ICDcodes.org
FY2027

O99.4 — Diseases of the circulatory system complicating pregnancy, childbirth and the puerperium

Not billable

Is O99.4 billable?

No — O99.4 is a non-billable header code. O99.4 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 6 billable codes beneath O99.4.

O99.4 at a glance

CodeO99.4
DescriptionDiseases of the circulatory system complicating pregnancy, childbirth and the puerperium
BillableNo — header code
Code setICD-10-CM FY2027
Valid for encountersOctober 1, 2026 – September 30, 2027

Excludes1 — never code together

The conditions below can never be reported together with O99.4 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

  • peripartum cardiomyopathy (O90.3)

Excludes2 — not included here

The conditions below are not part of O99.4, but a patient may have both at the same time. When documentation supports it, O99.4 and the excluded code may both be reported.

  • hypertensive disorders (O10-O16)
  • obstetric embolism (O88.-)
  • venous complications and cerebrovenous sinus thrombosis in labor, childbirth and the puerperium (O87.-)
  • venous complications and cerebrovenous sinus thrombosis in pregnancy (O22.-)

Inclusion terms

Alternative wording in documentation that is classified to O99.4.

  • Conditions in I00-I99

Excludes1 — never code together — inherited from Chapter 15

The conditions below can never be reported together with O99.4 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.-)

Use additional code — inherited from Chapter 15

Report an additional code alongside O99.4 to fully describe the condition. O99.4 is sequenced first.

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

Use additional code — inherited from O99

Report an additional code alongside O99.4 to fully describe the condition. O99.4 is sequenced first.

  • code to identify specific condition

Excludes2 — not included here — inherited from Chapter 15

The conditions below are not part of O99.4, but a patient may have both at the same time. When documentation supports it, O99.4 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)

Excludes2 — not included here — inherited from O99

The conditions below are not part of O99.4, but a patient may have both at the same time. When documentation supports it, O99.4 and the excluded code may both be reported.

  • when the reason for maternal care is that the condition is known or suspected to have affected the fetus (O35-O36)

What codes fall under O99.4? (3)

How long has O99.4 existed?

O99.4 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 O99.4?

ICD-10-CM declares these codes mutually exclusive with O99.4 — exactly one of each pair can be correct for a given encounter.

What other codes are in the O99 family? (8)