LOS ANGELES — It wasn’t exactly an emergency, but Michael Reed, a security guard who lives in Watts, had back pain and ran out of his blood pressure medication. Unsure where else to turn, he went to his local emergency room for a refill. Around the same time, James Woodard, a homeless man, appeared for his third visit that week. He wasn’t in medical distress. Nurses said he was likely high on meth and just looking for a place to rest. In an overflow tent outside, Edward Green, a restaurant cook, described hearing voices and needing medication for his bipolar disorder. The three patients were a…