FY2027 ICD-10-CM reference
O03: Spontaneous abortion
By the HCC Buddy Coding Team
The official ICD-10-CM descriptor is Spontaneous abortion. 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.
CMS-HCC V28
Not applicable to this nonbillable heading
CMS-HCC V24
Not applicable to this nonbillable heading
ESRD
Not applicable to this nonbillable heading
PACE
Not applicable to this nonbillable heading
RxHCC
Not applicable to this nonbillable heading
HHS-HCC
Not applicable to this nonbillable heading
More specific FY2027 codes
- O03.0: Genital tract and pelvic infection following incomplete spontaneous abortionBillable code
- O03.1: Delayed or excessive hemorrhage following incomplete spontaneous abortionBillable code
- O03.2: Embolism following incomplete spontaneous abortionBillable code
- O03.3: Other and unspecified complications following incomplete spontaneous abortionNonbillable heading
- O03.4: Incomplete spontaneous abortion without complicationBillable code
- O03.5: Genital tract and pelvic infection following complete or unspecified spontaneous abortionBillable code
- O03.6: Delayed or excessive hemorrhage following complete or unspecified spontaneous abortionBillable code
- O03.7: Embolism following complete or unspecified spontaneous abortionBillable code
- O03.8: Other and unspecified complications following complete or unspecified spontaneous abortionNonbillable heading
- O03.9: Complete or unspecified spontaneous abortion without complicationBillable code
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).
Excludes1
continuing pregnancy in multiple gestation after abortion of one fetus or more (O31.1-, O31.3-)
Source: O00-O08 (section, inherited).
Instructional note
Incomplete abortion includes retained products of conception following spontaneous abortion
Source: O03 (category, direct).
Includes
miscarriage
Source: O03 (category, direct).
Compare the FY2027 additions, removals and billable-status changes
What does O03 mean in FY2027?
The official ICD-10-CM descriptor is Spontaneous abortion. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Is O03 billable in FY2027?
The FY2027 order file marks O03 as a nonbillable heading. Select a complete billable child code.
Does O03 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. Payment model: CMS CY 2027 Rate Announcement. Read the FY2027 Official Guidelines.
Review the FY2026 April edition