MCMCB Pro
O36.8319

O36.8319Maternal care for abnormalities of the fetal heart rate or rhythm, first trimester, other fetus

Billable / specific codeICD-10-CM

O36.8319 is a billable, specific ICD-10-CM code for maternal care for abnormalities of the fetal heart rate or rhythm, first trimester, other fetus. It is valid for submission on a claim.

7th character "9" — other fetus

One of the following 7th characters is to be assigned to each code under category O36. 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 O36 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

O36.8319 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.

Related codes at this level

Codes that share O36.831. If O36.8319 is not quite right, the correct code is usually one of these.

Questions about O36.8319

Is O36.8319 a billable ICD-10-CM code?
Yes. O36.8319 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does O36.8319 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).
ICD-10-CMFY2026-Apr· effective April 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.