O99.11 – Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy

ICD-10-CM 2027 diagnosis code · Other obstetric conditions, not elsewhere classified

Non-billable header

ICD-10-CM code O99.11

Code: O99.11 (claims format: O9911)
Description: Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy
Short description: Oth diseases of the bld/bld-form org/immun mechnsm comp preg
Billable: No – use a more specific code below
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 15. Pregnancy, childbirth and the puerperium (O00-O9A)
Block: O94-O9A Other obstetric conditions, not elsewhere classified
Parent codes: O99 › O99.1

Billable codes under O99.11

O99.11 is a header code and cannot be used on claims. Choose the most specific code:

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

O99 – Other maternal diseases classifiable elsewhere but complicating 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

O99.1 – Other diseases of the blood and blood-forming organs and certain disorders involving the immune mechanism complicating pregnancy, childbirth and the puerperium

Applicable to:

Conditions in D65-D89

Excludes1 (not coded here):

hemorrhage with coagulation defects (O45.-, O46.0-, O67.0, O72.3)

Index terms for O99.11

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in O99.1

Frequently asked questions

What is ICD-10 code O99.11?

O99.11 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, in the block O94-O9A (Other obstetric conditions, not elsewhere classified).

Is O99.11 a billable code?

No. O99.11 is a header code with more specific child codes; report one of the billable codes listed above.

What category does O99.11 belong to?

It belongs to category O99 – Other maternal diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.