O36.191 — Maternal care for other isoimmunization, first trimester
Is O36.191 billable?
No — O36.191 is a non-billable header code. O36.191 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 7 billable codes beneath O36.191.
Billable codes under this header
- O36.1910Maternal care for other isoimmunization, first trimester, not applicable or unspecified
- O36.1911Maternal care for other isoimmunization, first trimester, fetus 1
- O36.1912Maternal care for other isoimmunization, first trimester, fetus 2
- O36.1913Maternal care for other isoimmunization, first trimester, fetus 3
- O36.1914Maternal care for other isoimmunization, first trimester, fetus 4
- O36.1915Maternal care for other isoimmunization, first trimester, fetus 5
- O36.1919Maternal care for other isoimmunization, first trimester, other fetus
O36.191 at a glance
| Code | O36.191 |
|---|---|
| Description | Maternal care for other isoimmunization, first trimester |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
How is O36.191 listed in the Alphabetic Index?
The Alphabetic Index lists these routes under O36.19, the nearest indexed parent of O36.191. Use them to find the family, then select the specific code.
- Isoimmunization NEC › affecting management of pregnancy › anti-B sensitization
- Isoimmunization NEC › affecting management of pregnancy › specified NEC
- Incompatibility › ABO › affecting management of pregnancy › anti-B sensitization
- Incompatibility › ABO › affecting management of pregnancy › specified NEC
- Incompatibility › bloodNEC › affecting management of pregnancy › anti-B sensitization
- Pregnancy › complicated by › isoimmunization › anti-B sensitization (single) (uterine)
- Pregnancy › complicated by › isoimmunization › specified NEC (single) (uterine)
Excludes1 — never code together — inherited from Chapter 15
The conditions below can never be reported together with O36.191 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- supervision of normal pregnancy (Z34.-)
Excludes1 — never code together — inherited from O36
The conditions below can never be reported together with O36.191 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Use additional code — inherited from Chapter 15
Report an additional code alongside O36.191 to fully describe the condition. O36.191 is sequenced first.
- code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.
Excludes2 — not included here — inherited from Chapter 15
The conditions below are not part of O36.191, but a patient may have both at the same time. When documentation supports it, O36.191 and the excluded code may both be reported.
Excludes2 — not included here — inherited from O36
The conditions below are not part of O36.191, but a patient may have both at the same time. When documentation supports it, O36.191 and the excluded code may both be reported.
- labor and delivery complicated by fetal stress (O77.-)
What codes fall under O36.191? (7)
- O36.1910Maternal care for other isoimmunization, first trimester, not applicable or unspecified
- O36.1911Maternal care for other isoimmunization, first trimester, fetus 1
- O36.1912Maternal care for other isoimmunization, first trimester, fetus 2
- O36.1913Maternal care for other isoimmunization, first trimester, fetus 3
- O36.1914Maternal care for other isoimmunization, first trimester, fetus 4
- O36.1915Maternal care for other isoimmunization, first trimester, fetus 5
- O36.1919Maternal care for other isoimmunization, first trimester, other fetus
How long has O36.191 existed?
O36.191 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.