Who We Are

David Herbert, M.D.
President/CEO
(916) 887-4953
david.herbert@sutterhealth.org

Jose A. Arevalo, M.D.
Chief Medical Executive
(916) 887-4904
jose.arevalo@sutterhealth.org

Mark Vaughan, M.D.
Chairman of the Board
Specialty: Family Medicine
Phone: (530) 886-8630

Adarsh Bhat, M.D.
Secretary
​Specialty: Nephrology
Phone: (916) 789-1505

Richard Areen, M.D.
Treasurer
​Specialty: Otolaryngology
Phone: (916) 736-3399

Muhammed Afzal, M.D.
Specialty: Pulmonary/Critical Care
Phone: (916) 325-1040

Naveen Atray, M.D.
Specialty: Nephrology
Phone: (916) 929-8564

Lakshmi Avala, M.D.
Specialty: Pediatrics
Phone: (916) 722-4791

Dheeraj Kamra, MD
​Specialty: Internal Medicine
​Phone: (916) 966-8500

Margaret Parsons, M.D.
Specialty: Dermatology
Phone: (916) 739-1505

AlexandraMary Kelada, D.O.
Specialty: Internal Medicine
Phone: (916) 786-4700

Hussam Kujok, M.D.
Specialty: Internal Medicine
Phone: (916) 971-9000

Patricia Sierra, M.D.
Specialty: Ophthalmology
Phone: (916) 649-1515

Alvin Sockolov, M.D.
Specialty: Family Medicine
​Phone: (916) 927-1114

Jonathan Thygeson, M.D.
Specialty: Pediatrics
​Phone: (916) 924-8754

Manish Upadhyay, MD
​Specialty: Endocrinology
Phone: (916) 786-6727

Mohammad Yusufzai, M.D.
Specialty: Internal Medicine
​Phone: (916) 331-1333