O34.40 Maternal care for other abnormalities of cervix, unspecified trimester

Billable ICD-10-CM code, FY2026.

Applies from O34 Maternal care for abnormality of pelvic organs

Includes

• the listed conditions as a reason for hospitalization or other obstetric care of the mother, or for cesarean delivery before onset of labor

Code first

• any associated obstructed labor (O65.5)

Use additional code

• code for specific condition

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 654.60 Other congenital or acquired abnormality of cervix, unspecified as to episode of care or not applicable (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 O34.40

Back-references to O34.4

• Type 2 Excludes: O34.1 Maternal care for benign tumor of corpus uteri ("maternal care for benign tumor of cervix (O34.4-)")
• Type 2 Excludes: O9A.1 Malignant neoplasm complicating pregnancy, childbirth and the puerperium ("maternal care for benign tumor of cervix (O34.4-)")

Back-references to O34

• Use Additional: O65.5 Obstructed labor due to abnormality of maternal pelvic organs ("code to identify abnormality of pelvic organs O34.-")
• Type 2 Excludes: O99.8 Other specified diseases and conditions complicating pregnancy, childbirth and the puerperium ("maternal care for known or suspected abnormality of maternal pelvic organs (O34.-)")

Nearby codes

• O34.30 Maternal care for cervical incompetence, unspecified trimester
• O34.31 Maternal care for cervical incompetence, first trimester
• O34.32 Maternal care for cervical incompetence, second trimester
• O34.33 Maternal care for cervical incompetence, third trimester
• O34.4 Maternal care for other abnormalities of cervix
• O34.40 Maternal care for other abnormalities of cervix, unspecified trimester (this code)
• O34.41 Maternal care for other abnormalities of cervix, first trimester
• O34.42 Maternal care for other abnormalities of cervix, second trimester
• O34.43 Maternal care for other abnormalities of cervix, third trimester
• O34.5 Maternal care for other abnormalities of gravid uterus
• O34.51 Maternal care for incarceration of gravid uterus