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O99

Non-billable

Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium

O99 is the ICD-10-CM code for Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium. It is a non-billable category code — use a more specific child code such as O99.0 for billing.

Status
Header (non-billable)
Chapter
O00-O9A
Subcodes
9
Edition
FY2026

O00-O9A Pregnancy, childbirth and the puerperium

Includes

  • •conditions which complicate the pregnant state, are aggravated by the pregnancy or are a main reason for obstetric care

Excludes2 — not included here

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

Use additional code

  • •code to identify specific condition

Frequently asked questions

What is ICD-10 code O99?
O99 is the ICD-10-CM code for "Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium". It falls under O00-O9A Pregnancy, childbirth and the puerperium.
Is O99 a billable code?
No — O99 is a non-billable header code. Use a more specific child code (such as O99.0) for billing.
What are the subcodes of O99?
O99 has 9 more specific child codes, including O99.0, O99.1, O99.2.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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