O36.821 — Fetal anemia and thrombocytopenia, first trimester
Is O36.821 billable?
No — O36.821 is a non-billable header code. O36.821 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 O36.821.
Billable codes under this header
- O36.8210Fetal anemia and thrombocytopenia, first trimester, not applicable or unspecified
- O36.8211Fetal anemia and thrombocytopenia, first trimester, fetus 1
- O36.8212Fetal anemia and thrombocytopenia, first trimester, fetus 2
- O36.8213Fetal anemia and thrombocytopenia, first trimester, fetus 3
- O36.8214Fetal anemia and thrombocytopenia, first trimester, fetus 4
- O36.8215Fetal anemia and thrombocytopenia, first trimester, fetus 5
- O36.8219Fetal anemia and thrombocytopenia, first trimester, other fetus
O36.821 at a glance
| Code | O36.821 |
|---|---|
| Description | Fetal anemia and thrombocytopenia, first trimester |
| Billable | No — header code |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
How is O36.821 listed in the Alphabetic Index?
The Alphabetic Index lists these routes under O36.82, the nearest indexed parent of O36.821. Use them to find the family, then select the specific code.
- Pregnancy › complicated by › fetal › anemia and thrombocytopenia (single) (uterine)
- Pregnancy › complicated by › fetal › thrombocytopenia (single) (uterine)
Excludes1 — never code together — inherited from Chapter 15
The conditions below can never be reported together with O36.821 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 O36.821 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 O36.821 to fully describe the condition. O36.821 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 O36.821, but a patient may have both at the same time. When documentation supports it, O36.821 and the excluded code may both be reported.
Excludes2 — not included here — inherited from O36
The conditions below are not part of O36.821, but a patient may have both at the same time. When documentation supports it, O36.821 and the excluded code may both be reported.
- labor and delivery complicated by fetal stress (O77.-)
What codes fall under O36.821? (7)
- O36.8210Fetal anemia and thrombocytopenia, first trimester, not applicable or unspecified
- O36.8211Fetal anemia and thrombocytopenia, first trimester, fetus 1
- O36.8212Fetal anemia and thrombocytopenia, first trimester, fetus 2
- O36.8213Fetal anemia and thrombocytopenia, first trimester, fetus 3
- O36.8214Fetal anemia and thrombocytopenia, first trimester, fetus 4
- O36.8215Fetal anemia and thrombocytopenia, first trimester, fetus 5
- O36.8219Fetal anemia and thrombocytopenia, first trimester, other fetus
How long has O36.821 existed?
O36.821 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.