O40.2XX1 — Polyhydramnios, second trimester, fetus 1
Is O40.2XX1 billable?
Yes — O40.2XX1 is billable for FY2027. O40.2XX1 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. O40.2XX1 may be submitted for encounters from October 1, 2026 through September 30, 2027.
O40.2XX1 at a glance
| Code | O40.2XX1 |
|---|---|
| Description | Polyhydramnios, second trimester, fetus 1 |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "1" | fetus 1 |
What does the 7th character "1" mean in O40.2XX1?
In O40.2XX1, the 7th character 1 means fetus 1. The 7th character is required for O40.2XX1 to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does O40.2XX1 group to?
O40.2XX1 sits in MDC 14 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 817Other Antepartum Diagnoses with O.R. Procedures with MCCsurgical
- 818Other Antepartum Diagnoses with O.R. Procedures with CCsurgical
- 819Other Antepartum Diagnoses with O.R. Procedures without CC/MCCsurgical
How is O40.2XX1 listed in the Alphabetic Index?
The Alphabetic Index lists these routes under O40, the nearest indexed parent of O40.2XX1. Use them to find the family, then select the specific code.
- Pregnancy › complicated by › polyhydramnios (single) (uterine)
Excludes1 — never code together — inherited from Chapter 15
The conditions below can never be reported together with O40.2XX1 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 O40
The conditions below can never be reported together with O40.2XX1 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- encounter for suspected maternal and fetal conditions ruled out (Z03.7-)
Use additional code — inherited from Chapter 15
Report an additional code alongside O40.2XX1 to fully describe the condition. O40.2XX1 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 O40.2XX1, but a patient may have both at the same time. When documentation supports it, O40.2XX1 and the excluded code may both be reported.
How long has O40.2XX1 existed?
O40.2XX1 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.