Four Coding Myths That Will Cost You Ob-Gyn coding is a serious medical billing issue. There are many assumptions and myths that billers make when filing claims. Assumptions can cost your practice a lot of money. There are four myths in Ob-Gyn medical billing you should forget. 1st MythIt is incorrect to bill separately for the initial blood work with a nurse and also the initial ob-gyn visit. If blood work is being done, that should be included in the initial visit code, or the global package in medical billing. If your practice has been billing separately for these services, you may eventually need to repay overpayments. 2nd MythAnother myth …