ICDcodes.org
FY2027

O03.9 — Complete or unspecified spontaneous abortion without complication

BillableUnspecified

Is O03.9 billable?

Yes, but O03.9 is an unspecified code. O03.9 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, O03.9 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting O03.9 — the more specific alternatives are listed below.

O03.9 at a glance

CodeO03.9
DescriptionComplete or unspecified spontaneous abortion without complication
BillableYes
Code setICD-10-CM FY2027
Valid for encountersOctober 1, 2026 – September 30, 2027

Which MS-DRGs does O03.9 group to?

O03.9 sits in MDC 14 and helps define the logic of 1 MS-DRG (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.

  • 770Abortion with D&C, Aspiration Curettage or Hysterotomysurgical

How is O03.9 listed in the Alphabetic Index?

These are the routes through the Alphabetic Index that lead to O03.9. They show the wording a clinician may have documented, which often differs from the Tabular description.

  • Abortion (complete) (spontaneous)
  • Miscarriage
  • Threatened › abortion › with subsequent abortion

Inclusion terms

Alternative wording in documentation that is classified to O03.9.

  • Miscarriage NOS
  • Spontaneous abortion NOS

Excludes1 — never code together — inherited from Chapter 15

The conditions below can never be reported together with O03.9 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

  • supervision of normal pregnancy (Z34.-)

Excludes1 — never code together — inherited from O00-O08

The conditions below can never be reported together with O03.9 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

  • continuing pregnancy in multiple gestation after abortion of one fetus or more (O31.1-, O31.3-)

Use additional code — inherited from Chapter 15

Report an additional code alongside O03.9 to fully describe the condition. O03.9 is sequenced first.

  • code, if applicable, from category Z3A, Weeks of gestation, to identify the specific week of the pregnancy, if known.

Excludes2 — not included here — inherited from Chapter 15

The conditions below are not part of O03.9, but a patient may have both at the same time. When documentation supports it, O03.9 and the excluded code may both be reported.

  • mental and behavioral disorders associated with the puerperium (F53.-)
  • obstetrical tetanus (A34)
  • postpartum necrosis of pituitary gland (E23.0)
  • puerperal osteomalacia (M83.0)

How long has O03.9 existed?

O03.9 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.

Which codes are confused with O03.9?

ICD-10-CM declares these codes mutually exclusive with O03.9 — exactly one of each pair can be correct for a given encounter.

Which conditions are coded to O03.9?

What other codes are in the O03 family? (9)