O99.834 Other infection carrier state complicating childbirth

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applies from 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

Applies from O99.8 Other specified diseases and conditions complicating pregnancy, childbirth and the puerperium

Applicable to

• Conditions in D00-D48, H00-H95, M00-N99, and Q00-Q99

Excludes2 (not included here)

• genitourinary infections in pregnancy (O23.-)
• infection of genitourinary tract following delivery (O86.1-O86.4)
• malignant neoplasm complicating pregnancy, childbirth and the puerperium (O9A.1-)
• maternal care for known or suspected abnormality of maternal pelvic organs (O34.-)
• postpartum acute kidney failure (O90.49)
• traumatic injuries in pregnancy (O9A.2-)

Use additional code

• code to identify condition

Applies from O99.83 Other infection carrier state complicating pregnancy, childbirth and the puerperium

Use additional code

• code to identify the carrier state (Z22.-)

MS-DRG index

Defines the logic of DRG(s) 998 in MDC 14.

Approximate ICD-9-CM (GEMs)

• 647.81 Other specified infectious and parasitic diseases of mother, delivered, with or without mention of antepartum condition (approximate)

Medicare Code Edits (MCE v43.1 (April 2026))

• Maternity diagnoses (age 9 through 64): Age conflict edit. These diagnoses are clinically expected only in patients age 9 through 64.

Code annotations containing back-references to O99.834

Back-references to O99.83

• Type 2 Excludes: O98 Maternal infectious and parasitic diseases classifiable elsewhere but complicating pregnancy, childbirth and the puerperium ("infectious carrier state (O99.82-, O99.83-)")

Diagnosis Index entries for O99.834

• Delivery (childbirth) (labor) › complicated › by › infection (maternal) › carrier state NEC

Nearby codes

• O99.820 Streptococcus B carrier state complicating pregnancy
• O99.824 Streptococcus B carrier state complicating childbirth
• O99.825 Streptococcus B carrier state complicating the puerperium
• O99.83 Other infection carrier state complicating pregnancy, childbirth and the puerperium
• O99.830 Other infection carrier state complicating pregnancy
• O99.834 Other infection carrier state complicating childbirth (this code)
• O99.835 Other infection carrier state complicating the puerperium
• O99.84 Bariatric surgery status complicating pregnancy, childbirth and the puerperium
• O99.840 Bariatric surgery status complicating pregnancy, unspecified trimester
• O99.841 Bariatric surgery status complicating pregnancy, first trimester
• O99.842 Bariatric surgery status complicating pregnancy, second trimester