Coding and coverage · ICD-10-CM
O35.5 Maternal care for (suspected) damage to fetus by drugs
This code needs a 7th character (use X as a placeholder for missing characters).
Codes under this one
- O35.5XX0 Maternal care for (suspected) damage to fetus by drugs, not applicable or unspecified
- O35.5XX1 Maternal care for (suspected) damage to fetus by drugs, fetus 1
- O35.5XX2 Maternal care for (suspected) damage to fetus by drugs, fetus 2
- O35.5XX3 Maternal care for (suspected) damage to fetus by drugs, fetus 3
- O35.5XX4 Maternal care for (suspected) damage to fetus by drugs, fetus 4
- O35.5XX5 Maternal care for (suspected) damage to fetus by drugs, fetus 5
- O35.5XX9 Maternal care for (suspected) damage to fetus by drugs, other fetus
Instructional notes
Chapter 15
Excludes1Not coded here: never report with this code, except when the two conditions are unrelated.
- supervision of normal pregnancy (Z34.-)
Excludes2Not included here: the patient may have both; report both when both are present.
Use additional codeAdd a second code for the full picture.
- code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.
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
O35
Excludes1Not coded here: never report with this code, except when the two conditions are unrelated.
- encounter for suspected maternal and fetal conditions ruled out (Z03.7-)
Code also
- any associated maternal condition
Includes
- the listed conditions in the fetus as a reason for hospitalization or other obstetric care to the mother, or for termination of pregnancy
7th charactersOne of the following 7th characters is to be assigned to each code under category O35. 7th character 0 is for single gestations and multiple gestations where the fetus is unspecified. 7th characters 1 through 9 are for cases of multiple gestations to identify the fetus for which the code applies. The appropriate code from category O30, Multiple gestation, must also be assigned when assigning a code from category O35 that has a 7th character of 1 through 9.
- 0 not applicable or unspecified
- 1 fetus 1
- 2 fetus 2
- 3 fetus 3
- 4 fetus 4
- 5 fetus 5
- 9 other fetus
This code
Inclusion terms
- Maternal care for damage to fetus from drug addiction
Chapter 15: Pregnancy, childbirth and the puerperium (O00-O9A) · O30-O48 Maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48)
Source: ICD-10-CM FY 2027 code descriptions and tabular list (CMS and CDC National Center for Health Statistics), effective 2026-10-01 through 2027-09-30 · CMS ICD-10 files. HCC mapping: CMS-HCC V28, payment year 2027. As of 2026-11-04.
Coverage and payment depend on the claim details; confirm with the Medicare Administrative Contractor.