Care Center Search Sierra Nevada Diagnostic Center 155 Glasson Way, Building 4 Grass Valley, CA 95945 (530) 274-6630 Enter your starting address to get Driving Directions to Sierra Nevada Diagnostic Center. Indicates a required field Street Address: City: State: AB AK AL AR AZ BC CA CO CT DC DE FL GA IA ID IL IN KS KY LA MA MB MD ME MI MO MN MS MT NB NC ND NE NF NH NJ NM NS NV NY OH OK ON OR PA PE PQ RI SC SD SK TN TX UT VA VT WA WI WV ZIP: Disclaimer