WASHINGTON (AP) — Some of the nation's best cancer hospitals have been left out by insurers selling coverage under President Barack Obama's health care law.

For example, Seattle Cancer Care Alliance was excluded by five of eight insurers in the state's insurance exchange, or marketplace. MD Anderson is in less than half the exchange plans in the Houston metro area. Siteman Cancer Center in St. Louis is in some plans offered by one of two insurers on the Missouri exchange.

Only four of 19 nationally recognized cancer centers that responded to an Associated Press survey said patients have access through all the insurers in their states' exchanges.

Before the new health care law, a cancer diagnosis could make you uninsurable. Now, you can get coverage, but the obstacles may be more subtle.

More From 99.9 KTDY