Hi, TID. Toni is speaking of what once was known as the "indigent drug program" that all pharmaceutical companies participate in for certain drugs. As she stated, it requires a letter to the drug company from your doctor (or completion of a form) for the drug you need, stating that you need the med but cannot afford to pay for it, accompanied by an Rx from your doctor. Some companies ship the meds to the doc's office, and others send you vouchers you can use for the drugs at the pharmacy. They supply 3 mos. at a time.
I'm not exactly sure what you mean by a "gap." Is this the difference between what the ins. company pays and the actual total cost of the med to you? Do you qualify for Medicaid? They will pay your Part D (Rx) premium if you qualify financially. There are many insurance companies out there covering Part D drugs. Contact Medicare and request a list of them! When you contact the insurance companies, ask if they cover the drugs you take and what your co-pay will be.