O99.842 Bariatric surgery status complicating pregnancy, second trimester

Billable ICD-10-CM code, FY2026.

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 O99.84 Bariatric surgery status complicating pregnancy, childbirth and the puerperium

Applicable to

• Gastric banding status complicating pregnancy, childbirth and the puerperium
• Gastric bypass status for obesity complicating pregnancy, childbirth and the puerperium
• Obesity surgery status complicating pregnancy, childbirth and the puerperium

MS-DRG index

Defines the logic of DRG(s) 817-819 in MDC 14.

Approximate ICD-9-CM (GEMs)

• 649.21 Bariatric surgery status complicating pregnancy, childbirth, or the puerperium, delivered, with or without mention of antepartum condition (approximate)
• 649.23 Bariatric surgery status complicating pregnancy, childbirth, or the puerperium, antepartum condition or complication (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 O99.842

Back-references to O99.84

• Type 1 Excludes: Z98.84 Bariatric surgery status ("bariatric surgery status complicating pregnancy, childbirth, or the puerperium (O99.84)")

Nearby codes

• O99.834 Other infection carrier state complicating childbirth
• 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 (this code)
• O99.843 Bariatric surgery status complicating pregnancy, third trimester
• O99.844 Bariatric surgery status complicating childbirth
• O99.845 Bariatric surgery status complicating the puerperium
• O99.89 Other specified diseases and conditions complicating pregnancy, childbirth and the puerperium
• O99.891 Other specified diseases and conditions complicating pregnancy