All ICD10 Codes
O35Not billable, use a more specific code below

Maternal care for known or suspected fetal abnormality and damage

In Maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48), chapter 15: Pregnancy, Childbirth and the Puerperium

231 billable codes under O35: none are a CC or MCC; none map to an HCC.

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Instructional notes

Includes: conditions that are coded here

  • the listed conditions in the fetus as a reason for hospitalization or other obstetric care to the mother, or for termination of pregnancy

Excludes1: not coded here, use a different code

  • encounter for suspected maternal and fetal conditions ruled out (Z03.7-)

Code also: add a code for this too, order depends on the encounter

  • any associated maternal condition

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Coding of obstetric cases with O00-O9A codes: sequencing priority, trimester and fetus characters, principal diagnosis selection, delivery outcome, and pregnancy-related complications.

Read Section I.C.15 (page 63), 11 more topics

All codes under O35

O35 can't be used on a claim. Pick a billable code below; grey headings group them.

O35 MS-DRGs

As the principal diagnosis, all 231 billable codes under O35 group to MS-DRG 817, 818, 819, 831, 832, or 833 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

Other codes that refer to O35

Notes on these codes point to O35.

  • O98 Excludes2: when the reason for maternal care is that the disease is known or suspected to have affected the fetus (O35-O36)
  • O99 Excludes2: when the reason for maternal care is that the condition is known or suspected to have affected the fetus (O35-O36)
  • Z03.7 Excludes1: known or suspected fetal anomalies affecting management of mother, not ruled out (O26.-, O35.-, O36.-, O40.-, O41.-)

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

Birth Defects

A birth defect is a problem that happens while a baby is developing in the mother's body. Most birth defects happen during the first 3 months of pregnancy. One out of every 33 babies in the United States is born with a birth defect.

Read more about birth defects on MedlinePlus

Health Problems in Pregnancy

A health problem in pregnancy is any disease or condition that could affect your health or the health of your fetus. Some health problems may make it more likely that you will have a high-risk pregnancy. A high-risk pregnancy is one in which you, your fetus, or both are at higher risk for health problems than in a typical pregnancy.

Read more about health problems in pregnancy on MedlinePlus

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.