ICDcodes.org
FY2027

O33.5 — Maternal care for disproportion due to unusually large fetus

Not billable

Is O33.5 billable?

No — O33.5 is a non-billable header code. O33.5 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 O33.5.

O33.5 at a glance

CodeO33.5
DescriptionMaternal care for disproportion due to unusually large fetus
BillableNo — header code
Code setICD-10-CM FY2027
Valid for encountersOctober 1, 2026 – September 30, 2027

How is O33.5 listed in the Alphabetic Index?

These are the routes through the Alphabetic Index that lead to O33.5. They show the wording a clinician may have documented, which often differs from the Tabular description.

  • 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 O33.5.

  • 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 O33.5 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 O33.5 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 O33.5 to fully describe the condition. O33.5 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 O33.5, but a patient may have both at the same time. When documentation supports it, O33.5 and the excluded code may both be reported.

  • mental and behavioral disorders associated with the puerperium (F53.-)
  • obstetrical tetanus (A34)
  • postpartum necrosis of pituitary gland (E23.0)
  • puerperal osteomalacia (M83.0)

What codes fall under O33.5? (7)

How long has O33.5 existed?

O33.5 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.

What other codes are in the O33 family? (9)