Coding for respiratory tract infections and other conditions during pregnancy

Hi, I have lot confusions on coding of pregnancy cases.

When a pregnant patient is admitted with acute bronchitis, do we need to start coding with "O" series code as primary or "J" series code. can anyone tell me , how to code conditions which are not related to pregancy!!!!!

Thanks in advance........................

re: Coding for respiratory tract infections and other conditions during pregnancy

Chapter 15 codes have sequencing priority over any other code(s), see the ICD-10-CM guidelines on coding from Chapter 15, (O00-O9A)

"Codes from chapter 15 and sequencing priority.
Obstetric cases require codes from chapter 15, codes in the range O00-O9A, Pregnancy, Childbirth, and the Puerperium. Chapter 15 codes have sequencing priority over codes from other chapters. Additional codes from other chapters may be used in conjunction with chapter 15 codes to further specify conditions. Should the provider document that the pregnancy is incidental to the encounter, then code Z33.1, Pregnant state, incidental, should be used in place of any chapter 15 codes. It is the provider’s responsibility to state that the condition being treated is not affecting the pregnancy."