I work in a nursing facility and need to know where I can get phone #'s for medicare co-insurance companies?

I work in a nursing facility in the admissions office and need to verify insurance prior to admitting a resident. I need phone #'s for insurance companies which are a supplement to medicare such as AARP, Aetna, BCBS, Cigna, United Health Care, Bankers Life, Humana Gold,and other insurance companies. Is there a list of these phone #'s? (toll free preferably but if not, other phone #'s will do) I need them to verify insurance coverage for residents.

I would suggest calling your State Insurance Commissioner's office. They would also have phone numbers for the insurance companies that provide coverage and, I'm betting, would have a publication or list of Medicare supplemental policies. This office is responsible for every insurance policy sold in your state. Good folks to know. Check it out! Good luck!