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O16

Non-billable

Unspecified maternal hypertension

O16 is the ICD-10-CM code for Unspecified maternal hypertension. It is a non-billable category code — use a more specific child code such as O16.1 for billing.

Status
Header (non-billable)
Chapter
O00-O9A
Subcodes
6
Edition
FY2026

O00-O9A Pregnancy, childbirth and the puerperium

No additional coding notes for this code.

Frequently asked questions

What is ICD-10 code O16?
O16 is the ICD-10-CM code for "Unspecified maternal hypertension". It falls under O00-O9A Pregnancy, childbirth and the puerperium.
Is O16 a billable code?
No — O16 is a non-billable header code. Use a more specific child code (such as O16.1) for billing.
What are the subcodes of O16?
O16 has 6 more specific child codes, including O16.1, O16.2, O16.3.

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

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