I have sent claims to Blue Shield of CA via fax and also snail mail and the department that handles out of network provider claims is highly incompetent. They either claim to lose the superbill/claim or if received, they process the claim incorrectly. For instance, they'll state it is missing a diagnosis or procedure code but when I sent the claim with the bill, it states the info they are seeking right on the superbill. On average, for every family member's claim, I will have to follow up with them on multiple occassions to have it paid according to my PPO plan. One time, they hugely overpaid by $2,000! As an honest person, I called them to thank them for finally paying out the claim but it was incorrect. They tried once again. It takes on average 9 months from the time you submit a claim, multiple half hour to one hour conversations with the claims department intermittently throughout a few seasons before claims are paid accordingly. Most of the representatives I've spoken to are out of this country- possibly the Phillipines. When you ask for a supervisor, they will place you on a 20 minute hold, just to come back to the line and advise that no supervisors are available. I would avoid doing business with this inept company at all costs!!