MCMedicalCodingSoftware
O33.7

O33.7: Maternal care for disproportion due to other fetal deformities

Non-billable headerICD-10-CM

O33.7 is a non-billable header ICD-10-CM code for maternal care for disproportion due to other fetal deformities. It cannot be billed on its own: choose one of the more specific child codes below. This code also requires a 7th character before it is complete.

This code requires a 7th character

One of the following 7th characters is to be assigned to code O33.7. 7th character 0 is for single gestations and multiple gestations where the fetus is unspecified. 7th characters 1 through 9 are for cases of multiple gestations to identify the fetus for which the code applies. The appropriate code from category O30, Multiple gestation, must also be assigned when assigning code O33.7 with a 7th character of 1 through 9.

0
not applicable or unspecified
1
fetus 1
2
fetus 2
3
fetus 3
4
fetus 4
5
fetus 5
9
other fetus

Excludes1: never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

  • obstructed labor due to other fetal deformities (O66.3)

Inclusion terms

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

  • Maternal care for disproportion due to fetal ascites
  • Maternal care for disproportion due to fetal hydrops
  • Maternal care for disproportion due to fetal meningomyelocele
  • Maternal care for disproportion due to fetal sacral teratoma
  • Maternal care for disproportion due to fetal tumor

Excludes1 inherited from the categories above O33.7

A category’s note binds every code beneath it.

Written on O33: Maternal care for disproportion

  • disproportion with obstructed labor (O65-O66)

Other codes that can never be billed with O33.7

Their own Excludes1 notes name this code, so the conflict is not listed above.

  • M95.5Acquired deformity of pelvis

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Alphabetic index entries that lead here

  • Deformity›fetal›with fetopelvic disproportion
  • Pregnancy›complicated by›disproportion›fetal deformities NEC(ascites) (hydrops) (meningomyelocele) (sacral teratoma) (tumor)
  • Pregnancy›complicated by›fetal›disproportion due to deformity(fetal)

Code history

Unchanged in every release from FY2024 to FY2027.

Code to one of these instead O33.7

7 child codes. Green means billable.

Other codes under O33

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.