O99.1

Non-billable

Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, childbirth and the puerperium

O99.1 is the ICD-10-CM code for Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, childbirth and the puerperium. It is a non-billable category code — use a more specific child code such as O99.11 for billing.

Status
Header (non-billable)
Chapter
O00-O9A
Parent
O99
Subcodes
3
Edition
FY2026

O00-O9A Pregnancy, childbirth and the puerperium

Includes

Excludes1 — not coded here

Frequently asked questions

What is ICD-10 code O99.1?
O99.1 is the ICD-10-CM code for "Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, childbirth and the puerperium". It falls under O00-O9A Pregnancy, childbirth and the puerperium.
Is O99.1 a billable code?
No — O99.1 is a non-billable header code. Use a more specific child code (such as O99.11) for billing.
What are the subcodes of O99.1?
O99.1 has 3 more specific child codes, including O99.11, O99.12, O99.13.
What is excluded from O99.1?
Excludes1 (not coded here): hemorrhage with coagulation defects (O45.-, O46.0-, O67.0, O72.3).

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

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