O36.19 – Maternal care for other isoimmunization
ICD-10-CM 2027 diagnosis code · Maternal care related to the fetus and amniotic cavity and possible delivery problems
- Code
O36.19(claims format:O3619)- Description
- Maternal care for other isoimmunization
- Billable
- No – use a more specific code below
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 15. Pregnancy, childbirth and the puerperium (O00-O9A)
- Block
- O30-O48 Maternal care related to the fetus and amniotic cavity and possible delivery problems
- Parent codes
- O36 › O36.1
Billable codes under O36.19
O36.19 is a header code and cannot be used on claims. Choose the most specific code:
- O36.191 – Maternal care for other isoimmunization, first trimesterHeader (more codes below)
- O36.192 – Maternal care for other isoimmunization, second trimesterHeader (more codes below)
- O36.193 – Maternal care for other isoimmunization, third trimesterHeader (more codes below)
- O36.199 – Maternal care for other isoimmunization, unspecified trimesterHeader (more codes below)
7th character values
Codes in this category need a 7th character to describe the encounter or episode of care (use placeholder X for empty positions).
| Character | Meaning |
|---|---|
0 | not applicable or unspecified |
1 | fetus 1 |
2 | fetus 2 |
3 | fetus 3 |
4 | fetus 4 |
5 | fetus 5 |
9 | other fetus |
Notes for O36.19
- Maternal care for Anti-B sensitization
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
O36 – Maternal care for other fetal problems
- 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.-)
- One of the following 7th characters is to be assigned to each code under category O36. 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 O36 that has a 7th character of 1 through 9.
O36.1 – Maternal care for other isoimmunization
- Maternal care for ABO isoimmunization
Index terms for O36.19
Entries in the ICD-10-CM alphabetic index that lead to this code:
- Pregnancy, complicated by, isoimmunization, specified NEC
- Pregnancy, complicated by, isoimmunization, anti-B sensitization
- Isoimmunization NEC, affecting management of pregnancy, specified NEC
- Incompatibility, ABO, affecting management of pregnancy, specified NEC
- Isoimmunization NEC, affecting management of pregnancy, anti-B sensitization
- Incompatibility, ABO, affecting management of pregnancy, anti-B sensitization
- Incompatibility, blood, affecting management of pregnancy, anti-B sensitization
Related codes in O36.1
Frequently asked questions
What is ICD-10 code O36.19?
O36.19 is the ICD-10-CM code for maternal care for other isoimmunization, in the block O30-O48 (Maternal care related to the fetus and amniotic cavity and possible delivery problems).
Is O36.19 a billable code?
No. O36.19 is a header code with more specific child codes; report one of the billable codes listed above.
What category does O36.19 belong to?
It belongs to category O36 – Maternal care for other fetal problems.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.