- 2,177
99201 to 99215. One set of codes for new patients and one set for existing patients (rate is a little higher for new patients to take into account administrative cost of setting up the new patient). Code is based on severity of the condition being treated and the amount of time spent with the doctor. The "copay" isn't really a copay. It's 20% coinsurance of the Medicare physicians fee schedule rate for that code, not to exceed $20. For a brief visit for a mild condition the "copay" can be as little as $8.Can someone tell me what these codes are? Or a link to somewhere that says this information? I'm getting conflicting information from a few different carriers.