Wiki Z34 codes

[jlv1980]

If we need to charge out OB visits for a patient to submit into her insurance company because she's moving and we charge out the number of visits and the patient has had a normal 1st pregnancy, we'd use Z34 code (Chapter 21) My questions is; do we need to use a secondary code from the Z3A category(also chapter 21) showing weeks gestataion or are the Z3A codes only needed as an additional code when using codes from Chapter 15?

 

[D-yana]

Additional question related to this

If we're billing 59425 or 59426, it typically spans trimesters. Do we use a Z34 code for each trimester during which the services were rendered, or just the trimester they were in on the date of the last visit?