399 codes
    • encounter for suspected maternal and fetal conditions ruled out (Z03.7-)
    • placental transfusion syndromes (O43.0-)
  • O36.2 Maternal care for hydrops fetalis applies to 28 codes
    • hydrops fetalis associated with ABO isoimmunization (O36.1-)
    • hydrops fetalis associated with rhesus isoimmunization (O36.0-)
  • O36.4 Maternal care for intrauterine death applies to 7 codes
  • O40 Polyhydramnios applies to 28 codes
    • encounter for suspected maternal and fetal conditions ruled out (Z03.7-)
  • O41 Other disorders of amniotic fluid and membranes applies to 168 codes
    • encounter for suspected maternal and fetal conditions ruled out (Z03.7-)
  • O43.2 Morbidly adherent placenta applies to 12 codes
    • retained placenta (O73.-)
  • O44.1 Complete placenta previa with hemorrhage applies to 4 codes
    • labor and delivery complicated by hemorrhage from vasa previa (O69.4)
  • O46 Antepartum hemorrhage, not elsewhere classified applies to 24 codes
    • hemorrhage in early pregnancy (O20.-)
    • intrapartum hemorrhage NEC (O67.-)
    • placenta previa (O44.-)
    • premature separation of placenta [abruptio placentae] (O45.-)
  • O47 False labor applies to 5 codes
  • O60 Preterm labor applies to 52 codes
  • O62.2 Other uterine inertia
    • atony of uterus with hemorrhage (postpartum) (O72.1)
    • postpartum atony of uterus without hemorrhage (O75.89)
  • O62.4 Hypertonic, incoordinate, and prolonged uterine contractions
    • dystocia (fetal) (maternal) NOS (O66.9)
  • O64.4 Obstructed labor due to shoulder presentation applies to 7 codes
    • impacted shoulders (O66.0)
    • shoulder dystocia (O66.0)
  • O65.4 Obstructed labor due to fetopelvic disproportion, unspecified
    • dystocia due to abnormality of fetus (O66.2-O66.3)
  • O67 Labor and delivery complicated by intrapartum hemorrhage, not elsewhere classified applies to 3 codes
    • antepartum hemorrhage NEC (O46.-)
    • placenta previa (O44.-)
    • premature separation of placenta [abruptio placentae] (O45.-)
  • O68 Labor and delivery complicated by abnormality of fetal acid-base balance
    • fetal stress NOS (O77.9)
    • labor and delivery complicated by electrocardiographic evidence of fetal stress (O77.8)
    • labor and delivery complicated by ultrasonic evidence of fetal stress (O77.8)
  • O69.1 Labor and delivery complicated by cord around neck, with compression applies to 7 codes
    • labor and delivery complicated by cord around neck, without compression (O69.81)
  • O69.2 Labor and delivery complicated by other cord entanglement, with compression applies to 7 codes
    • labor and delivery complicated by other cord entanglement, without compression (O69.82)
  • O70 Perineal laceration during delivery applies to 9 codes
    • obstetric high vaginal laceration alone (O71.4)
  • O70.1 Second degree perineal laceration during delivery
    • perineal laceration involving anal sphincter (O70.2-)
  • O70.2 Third degree perineal laceration during delivery applies to 4 codes
    • anal sphincter tear during delivery without third degree perineal laceration (O70.4)
    • perineal laceration involving anal or rectal mucosa (O70.3)
  • O70.4 Anal sphincter tear complicating delivery, not associated with third degree laceration
    • anal sphincter tear with third degree perineal laceration (O70.2-)
  • O71.0 Rupture of uterus (spontaneous) before onset of labor applies to 3 codes
    • disruption of (current) cesarean delivery wound (O90.0)
    • laceration of uterus, NEC (O71.81)
  • O71.1 Rupture of uterus during labor
    • disruption of cesarean delivery wound (O90.0)
    • laceration of uterus, NEC (O71.81)
  • O71.4 Obstetric high vaginal laceration alone
    • obstetric high vaginal laceration with perineal laceration (O70.-)
  • O72.1 Other immediate postpartum hemorrhage
    • uterine atony NOS (O62.2)
    • uterine atony without hemorrhage (O62.2)
    • postpartum atony of uterus without hemorrhage (O75.89)
  • O73 Retained placenta and membranes, without hemorrhage applies to 2 codes
  • O76 Abnormality in fetal heart rate and rhythm complicating labor and delivery
    • fetal stress NOS (O77.9)
    • labor and delivery complicated by electrocardiographic evidence of fetal stress (O77.8)
    • labor and delivery complicated by ultrasonic evidence of fetal stress (O77.8)
  • O77.8 Labor and delivery complicated by other evidence of fetal stress
    • abnormality of fetal acid-base balance (O68)
    • abnormality in fetal heart rate or rhythm (O76)
    • fetal metabolic acidemia (O68)
  • O77.9 Labor and delivery complicated by fetal stress, unspecified
    • abnormality of fetal acid-base balance (O68)
    • abnormality in fetal heart rate or rhythm (O76)
    • fetal metabolic acidemia (O68)
  • O85 Puerperal sepsis
    • fever of unknown origin following delivery (O86.4)
    • obstetric pyemic and septic embolism (O88.3-)
    • puerperal septic thrombophlebitis (O86.81)
  • O86.0 Infection of obstetric surgical wound applies to 6 codes
    • complications of procedures, not elsewhere classified (T81.4-)
    • postprocedural fever NOS (R50.82)
    • postprocedural retroperitoneal abscess (K68.11)
  • O88 Obstetric embolism applies to 30 codes
    • embolism complicating abortion NOS (O03.2)
    • embolism complicating ectopic or molar pregnancy (O08.2)
    • embolism complicating failed attempted abortion (O07.2)
    • embolism complicating induced abortion (O04.7)
    • embolism complicating spontaneous abortion (O03.2, O03.7)
  • O90.0 Disruption of cesarean delivery wound
    • rupture of uterus (spontaneous) before onset of labor (O71.0-)
    • rupture of uterus during labor (O71.1)
  • O90.3 Peripartum cardiomyopathy
    • pre-existing heart disease complicating pregnancy and the puerperium (O99.4-)
  • O90.4 Postpartum acute kidney failure applies to 2 codes
    • anuria and oliguria (R34)
  • O90.6 Postpartum mood disturbance
    • postpartum depression (F53.0)
    • puerperal psychosis (F53.1)
  • O90.81 Anemia of the puerperium
    • pre-existing anemia complicating the puerperium (O99.03)
  • O92.3 Agalactia
    • Elective agalactia (O92.5)
    • Secondary agalactia (O92.5)
    • Therapeutic agalactia (O92.5)
  • O92.5 Suppressed lactation
    • primary agalactia (O92.3)
  • O98.5 Other viral diseases complicating pregnancy, childbirth and the puerperium applies to 6 codes
    • human immunodeficiency virus [HIV] disease complicating pregnancy, childbirth and the puerperium (O98.7-)
  • O99.0 Anemia complicating pregnancy, childbirth and the puerperium applies to 6 codes
    • anemia arising in the puerperium (O90.81)
    • postpartum anemia NOS (O90.81)
  • O99.03 Anemia complicating the puerperium
    • postpartum anemia not pre-existing prior to delivery (O90.81)
  • O99.1 Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, childbirth and the puerperium applies to 6 codes
  • O99.4 Diseases of the circulatory system complicating pregnancy, childbirth and the puerperium applies to 6 codes
    • peripartum cardiomyopathy (O90.3)
  • O99.81 Abnormal glucose complicating pregnancy, childbirth and the puerperium applies to 3 codes
  • O99.82 Streptococcus B carrier state complicating pregnancy, childbirth and the puerperium applies to 3 codes
    • Carrier of streptococcus group B (GBS) in a nonpregnant woman (Z22.330)

The first view lists notes printed in this chapter (a note on a category or block applies to every code beneath it). The second lists codes of this chapter named by Excludes1 Notes anywhere in the Tabular List, including notes in other chapters.

Questions About Excludes1 Notes

What does an Excludes1 note mean?

An Excludes1 note means “NOT CODED HERE!”: the excluded code should never be used at the same time as the code above the note. It is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition (Section I.A.12.a). The FY 2027 Tabular List has 5,411 of them; 5,284 name other codes, with 5,710 references to 3,528 distinct codes, categories and ranges.

Is there any exception to an Excludes1 note?

Yes: when the two conditions are unrelated to each other. The Guidelines’ example is F45.8, whose Excludes1 note names sleep related teeth grinding (G47.63). A patient with psychogenic dysmenorrhea (an inclusion term of F45.8) and teeth grinding may have both codes reported. If it is not clear whether the conditions are related, query the provider.

Related References

Source: FY 2027 ICD-10-CM Tabular List (CMS and NCHS) and the ICD-10-CM Official Guidelines for Coding and Reporting FY 2027, Section I.A. ICD List is not affiliated with CMS or NCHS.