O33.7 vs O66.3
O33.7 (Maternal care for disproportion due to other fetal deformities) compared with O66.3 (Obstructed labor due to other abnormalities of fetus), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. O33.7 carries an Excludes1 note covering O66.3: “obstructed labor due to other fetal deformities (O66.3)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
No — do not report together. O33.7 carries an Excludes1 note covering O66.3: “disproportion with obstructed labor (O65-O66)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| O33.7Maternal care for disproportion due to other fetal deformities | O66.3Obstructed labor due to other abnormalities of fetus | |
|---|---|---|
| Billing status | Non-billable header Report instead: O33.7XX0, O33.7XX1, O33.7XX2, O33.7XX3, O33.7XX4 | Billable |
| Classification | O00-O9A — Pregnancy, Childbirth and the Puerperium (O00-O9A) | O00-O9A — Pregnancy, Childbirth and the Puerperium (O00-O9A) |
| Definition | Maternal care for disproportion due to other fetal deformities is a non-billable ICD-10-CM category code (O33.7). | Obstructed labor due to other abnormalities of fetus is a billable ICD-10-CM diagnosis code (O66.3). |
| 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. | — |
| Includes | the listed conditions as a reason for observation, hospitalization or other obstetric care of the mother, or for cesarean delivery before onset of labor Maternal care for disproportion due to fetal ascites Maternal care for disproportion due to fetal hydrops Maternal care for disproportion due to fetal meningomyelocele | Dystocia due to fetal ascites Dystocia due to fetal hydrops Dystocia due to fetal meningomyelocele Dystocia due to fetal sacral teratoma |
| Use additional code | — | code to identify cause of obstruction |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources