Cracking the Code
Obstetric Patient with Complications
When an obstetric patient is admitted to a hospital for complications of pregnancy during one trimester and remains in the hospital into a subsequent trimester, then it is appropriate to report the trimester character for when the complication developed. For example, if a patient is admitted into inpatient status for a complication during their second trimester but is in their third trimester at the time of discharge, then the correct character assignment for the antepartum complication code should be for the second trimester.
O99.511, diseases of the respiratory system complicating pregnancy, first trimester
J12.82, pneumonia due to COVID-19
Z3A.13, 13 weeks of gestation of pregnancy