These traveling clinics deny that they accept your insurance (an outright lie) and require you to pay in full for flu shots. When you submit the bill to your insurance company, you find out that Mollen IS a "network" provider and is under a pre-negotiated rate contract with your insurer, and therefore you can only get reimbursed for the pre-negotiated rate (which is ~40% less than what you actually paid). Mollen's will not reimburse the difference, even with the assistance of your insurance carrier. They are nothing but cheap scam artists preying on consumers. I urge everyone to stay away from Mollen Immunization Clinics. Do NOT do business with them. If you must deal with them, DO NOT believe anything they say; Get everything they tell you in writing; and don't sign anything or pay for anything in cash.