Seeking Excellent Endocrinologist

My mother (66) will be moving to the Bay Area this year and is seeking to establish a healthcare network up here. 

She will need a primary care doctor but also an endocrinologist as she has hypothyroidism and was recently diagnosed with hyperparathyroidism and severe osteoporosis. Does anyone have experience with an excellent, caring, and gentle endocrinologist they've had a good experience with? She is on Medicare Parts A+Band Cigna Supplement. 

Thank you so much in advance!