Top 5 Mistakes in Infusions and Hydration Coding to Avoid   1. Not Knowing When to Use CPT Codes 96360 vs 96361 A common mistake in IV hydration coding is misunderstanding when to use CPT codes 96360 and 96361 . 96360  is used for the initial 31–60 minutes of hydration 96361  is an add-on code for each additional hour However, hydration coding depends on what other services are performed during the encounter. If a therapeutic infusion (96365)  or an IV push (96374)  is admini