O35.1 — Maternal care for (suspected) chromosomal abnormality in fetus
O35.1 is a non-billable header ICD-10-CM code for maternal care for (suspected) chromosomal abnormality in fetus. 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 each code under category O35. 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 a code from category O35 that has 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
Risk adjustment
O35.1 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.
Code to one of these instead O35.1
7 child codes. Green means billable.
- O35.10Maternal care for (suspected) chromosomal abnormality in fetus, unspecified
- O35.11Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 13
- O35.12Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 18
- O35.13Maternal care for (suspected) chromosomal abnormality in fetus, Trisomy 21
- O35.14Maternal care for (suspected) chromosomal abnormality in fetus, Turner Syndrome
- O35.15Maternal care for (suspected) chromosomal abnormality in fetus, sex chromosome abnormality
- O35.19Maternal care for (suspected) chromosomal abnormality in fetus, other chromosomal abnormality
Related codes at this level
Codes that share O35. If O35.1 is not quite right, the correct code is usually one of these.
- O35.0Maternal care for (suspected) central nervous system malformation in fetus
- O35.AMaternal care for other (suspected) fetal abnormality and damage, fetal facial anomalies
- O35.BMaternal care for other (suspected) fetal abnormality and damage, fetal cardiac anomalies
- O35.CMaternal care for other (suspected) fetal abnormality and damage, fetal pulmonary anomalies
- O35.DMaternal care for other (suspected) fetal abnormality and damage, fetal gastrointestinal anomalies
- O35.EMaternal care for other (suspected) fetal abnormality and damage, fetal genitourinary anomalies
- O35.FMaternal care for other (suspected) fetal abnormality and damage, fetal musculoskeletal anomalies of trunk
- O35.GMaternal care for other (suspected) fetal abnormality and damage, fetal upper extremities anomalies
- O35.HMaternal care for other (suspected) fetal abnormality and damage, fetal lower extremities anomalies
- O35.2Maternal care for (suspected) hereditary disease in fetus
- O35.3Maternal care for (suspected) damage to fetus from viral disease in mother
- O35.4Maternal care for (suspected) damage to fetus from alcohol
- O35.5Maternal care for (suspected) damage to fetus by drugs
- O35.6Maternal care for (suspected) damage to fetus by radiation
- O35.7Maternal care for (suspected) damage to fetus by other medical procedures
- O35.8Maternal care for other (suspected) fetal abnormality and damage
- O35.9Maternal care for (suspected) fetal abnormality and damage, unspecified
Questions about O35.1
- Is O35.1 a billable ICD-10-CM code?
- No. O35.1 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
- Where does O35.1 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).