While it seems progressive to cover treatments that don't fall under the traditional medical purview, it also could pose a potential danger to consumers' pocketbooks or their health.
The idea that alternative medicine is covered by insurance may push people toward treatments that either don't make them well or have unknown risks. Herbal supplements touted to treat depression don't have the same health and regulatory oversight as say, Prozac.
Also, consumers need to understand what costs their plans will pay for. Insurers may cover a narrow range of services, such as some types of back pain, from a chiropractor. But if a chiropractor also offers treatments for asthma or ear infections, the patient may think he is covered for the other ailments, just because the provider is in his network, and he gets stuck with the bill.