O9A.311 Physical abuse complicating pregnancy, first trimester

Billable ICD-10-CM code, FY2026.

Applies from O9A.3 Physical abuse complicating pregnancy, childbirth and the puerperium

Applicable to

• Conditions in T74.11 or T76.11

Excludes2 (not included here)

• sexual abuse complicating pregnancy, childbirth and the puerperium (O9A.4)

Use additional code

• code (if applicable):
• to identify any associated current injury due to physical abuse
• to identify the perpetrator of abuse (Y07.-)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 648.91 Other current conditions classifiable elsewhere of mother, delivered, with or without mention of antepartum condition (approximate)
• 648.93 Other current conditions classifiable elsewhere of mother, 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 O9A.311

Back-references to O9A.3

• Type 2 Excludes: O9A.2 Injury, poisoning and certain other consequences of external causes complicating pregnancy, childbirth and the puerperium ("physical, sexual and psychological abuse complicating pregnancy, childbirth and the puerperium (O9A.3-, O9A.4-, O9A.5-)")
• Type 1 Excludes: T74 Adult and child abuse, neglect and other maltreatment, confirmed ("abuse and maltreatment in pregnancy (O9A.3-, O9A.4-, O9A.5-)")
• Type 1 Excludes: T76 Adult and child abuse, neglect and other maltreatment, suspected ("suspected abuse and maltreatment in pregnancy (O9A.3-, O9A.4-, O9A.5-)")

Back-references to O9A

• Type 1 Excludes: Z33.1 Pregnant state, incidental ("complications of pregnancy (O00-O9A)")
• Type 1 Excludes: Z34 Encounter for supervision of normal pregnancy ("any complication of pregnancy (O00-O9A)")
• Code First: Z3A Weeks of gestation ("obstetric condition or encounter for delivery (O09-O60, O80-O82, O94-O9A)")

Nearby codes

• O9A.219 Injury, poisoning and certain other consequences of external causes complicating pregnancy, unspecified trimester
• O9A.22 Injury, poisoning and certain other consequences of external causes complicating childbirth
• O9A.23 Injury, poisoning and certain other consequences of external causes complicating the puerperium
• O9A.3 Physical abuse complicating pregnancy, childbirth and the puerperium
• O9A.31 Physical abuse complicating pregnancy
• O9A.311 Physical abuse complicating pregnancy, first trimester (this code)
• O9A.312 Physical abuse complicating pregnancy, second trimester
• O9A.313 Physical abuse complicating pregnancy, third trimester
• O9A.319 Physical abuse complicating pregnancy, unspecified trimester
• O9A.32 Physical abuse complicating childbirth
• O9A.33 Physical abuse complicating the puerperium