O36.0994
Maternal care for other rhesus isoimmunization, unspecified trimester, fetus 4
Billable FY2026 2025-10-01 → 2026-09-30
This is the unspecified option. 6 more
specific codes sit alongside it. Worth
checking whether the documentation supports one of them.
Exclusions 8 never code together
7th character 7
0 not applicable or unspecified
1 fetus 1
2 fetus 2
3 fetus 3
4 fetus 4 this code
5 fetus 5
9 other fetus
Instructional notes 9
O36code
Includes
- the listed conditions in the fetus as a reason for hospitalization or other obstetric care of the mother, or for termination of pregnancy
O36.0code
Inclusion terms
- Maternal care for Rh incompatibility (with hydrops fetalis)
O00-O9Achapter
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
Use additional code
- code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.Z3A
Index entries leading here 5
Alongside this code 6 same parent — O36.099
O36.0990 Maternal care for oth rhesus isoimmun, unsp trimester, unsp O36.0991 Maternal care for oth rhesus isoimmun, unsp tri, fetus 1 O36.0992 Maternal care for oth rhesus isoimmun, unsp tri, fetus 2 O36.0993 Maternal care for oth rhesus isoimmun, unsp tri, fetus 3 O36.0995 Maternal care for oth rhesus isoimmun, unsp tri, fetus 5 O36.0999 Maternal care for oth rhesus isoimmun, unsp trimester, oth
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.