Which pair of codes is used to document pregnancy with Type 1 diabetes at 18 weeks?

Which pair of codes is used to document pregnancy with Type 1 diabetes at 18 weeks?

• A. O24.012, Z3A.08
• B. O24.0, Z3A.18
• C. O24.012, Z3A.18
• D. O24.013, Z3A.18

Answer: (C)

Documenting a pregnancy with preexisting diabetes requires two pieces of information: the diabetes type in pregnancy and the exact gestational age. O24.012 specifies Type 1 diabetes mellitus in pregnancy, and Z3A.18 codes the pregnancy at 18 weeks. Together, they precisely indicate a pregnancy complicated by Type 1 diabetes at 18 weeks. Using a different diabetes type code or a different gestational week would misrepresent either the condition or the timing, which is why this pairing is the correct choice.

Documenting a pregnancy with preexisting diabetes requires two pieces of information: the diabetes type in pregnancy and the exact gestational age. O24.012 specifies Type 1 diabetes mellitus in pregnancy, and Z3A.18 codes the pregnancy at 18 weeks. Together, they precisely indicate a pregnancy complicated by Type 1 diabetes at 18 weeks. Using a different diabetes type code or a different gestational week would misrepresent either the condition or the timing, which is why this pairing is the correct choice.