FY2027 ICD-10-CM reference
O43: Placental disorders
By the HCC Buddy Coding Team
The official ICD-10-CM descriptor is Placental disorders. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Nonbillable heading. Verified against the official FY2027 order file.
More specific FY2027 codes
- O43.0: Placental transfusion syndromesNonbillable heading
- O43.1: Malformation of placentaNonbillable heading
- O43.2: Morbidly adherent placentaNonbillable heading
- O43.8: Other placental disordersNonbillable heading
- O43.9: Unspecified placental disorderNonbillable heading
FY2027 Tabular instructions
Instructions below include applicable chapter, section and parent-code notes. Each note identifies where it appears in the official source.
Instructional note
CODES FROM THIS CHAPTER ARE FOR USE ONLY ON MATERNAL RECORDS, NEVER ON NEWBORN RECORDS
Source: O00-O9A (chapter, inherited).
Instructional note
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)
Source: O00-O9A (chapter, inherited).
Instructional note
Trimesters are counted from the first day of the last menstrual period. They are defined as follows:
Source: O00-O9A (chapter, inherited).
Instructional note
1st trimester- less than 14 weeks 0 days
Source: O00-O9A (chapter, inherited).
Instructional note
2nd trimester- 14 weeks 0 days to less than 28 weeks 0 days
Source: O00-O9A (chapter, inherited).
Instructional note
3rd trimester- 28 weeks 0 days until delivery
Source: O00-O9A (chapter, inherited).
Instructional note
code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.
Source: O00-O9A (chapter, inherited).
Excludes1
supervision of normal pregnancy (Z34.-)
Source: O00-O9A (chapter, inherited).
Excludes2
mental and behavioral disorders associated with the puerperium (F53.-)
Source: O00-O9A (chapter, inherited).
Excludes2
obstetrical tetanus (A34)
Source: O00-O9A (chapter, inherited).
Excludes2
postpartum necrosis of pituitary gland (E23.0)
Source: O00-O9A (chapter, inherited).
Excludes2
puerperal osteomalacia (M83.0)
Source: O00-O9A (chapter, inherited).
Excludes2
maternal care for poor fetal growth due to placental insufficiency (O36.5-)
Source: O43 (category, direct).
Excludes2
placenta previa (O44.-)
Source: O43 (category, direct).
Excludes2
placental polyp (O90.89)
Source: O43 (category, direct).
Excludes2
placentitis (O41.14-)
Source: O43 (category, direct).
Excludes2
premature separation of placenta [abruptio placentae] (O45.-)
Source: O43 (category, direct).
Compare the FY2027 additions, removals and billable-status changes
What does O43 mean in FY2027?
The official ICD-10-CM descriptor is Placental disorders. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Is O43 billable in FY2027?
The FY2027 order file marks O43 as a nonbillable heading. Select a complete billable child code.
Does O43 map to an HCC?
Risk-model mapping is not applicable to this nonbillable heading. Check a complete billable child code.
Source: CMS FY2027 ICD-10-CM order file. Read the FY2027 Official Guidelines.
Review the FY2026 April edition