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O36.83

⚠ Non-billable (Header)

Maternal care for abnormalities of the fetal heart rate or rhythm

Pregnancy, childbirth and the puerperium (O00-O9A)

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

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Also Known As

Maternal care for depressed fetal heart rate tonesMaternal care for fetal bradycardiaMaternal care for fetal heart rate abnormal variabilityMaternal care for fetal heart rate decelerationsMaternal care for fetal heart rate irregularityMaternal care for fetal tachycardiaMaternal care for non-reassuring fetal heart rate or rhythm

❌ 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 (4)

O36.831Maternal care for abnormalities of the fetal heart rate or rhythm, first trimesterO36.832Maternal care for abnormalities of the fetal heart rate or rhythm, second trimesterO36.833Maternal care for abnormalities of the fetal heart rate or rhythm, third trimesterO36.839Maternal care for abnormalities of the fetal heart rate or rhythm, unspecified trimester

Clinical Description

ICD-10-CM code O36.83 represents maternal care for abnormalities of the fetal heart rate or rhythm. 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 6-character code at the 5th level of specificity. There are 4 more specific child codes under O36.83. Coders should note that O36.83 has 2 Excludes1 restriction(s) — codes that cannot be reported together on the same claim.

Frequently Asked Questions

What is ICD-10 code O36.83?

ICD-10-CM code O36.83 is "Maternal care for abnormalities of the fetal heart rate or rhythm". It belongs to the category: Pregnancy, childbirth and the puerperium (O00-O9A).

Is O36.83 a billable ICD-10 code?

No, O36.83 is a non-billable header code. A more specific child code must be used for billing.

What codes are excluded with O36.83?

O36.83 has 2 Excludes1 rule(s). These codes are mutually exclusive and cannot be coded together on the same claim.

Can O36.83 be coded with other codes?

O36.83 has 1 Excludes2 note(s). These conditions can be coded together if both are documented in the patient record.

Related Codes in O36.8

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

O36.80Pregnancy with inconclusive fetal viabilityO36.81Decreased fetal movementsO36.82Fetal anemia and thrombocytopeniaO36.89Maternal care for other specified fetal problems

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Code Information

CodeO36.83
BillableNo — Header code
ParentO36.8
CategoryPregnancy, childbirth and the puerperium (O00-O9A)
Excludes12 rule(s)
Excludes21 note(s)
Child codes4

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)