Without going into too much detail, I am under an HMO and I was referred to a specialist in May by my primary care physician. The case is still waiting review from the specialist, and back in May they said the earliest they are scheduling initial appointments is October.
My wife had a similar situation a couple of years ago. The issue was significant pain in a particular joint that forced her to give up hobbies she enjoyed and limited her ability to do her work: not a minor problem. First it took a while just to get the MRI. Then it took a month or two to get in to see the resident, who didn't actually do anything other than say, "you should come back to see the specialist." It took months more to get in to see the specialist. Once we did, he was great. He told us not to get surgery and to ignore any joint specialists who recommended surgery (using the, "if you have a hammer..." analogy). Instead, he suggested she work with the vocational rehab specialists in the neighboring unit at the hospital.
Trouble was, the HMO then decided that it had physical therapists on staff who did injury rehab, so why should she go to the hospital to see the vocational specialists? Um, because the specialist they had paid to evaluate her injury said they knew better how to handle that particular kind of injury? Sorry, no dice. I don't know that that injury ever got adequately treated: as far as I know (we aren't speaking these days) she just figured out how to suffer through it.
It's worth pointing out here that the HMO suffers absolutely no penalty for allowing my wife's injury to persist for months or years untreated. The longer she goes without treatment, the more money they make. And if the condition ever does develop to a level of severity that requires expensive medical intervention, they will almost certainly be off the hook, since they won't be covering her any more.
It really pisses me off that the health care debate so often focuses exclusively on the uninsured. Yes, it is appalling that so many people in this country lack any health coverage at all. It is also appalling that many more people than that have health coverage that is so miserly as to be dangerous. We have a system in which the companies in charge of authorizing and paying for care have very very strong incentives to discourage people from getting care, and they do. The ridiculous waits for specialists are part and parcel of this problem.
I agree with ITL. In this system, it is not only erroneous but dangerous to assume that following your doctor's instructions will in itself make you healthier. Too much of the system (such as the wait for referrals) is beyond the doctor's control. Instead of counting on their doctors, people have to advocate vigorously on their own behalf. Be assertive with your doctor about your concerns. If the doctor can't help, take it to the HMO. Make noise.
The squeaky wheel gets the grease. The well-oiled wheel just keeps spinning in circles until it dies.