O33
ICD-10Non-billable categoryMaternal care for disproportion
Official ICD-10-CM descriptor (FY2026)
Maternal care for disproportion
O33 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.
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
Excludes1
Not coded here. An Excludes1 code should never be reported at the same time as the code above it.
- disproportion with obstructed labor (O65-O66)
More specific codes under O33
- O33.0Matern care for disproprtn d/t deformity of matern pelv bone
- O33.1Matern care for disproprtn d/t generally contracted pelvis
- O33.2Maternal care for disproprtn due to inlet contrctn of pelvis
- O33.3Matern care for disproprtn due to outlet contrctn of pelviscategory
- O33.4Matern care for disproprtn of mixed matern and fetal origincategory
- O33.5Maternal care for disproportion due to unusually large fetuscategory
- O33.6Maternal care for disproportion due to hydrocephalic fetuscategory
- O33.7Maternal care for disproportion due to oth fetal deformitiescategory
- O33.8Maternal care for disproportion of other origin
- O33.9Maternal care for disproportion, unspecified
Where this code sits
Krasyn Codes for Chrome
Review coding suggestions beside a validated web workflow. Private pilot.
Request pilot accessSource
ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.