2022 Provider Portal; Provider Portal; COVID-19 Provider Resources; Grievance Process; Prior Authorization Form; Pharmacy Coverage for CCH Members; ... Yangming Cao, MD. Home ยป Yangming Cao, MD; Nephrology Primary Address. The Nephrology Group Inc 1205 Evergreen St Selma, CA 93662 (559) 228-6600 (559) 226-3709..