Most insurance companies cover the medication itself. However many people choose to pay for it themselves to keep their condition private. There are some doctors that will only take cash. It is one of the many unfair aspects of this disease. It pays to shop around. A doctor can choose what if any insurance they will accept (in some states). Every week more doctors are certified to prescribe. Some patients start with the first doctor they can get an appointment with,then find a more reasonably priced one later.
In the United States most physicians in private practice are for-profit businesses. Our free enterprise system allows them to charge what they feel the market will bare and it is up to the individual physicians to accept or not accept private insurance. If you do have insurance, many companies will allow you to submit the claim yourself for direct reimbursement. If your plan covers behavioral health conditions demand they pay your claim. Some insurance companies still feel that they can discriminate against people with addictive disorders. Most states have laws requiring insurance plans to cover addiction treatment. HBO addressed this in a documentary
To suppress the debilitating symptoms of cravings and withdrawal, enabling the patient to engage in therapy, counseling and support, so they can implement positive long-term changes in their lives which develops into the new healthy patterns of behavior necessary to achieve sustained addiction remission. - explain -