ICD-10-CM 2027 diagnosis code
O36Maternal care for other fetal problems
O36 is a header code, so it can't be reported by itself. Choose one of the 9 more specific codes beneath it.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About O36
O36 is the ICD-10-CM diagnosis code for maternal care for other fetal problems. It belongs to block O30-O48 (maternal care related to the fetus and amniotic cavity and possible delivery problems) and chapter 15 (pregnancy, childbirth and the puerperium). It is a header code, so it can't be reported by itself; one of its 9 subcodes must be used instead.
To report this condition, pick the subcode that matches the documentation: O36.0 (isoimmunization), O36.1 (isoimmunization), O36.2 (fetalis), O36.4 (death), O36.5 (growth), O36.6 (growth), O36.7 (pregnancy), O36.8 (problems) and 1 more.
Don't report O36 together with the conditions in its Excludes1 note: encounter for suspected maternal and fetal conditions ruled out (Z03.7-) and placental transfusion syndromes (O43.0-).
The conditions in its Excludes2 note aren't part of O36, but may be coded alongside it if the patient has both: labor and delivery complicated by fetal stress (O77.-).
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Specific codes under O36
- O36.0Maternal care for rhesus isoimmunization
- O36.1Maternal care for other isoimmunization
- O36.2Maternal care for hydrops fetalis
- O36.4Maternal care for intrauterine death
- O36.5Maternal care for known or suspected poor fetal growth
- O36.51Maternal care for known or suspected placental insufficiency
- O36.511Maternal care for known or suspected placental insufficiency, first trimester
- O36.512Maternal care for known or suspected placental insufficiency, second trimester
- O36.513Maternal care for known or suspected placental insufficiency, third trimester
- O36.519Maternal care for known or suspected placental insufficiency, unspecified trimester
- O36.59Maternal care for other known or suspected poor fetal growth
- O36.591Maternal care for other known or suspected poor fetal growth, first trimester
- O36.592Maternal care for other known or suspected poor fetal growth, second trimester
- O36.593Maternal care for other known or suspected poor fetal growth, third trimester
- O36.599Maternal care for other known or suspected poor fetal growth, unspecified trimester
- O36.51Maternal care for known or suspected placental insufficiency
- O36.6Maternal care for excessive fetal growth
- O36.7Maternal care for viable fetus in abdominal pregnancy
- O36.70Maternal care for viable fetus in abdominal pregnancy, unspecified trimester
- O36.71Maternal care for viable fetus in abdominal pregnancy, first trimester
- O36.72Maternal care for viable fetus in abdominal pregnancy, second trimester
- O36.73Maternal care for viable fetus in abdominal pregnancy, third trimester
- O36.8Maternal care for other specified fetal problems
- O36.80Pregnancy with inconclusive fetal viability
- O36.81Decreased fetal movements
- O36.82Fetal anemia and thrombocytopenia
- O36.83Maternal care for abnormalities of the fetal heart rate or rhythm
- O36.831Maternal care for abnormalities of the fetal heart rate or rhythm, first trimester
- O36.832Maternal care for abnormalities of the fetal heart rate or rhythm, second trimester
- O36.833Maternal care for abnormalities of the fetal heart rate or rhythm, third trimester
- O36.839Maternal care for abnormalities of the fetal heart rate or rhythm, unspecified trimester
- O36.89Maternal care for other specified fetal problems
- O36.9Maternal care for fetal problem, unspecified
Coding notes
- the listed conditions in the fetus as a reason for hospitalization or other obstetric care of the mother, or for termination of pregnancy
- labor and delivery complicated by fetal stress (O77.-)
Notes that apply from higher levels
Instructions written at a parent level also apply to O36.
Broader instructions also apply from Chapter 15: Pregnancy, childbirth and the puerperium.
Codes whose notes reference O36
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about O36
Is O36 billable?
- No. O36 is a header code. Report one of its more specific subcodes instead.