O36.5999
Maternal care for other known or suspected poor fetal growth, unspecified trimester, other fetus
Billable FY2026 2025-10-01 → 2026-09-30
This is the unspecified option. 6 more
specific codes sit alongside it. Worth
checking whether the documentation supports one of them.
Exclusions 8 never code together
7th character 7
0 not applicable or unspecified
1 fetus 1
2 fetus 2
3 fetus 3
4 fetus 4
5 fetus 5
9 other fetus this code
Instructional notes 8
O36code
Includes
- the listed conditions in the fetus as a reason for hospitalization or other obstetric care of the mother, or for termination of pregnancy
O00-O9Achapter
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
Use additional code
- code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.Z3A
Index entries leading here 3
Alongside this code 6 same parent — O36.599
O36.5990 Matern care for oth or susp poor fetl grth, unsp tri, unsp O36.5991 Matern care for oth or susp poor fetl grth, unsp tri, fts1 O36.5992 Matern care for oth or susp poor fetl grth, unsp tri, fts2 O36.5993 Matern care for oth or susp poor fetl grth, unsp tri, fts3 O36.5994 Matern care for oth or susp poor fetl grth, unsp tri, fts4 O36.5995 Matern care for oth or susp poor fetl grth, unsp tri, fts5
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.