O36.839

⚠ Non-billable (Header)

Maternal care for abnormalities of the fetal heart rate or rhythm, unspecified trimester

Pregnancy, childbirth and the puerperium (O00-O9A)

⚠️ This is a category header code — not billable. Use a more specific child code below.

Check This Code

❌ Excludes1

inherited

Rules inherited from parent codes in the hierarchy.

O36

• encounter for suspected maternal and fetal conditions ruled out (Z03.7-)
• placental transfusion syndromes (O43.0-)

⚠️ Excludes2

inherited

Rules inherited from parent codes.

O36

• labor and delivery complicated by fetal stress (O77.-)

Child Codes (7)

O36.8390Maternal care for abnormalities of the fetal heart rate or rhythm, unspecified trimester, not applicable or unspecified✓ Billable O36.8391Maternal care for abnormalities of the fetal heart rate or rhythm, unspecified trimester, fetus 1✓ Billable O36.8392Maternal care for abnormalities of the fetal heart rate or rhythm, unspecified trimester, fetus 2✓ Billable O36.8393Maternal care for abnormalities of the fetal heart rate or rhythm, unspecified trimester, fetus 3✓ Billable O36.8394Maternal care for abnormalities of the fetal heart rate or rhythm, unspecified trimester, fetus 4✓ Billable O36.8395Maternal care for abnormalities of the fetal heart rate or rhythm, unspecified trimester, fetus 5✓ Billable O36.8399Maternal care for abnormalities of the fetal heart rate or rhythm, unspecified trimester, other fetus✓ Billable

Clinical Description

ICD-10-CM code O36.839 represents maternal care for abnormalities of the fetal heart rate or rhythm, unspecified trimester. This code falls under the Pregnancy, childbirth and the puerperium (O00-O9A) classification. It is a non-billable category header code. A more specific child code from the list below must be used for billing and reimbursement purposes.

This is a 7-character code at the 6th level of specificity. There are 7 more specific child codes under O36.839. Coders should note that O36.839 has 2 Excludes1 restriction(s) — codes that cannot be reported together on the same claim.

Frequently Asked Questions

What is ICD-10 code O36.839?

ICD-10-CM code O36.839 is "Maternal care for abnormalities of the fetal heart rate or rhythm, unspecified trimester". It belongs to the category: Pregnancy, childbirth and the puerperium (O00-O9A).

Is O36.839 a billable ICD-10 code?

No, O36.839 is a non-billable header code. A more specific child code must be used for billing.

What codes are excluded with O36.839?

O36.839 has 2 Excludes1 rule(s). These codes are mutually exclusive and cannot be coded together on the same claim.

Can O36.839 be coded with other codes?

O36.839 has 1 Excludes2 note(s). These conditions can be coded together if both are documented in the patient record.

Related Codes in O36.83

Other codes in the same category that may be relevant for differential coding:

O36.831Maternal care for abnormalities of the fetal heart rate or rhythm, first trimester O36.832Maternal care for abnormalities of the fetal heart rate or rhythm, second trimester O36.833Maternal care for abnormalities of the fetal heart rate or rhythm, third trimester

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Code Information

CodeO36.839

BillableNo — Header code

ParentO36.83

CategoryPregnancy, childbirth and the puerperium (O00-O9A)

Excludes12 rule(s)

Excludes21 note(s)

Child codes7

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)