O36.591 — Maternal care for other known or suspected poor fetal growth, first trimester
Is O36.591 billable?
No — O36.591 is a non-billable header code. O36.591 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 O36.591.
Billable codes under this header
- O36.5910Maternal care for other known or suspected poor fetal growth, first trimester, not applicable or unspecified
- O36.5911Maternal care for other known or suspected poor fetal growth, first trimester, fetus 1
- O36.5912Maternal care for other known or suspected poor fetal growth, first trimester, fetus 2
- O36.5913Maternal care for other known or suspected poor fetal growth, first trimester, fetus 3
- O36.5914Maternal care for other known or suspected poor fetal growth, first trimester, fetus 4
- O36.5915Maternal care for other known or suspected poor fetal growth, first trimester, fetus 5
- O36.5919Maternal care for other known or suspected poor fetal growth, first trimester, other fetus
O36.591 at a glance
| Code | O36.591 |
|---|---|
| Description | Maternal care for other known or suspected poor fetal growth, first trimester |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
How is O36.591 listed in the Alphabetic Index?
The Alphabetic Index lists these routes under O36.59, the nearest indexed parent of O36.591. Use them to find the family, then select the specific code.
- Light-for-dates › affecting management of pregnancy (infant)
- Restriction › growth › fetal
- Pregnancy › complicated by › fetal › growth retardation (single) (uterine)
- Pregnancy › complicated by › fetal › poor growth (single) (uterine)
- Pregnancy › complicated by › fetal › growth retardation › light for dates (single) (uterine)
- Pregnancy › complicated by › fetal › growth retardation › small for dates (single) (uterine)
- Pregnancy › complicated by › fetal › poor growth › light for dates (single) (uterine)
- Pregnancy › complicated by › fetal › poor growth › small for dates (single) (uterine)
Excludes1 — never code together — inherited from Chapter 15
The conditions below can never be reported together with O36.591 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 O36.591 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 O36.591 to fully describe the condition. O36.591 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 O36.591, but a patient may have both at the same time. When documentation supports it, O36.591 and the excluded code may both be reported.
Excludes2 — not included here — inherited from O36
The conditions below are not part of O36.591, but a patient may have both at the same time. When documentation supports it, O36.591 and the excluded code may both be reported.
- labor and delivery complicated by fetal stress (O77.-)
What codes fall under O36.591? (7)
- O36.5910Maternal care for other known or suspected poor fetal growth, first trimester, not applicable or unspecified
- O36.5911Maternal care for other known or suspected poor fetal growth, first trimester, fetus 1
- O36.5912Maternal care for other known or suspected poor fetal growth, first trimester, fetus 2
- O36.5913Maternal care for other known or suspected poor fetal growth, first trimester, fetus 3
- O36.5914Maternal care for other known or suspected poor fetal growth, first trimester, fetus 4
- O36.5915Maternal care for other known or suspected poor fetal growth, first trimester, fetus 5
- O36.5919Maternal care for other known or suspected poor fetal growth, first trimester, other fetus
How long has O36.591 existed?
O36.591 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.