ICD-10-CM Excludes2 Notes · Chapter 15 · FY 2027 O00-O9A

Excludes2 Notes in Chapter 15: Pregnancy, childbirth and the puerperium ICD-10-CM

An Excludes2 note means "NOT INCLUDED HERE": the excluded condition is not part of this code, but a patient may have both, so both codes may be reported. In Chapter 15 (O00-O9A), notes printed in the chapter name other codes 99 times, and Excludes2 Notes anywhere in the Tabular List name the chapter’s codes 147 times, covering 93 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
99
References in Its Notes
147
References to Its Codes
93
Chapter Codes Named
O00-O9A
Chapter 15
Chapter 15

Excludes2 Notes by the code that carries the note

43 of 43 shown
  • Chapter note Chapter 15 (O00-O9A) Pregnancy, childbirth and the puerperium applies to 2,481 codes
    • mental and behavioral disorders associated with the puerperium (F53.-)
    • obstetrical tetanus (A34)
    • postpartum necrosis of pituitary gland (E23.0)
    • puerperal osteomalacia (M83.0)
  • O04 Complications following (induced) termination of pregnancy applies to 13 codes
    • encounter for elective termination of pregnancy (Z33.2)
    • failed attempted termination of pregnancy (O07.-)
  • O09.2 Supervision of pregnancy with other poor reproductive or obstetric history applies to 8 codes
    • pregnancy care for patient with history of recurrent pregnancy loss (O26.2-)
  • O09.81 Supervision of pregnancy resulting from assisted reproductive technology applies to 4 codes
    • gestational carrier status (Z33.3)
  • O10 Pre-existing hypertension complicating pregnancy, childbirth and the puerperium applies to 36 codes
    • pre-existing hypertension with superimposed pre-eclampsia complicating pregnancy, childbirth and the puerperium (O11.-)
  • Block note Block O20-O29 Other maternal disorders predominantly related to pregnancy applies to 260 codes
    • maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48)
    • maternal diseases classifiable elsewhere but complicating pregnancy, labor and delivery, and the puerperium (O98-O99)
  • O22 Venous complications and hemorrhoids in pregnancy applies to 32 codes
    • obstetric pulmonary embolism (O88.-)
    • venous complications and hemorrhoids of childbirth and the puerperium (O87.-)
  • O23 Infections of genitourinary tract in pregnancy applies to 36 codes
    • gonococcal infections complicating pregnancy, childbirth and the puerperium (O98.2)
    • infections with a predominantly sexual mode of transmission NOS complicating pregnancy, childbirth and the puerperium (O98.3)
    • syphilis complicating pregnancy, childbirth and the puerperium (O98.1)
    • tuberculosis of genitourinary system complicating pregnancy, childbirth and the puerperium (O98.0)
    • venereal disease NOS complicating pregnancy, childbirth and the puerperium (O98.3)
  • O26.0 Excessive weight gain in pregnancy applies to 4 codes
  • O26.6 Liver and biliary tract disorders in pregnancy, childbirth and the puerperium applies to 10 codes
    • hepatorenal syndrome following labor and delivery (O90.41)
  • O29 Complications of anesthesia during pregnancy applies to 56 codes
    • complications of anesthesia during labor and delivery (O74.-)
    • complications of anesthesia during the puerperium (O89.-)
  • O31 Complications specific to multiple gestation applies to 168 codes
    • delayed delivery of second twin, triplet, etc. (O63.2)
    • malpresentation of one fetus or more (O32.9)
    • placental transfusion syndromes (O43.0-)
  • O34.1 Maternal care for benign tumor of corpus uteri applies to 4 codes
    • maternal care for benign tumor of cervix (O34.4-)
    • maternal care for malignant neoplasm of uterus (O9A.1-)
  • O34.6 Maternal care for abnormality of vagina applies to 4 codes
    • maternal care for vaginal varices in pregnancy (O22.1-)
  • O34.7 Maternal care for abnormality of vulva and perineum applies to 4 codes
    • maternal care for perineal and vulval varices in pregnancy (O22.1-)
  • O35.0 Maternal care for (suspected) central nervous system malformation in fetus applies to 70 codes
    • chromosomal abnormality in fetus (O35.1-)
  • O35.2 Maternal care for (suspected) hereditary disease in fetus applies to 7 codes
    • chromosomal abnormality in fetus (O35.1-)
  • O35.F Maternal care for other (suspected) fetal abnormality and damage, fetal musculoskeletal anomalies of trunk applies to 7 codes
    • maternal care for other (suspected) fetal abnormality and damage, fetal lower extremities anomalies (O35.H)
    • maternal care for other (suspected) fetal abnormality and damage, fetal upper extremities anomalies (O35.G)
  • O36 Maternal care for other fetal problems applies to 399 codes
    • labor and delivery complicated by fetal stress (O77.-)
  • O43 Placental disorders applies to 48 codes
    • maternal care for poor fetal growth due to placental insufficiency (O36.5-)
    • placenta previa (O44.-)
    • placental polyp (O90.89)
    • placentitis (O41.14-)
    • premature separation of placenta [abruptio placentae] (O45.-)
  • O67 Labor and delivery complicated by intrapartum hemorrhage, not elsewhere classified applies to 3 codes
    • postpartum hemorrhage (O72.-)
  • O68 Labor and delivery complicated by abnormality of fetal acid-base balance
    • abnormality in fetal heart rate or rhythm (O76)
    • labor and delivery complicated by meconium in amniotic fluid (O77.0)
  • O71.5 Other obstetric injury to pelvic organs
    • obstetric periurethral trauma (O71.82)
  • O75 Other complications of labor and delivery, not elsewhere classified applies to 10 codes
    • puerperal (postpartum) infection (O86.-)
    • puerperal (postpartum) sepsis (O85)
  • O75.4 Other complications of obstetric surgery and procedures
    • complications of anesthesia during labor and delivery (O74.-)
    • disruption of obstetrical (surgical) wound (O90.0-O90.1)
    • hematoma of obstetrical (surgical) wound (O90.2)
    • infection of obstetrical (surgical) wound (O86.0-)
  • O76 Abnormality in fetal heart rate and rhythm complicating labor and delivery
  • Block note Block O85-O92 Complications predominantly related to the puerperium applies to 114 codes
    • mental and behavioral disorders associated with the puerperium (F53.-)
    • obstetrical tetanus (A34)
    • puerperal osteomalacia (M83.0)
  • O85 Puerperal sepsis
    • genital tract infection following delivery (O86.1-)
    • sepsis during labor (O75.3)
    • urinary tract infection following delivery (O86.2-)
  • O86 Other puerperal infections applies to 17 codes
    • infection during labor (O75.3)
    • obstetrical tetanus (A34)
  • O86.4 Pyrexia of unknown origin following delivery
    • pyrexia during labor (O75.2)
  • O87 Venous complications and hemorrhoids in the puerperium applies to 7 codes
    • obstetric embolism (O88.-)
    • puerperal septic thrombophlebitis (O86.81)
    • venous complications in pregnancy (O22.-)
  • O98 Maternal infectious and parasitic diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium applies to 60 codes
    • herpes gestationis (O26.4-)
    • infectious carrier state (O99.82-, O99.83-)
    • obstetrical tetanus (A34)
    • puerperal infection (O86.-)
    • puerperal sepsis (O85)
    • when the reason for maternal care is that the disease is known or suspected to have affected the fetus (O35-O36)
  • O99 Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium applies to 96 codes
    • when the reason for maternal care is that the condition is known or suspected to have affected the fetus (O35-O36)
  • O99.2 Endocrine, nutritional and metabolic diseases complicating pregnancy, childbirth and the puerperium applies to 12 codes
    • diabetes mellitus (O24.-)
    • malnutrition (O25.-)
    • postpartum thyroiditis (O90.5)
  • O99.34 Other mental disorders complicating pregnancy, childbirth, and the puerperium applies to 6 codes
    • postpartum mood disturbance (O90.6)
    • postnatal psychosis (F53.1)
    • puerperal psychosis (F53.1)
  • O99.35 Diseases of the nervous system complicating pregnancy, childbirth, and the puerperium applies to 6 codes
    • pregnancy related peripheral neuritis (O26.8-)
  • O99.4 Diseases of the circulatory system complicating pregnancy, childbirth and the puerperium applies to 6 codes
    • hypertensive disorders (O10-O16)
    • obstetric embolism (O88.-)
    • venous complications and cerebrovenous sinus thrombosis in labor, childbirth and the puerperium (O87.-)
    • venous complications and cerebrovenous sinus thrombosis in pregnancy (O22.-)
  • O99.6 Diseases of the digestive system complicating pregnancy, childbirth and the puerperium applies to 6 codes
    • hemorrhoids in pregnancy (O22.4-)
    • liver and biliary tract disorders in pregnancy, childbirth and the puerperium (O26.6-)
  • O99.7 Diseases of the skin and subcutaneous tissue complicating pregnancy, childbirth and the puerperium applies to 6 codes
    • herpes gestationis (O26.4)
    • pruritic urticarial papules and plaques of pregnancy (PUPPP) (O26.86)
  • O99.8 Other specified diseases and conditions complicating pregnancy, childbirth and the puerperium applies to 18 codes
    • genitourinary infections in pregnancy (O23.-)
    • infection of genitourinary tract following delivery (O86.1-O86.4)
    • malignant neoplasm complicating pregnancy, childbirth and the puerperium (O9A.1-)
    • maternal care for known or suspected abnormality of maternal pelvic organs (O34.-)
    • postpartum acute kidney failure (O90.49)
    • traumatic injuries in pregnancy (O9A.2-)
  • O9A.1 Malignant neoplasm complicating pregnancy, childbirth and the puerperium applies to 6 codes
    • maternal care for benign tumor of corpus uteri (O34.1-)
    • maternal care for benign tumor of cervix (O34.4-)
  • O9A.2 Injury, poisoning and certain other consequences of external causes complicating pregnancy, childbirth and the puerperium applies to 6 codes
    • physical, sexual and psychological abuse complicating pregnancy, childbirth and the puerperium (O9A.3-, O9A.4-, O9A.5-)
  • O9A.3 Physical abuse complicating pregnancy, childbirth and the puerperium applies to 6 codes
    • sexual abuse complicating pregnancy, childbirth and the puerperium (O9A.4)

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 Excludes2 Notes anywhere in the Tabular List, including notes in other chapters.

Questions About Excludes2 Notes

What does an Excludes2 note mean?

An Excludes2 note means “Not included here”: the excluded condition is not part of the condition represented by the code, but a patient may have both conditions at the same time (Section I.A.12.b). The FY 2027 Tabular List has 2,529 of them; 2,493 name other codes, with 2,799 references to 1,779 distinct codes, categories and ranges.

Can both codes be reported when there is an Excludes2 note?

Yes. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate: that is, when the patient has both conditions and both are documented.

Related References

ICD-10-CM Official GuidelinesICD-10-CM Code LookupICD-10-CM Codes ListCode Lists by Tag

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.