O33.5XX9 — Maternal care for disproportion due to unusually large fetus, other fetus
Is O33.5XX9 billable?
Yes — O33.5XX9 is billable for FY2027. O33.5XX9 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. O33.5XX9 may be submitted for encounters from October 1, 2026 through September 30, 2027.
O33.5XX9 at a glance
| Code | O33.5XX9 |
|---|---|
| Description | Maternal care for disproportion due to unusually large fetus, other fetus |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "9" | other fetus |
What does the 7th character "9" mean in O33.5XX9?
In O33.5XX9, the 7th character 9 means other fetus. The 7th character is required for O33.5XX9 to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does O33.5XX9 group to?
O33.5XX9 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 O33.5XX9 listed in the Alphabetic Index?
The Alphabetic Index lists these routes under O33.5, the nearest indexed parent of O33.5XX9. Use them to find the family, then select the specific code.
- Delivery › cesarean › increased size, fetus (childbirth) (labor)
- Delivery › cesarean › oversize fetus (childbirth) (labor)
- Pregnancy › complicated by › oversize fetus (single) (uterine)
Inclusion terms
Alternative wording in documentation that is classified to O33.5XX9.
- Maternal care for disproportion due to disproportion of fetal origin with normally formed fetus
- Maternal care for disproportion due to fetal disproportion NOS
Excludes1 — never code together — inherited from Chapter 15
The conditions below can never be reported together with O33.5XX9 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 O33
The conditions below can never be reported together with O33.5XX9 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- disproportion with obstructed labor (O65-O66)
Use additional code — inherited from Chapter 15
Report an additional code alongside O33.5XX9 to fully describe the condition. O33.5XX9 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 O33.5XX9, but a patient may have both at the same time. When documentation supports it, O33.5XX9 and the excluded code may both be reported.
How long has O33.5XX9 existed?
O33.5XX9 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.