Coding and coverage · ICD-10-CM
O36.593 Maternal care for other known or suspected poor fetal growth, third trimester
This code needs a 7th character (use X as a placeholder for missing characters).
7th character codes
- O36.5930 Maternal care for other known or suspected poor fetal growth, third trimester, not applicable or unspecified
- O36.5931 Maternal care for other known or suspected poor fetal growth, third trimester, fetus 1
- O36.5932 Maternal care for other known or suspected poor fetal growth, third trimester, fetus 2
- O36.5933 Maternal care for other known or suspected poor fetal growth, third trimester, fetus 3
- O36.5934 Maternal care for other known or suspected poor fetal growth, third trimester, fetus 4
- O36.5935 Maternal care for other known or suspected poor fetal growth, third trimester, fetus 5
- O36.5939 Maternal care for other known or suspected poor fetal growth, third trimester, other fetus
Instructional notes
Chapter 15
Excludes1Not coded here: never report with this code, except when the two conditions are unrelated.
- supervision of normal pregnancy (Z34.-)
Excludes2Not included here: the patient may have both; report both when both are present.
Use additional codeAdd a second code for the full picture.
- code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.
Notes
- CODES FROM THIS CHAPTER ARE FOR USE ONLY ON MATERNAL RECORDS, NEVER ON NEWBORN RECORDS
- Codes from this chapter are for use for conditions related to or aggravated by the pregnancy, childbirth, or by the puerperium (maternal causes or obstetric causes)
- Trimesters are counted from the first day of the last menstrual period. They are defined as follows:
- 1st trimester- less than 14 weeks 0 days
- 2nd trimester- 14 weeks 0 days to less than 28 weeks 0 days
- 3rd trimester- 28 weeks 0 days until delivery
O36
Excludes1Not coded here: never report with this code, except when the two conditions are unrelated.
Excludes2Not included here: the patient may have both; report both when both are present.
- labor and delivery complicated by fetal stress (O77.-)
Includes
- the listed conditions in the fetus as a reason for hospitalization or other obstetric care of the mother, or for termination of pregnancy
7th charactersOne 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
O36.59
Inclusion terms
- Maternal care for known or suspected light-for-dates NOS
- Maternal care for known or suspected small-for-dates NOS
Chapter 15: Pregnancy, childbirth and the puerperium (O00-O9A) · O30-O48 Maternal care related to the fetus and amniotic cavity and possible delivery problems (O30-O48)
Source: ICD-10-CM FY 2027 code descriptions and tabular list (CMS and CDC National Center for Health Statistics), effective 2026-10-01 through 2027-09-30 · CMS ICD-10 files. HCC mapping: CMS-HCC V28, payment year 2027. As of 2026-11-04.
Coverage and payment depend on the claim details; confirm with the Medicare Administrative Contractor.