By Danielle Wagar, CPES | Upstate Healthcare Admin Here is a scenario that plays out in mental health practices regularly: a provider completes Medicare enrollment, receives their PTAN, and starts seeing Medicare patients. A few months in, they notice some Medicare patients have cards that say Humana, UnitedHealthcare, or Aetna. Claims are submitting to the wrong payer. Prior authorization requirements keep appearing unexpectedly. The answer is that Medicare is not one thing.