O99.411 – Diseases of the circulatory system complicating pregnancy, first trimester

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

Billable code

ICD-10-CM code O99.411

Code: O99.411 (claims format: O99411)
Description: Diseases of the circulatory system complicating pregnancy, first trimester
Short description: Diseases of the circ sys comp pregnancy, first trimester
Billable: Yes – valid for HIPAA-covered transactions
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 › O99.4 › O99.41

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

O99.4 – Diseases of the circulatory system complicating pregnancy, childbirth and the puerperium

Applicable to:

Conditions in I00-I99

Excludes1 (not coded here):

peripartum cardiomyopathy (O90.3)

Excludes2 (not included here):

hypertensive disorders (O10-O16)
obstetric embolism (O88.-)
venous complications and cerebrovenous sinus thrombosis in labor, childbirth and the puerperium (O87.-)
venous complications and cerebrovenous sinus thrombosis in pregnancy (O22.-)

Related codes in O99.41

Frequently asked questions

What is ICD-10 code O99.411?

O99.411 is the ICD-10-CM code for diseases of the circulatory system complicating pregnancy, first trimester, in the block O94-O9A (Other obstetric conditions, not elsewhere classified).

Is O99.411 a billable code?

Yes. O99.411 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does O99.411 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.