Is O33.1 a billable ICD-10-CM code?

Yes. O33.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does O33.1 sit in the tabular list?

Pregnancy, childbirth and the puerperium (O00-O9A), in the block Maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48).

What cannot be coded together with O33.1?

O33.1 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above O33.1 (O33) and apply to it just the same.

O33.1

O33.1 — Maternal care for disproportion due to generally contracted pelvis

Billable / specific codeICD-10-CM

O33.1 is a billable, specific ICD-10-CM code for maternal care for disproportion due to generally contracted pelvis. It is valid for submission on a claim.

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Maternal care for disproportion due to contracted pelvis NOS causing disproportion

Excludes1 inherited from the categories above O33.1

These are not written on O33.1, but they bind it: a note on a category applies to every code beneath it. Billing O33.1 with anything listed here is a denial.

Written on O33 — Maternal care for disproportion

disproportion with obstructed labor (O65-O66)

Other codes that can never be billed with O33.1

These codes carry an Excludes1 note pointing at O33.1. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading O33.1 alone.

M95.5Acquired deformity of pelvis

Risk adjustment

O33.1 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

How O33.1 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to O33.1.

Contraction, contracture, contracted›pelvis›with disproportion(fetopelvic)
Infancy, infantile, infantilism›pelvis›with disproportion(fetopelvic)
Pregnancy›complicated by›contracted pelvis(general)
Small›pelvis›with disproportion(fetopelvic)
Pregnancy›complicated by›disproportion›generally contracted pelvis

Code history

O33.1 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share O33. If O33.1 is not quite right, the correct code is usually one of these.

Questions about O33.1

Is O33.1 a billable ICD-10-CM code?: Yes. O33.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does O33.1 sit in the tabular list?: Pregnancy, childbirth and the puerperium (O00-O9A), in the block Maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48).
What cannot be coded together with O33.1?: O33.1 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above O33.1 (O33) and apply to it just the same.