If you read the Official guidelines at the front of the ICD-9 book for Chapter 11 it states:
Originally Posted by vickizenier
"Obstetric cases require codes from chapter 11, codes in the range 630-679, Complications of Pregnancy, Childbirth, and the Puerperium. Chapter 11 codes have sequencing priority over codes from other chapters. Additional codes from other chapters may be used in conjunction with chapter 11 codes to further specify conditions. Should the provider document that the pregnancy is incidental to the encounter, then code V22.2 should be used in place of any chapter 11 codes. It is the provider's responsibility to state that the condition being treated is not affecting the pregnancy."
This means that unless the provider says the abdominal pain is not affecting the pregnancy, you must default to a complication code in the 630-679 codes in Chapter 11. If the provider states in the record that the condition is not affecting the pregnancy, then you may use a code from the other chapters and use V22.2 to indicate that the patient is also pregnant.
Arlene J. Smith, CPC, CEMC, COBGC
AAPC Tacoma WA Chapter
Past-President 2013 and 2011
Member Relations 2008
AAPC NAB 2007-2009