counties where Partnership operated had among the highest rates of opioid prescribing and overdose in the state. Hydro­codone was the top-prescribed medication among Partnership patients, who include more than 570,000 Medi-Cal recipients from the vineyards of Sonoma County to the redwoods on the Oregon border. In Lake County, a poor, rural area bordering Sonoma, enough opioid painkillers were prescribed in 2013 to medicate every man, woman, and child with opioids for five months, according to a report by the California Health Care Foundation.