O36.199 — Maternal care for other isoimmunization, unspecified trimester
Is O36.199 billable?
No — O36.199 is a non-billable header code. O36.199 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 O36.199.
Billable codes under this header
- O36.1990Maternal care for other isoimmunization, unspecified trimester, not applicable or unspecified
- O36.1991Maternal care for other isoimmunization, unspecified trimester, fetus 1
- O36.1992Maternal care for other isoimmunization, unspecified trimester, fetus 2
- O36.1993Maternal care for other isoimmunization, unspecified trimester, fetus 3
- O36.1994Maternal care for other isoimmunization, unspecified trimester, fetus 4
- O36.1995Maternal care for other isoimmunization, unspecified trimester, fetus 5
- O36.1999Maternal care for other isoimmunization, unspecified trimester, other fetus
O36.199 at a glance
| Code | O36.199 |
|---|---|
| Description | Maternal care for other isoimmunization, unspecified trimester |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
How is O36.199 listed in the Alphabetic Index?
The Alphabetic Index lists these routes under O36.19, the nearest indexed parent of O36.199. 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 O36.199 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 O36.199 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 O36.199 to fully describe the condition. O36.199 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 O36.199, but a patient may have both at the same time. When documentation supports it, O36.199 and the excluded code may both be reported.
Excludes2 — not included here — inherited from O36
The conditions below are not part of O36.199, but a patient may have both at the same time. When documentation supports it, O36.199 and the excluded code may both be reported.
- labor and delivery complicated by fetal stress (O77.-)
What codes fall under O36.199? (7)
- O36.1990Maternal care for other isoimmunization, unspecified trimester, not applicable or unspecified
- O36.1991Maternal care for other isoimmunization, unspecified trimester, fetus 1
- O36.1992Maternal care for other isoimmunization, unspecified trimester, fetus 2
- O36.1993Maternal care for other isoimmunization, unspecified trimester, fetus 3
- O36.1994Maternal care for other isoimmunization, unspecified trimester, fetus 4
- O36.1995Maternal care for other isoimmunization, unspecified trimester, fetus 5
- O36.1999Maternal care for other isoimmunization, unspecified trimester, other fetus
How long has O36.199 existed?
O36.199 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.