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O10.91

Non-billable

Unspecified pre-existing hypertension complicating pregnancy

O10.91 is the ICD-10-CM code for Unspecified pre-existing hypertension complicating pregnancy. It is a non-billable category code — use a more specific child code such as O10.911 for billing.

Status
Header (non-billable)
Chapter
O00-O9A
Parent
O10.9
Subcodes
4
Edition
FY2026

O00-O9A Pregnancy, childbirth and the puerperium

No additional coding notes for this code.

Frequently asked questions

What is ICD-10 code O10.91?
O10.91 is the ICD-10-CM code for "Unspecified pre-existing hypertension complicating pregnancy". It falls under O00-O9A Pregnancy, childbirth and the puerperium.
Is O10.91 a billable code?
No — O10.91 is a non-billable header code. Use a more specific child code (such as O10.911) for billing.
What are the subcodes of O10.91?
O10.91 has 4 more specific child codes, including O10.911, O10.912, O10.913.

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

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