About Us
Well-established Rheumatology Practice in NorCal
Sierra Rheumatology Inc, providing rheumatology consultation & infusion services to greater Sacramento area is located in Rocklin, CA.
The practice had been established in 1980’s by our esteemed Dr Hazelwood, who has further passed on the auspices of the institution first to Dr Bhat and in 2018 to Dr Dhillon who has carried on the legacy of top-class rheumatological care, individualized treatment plans, by carefully listening to the patients, following simple principles of dignity, respect, patience, understanding to meet the growing demand for high quality rheumatology care for patients with various forms of arthritis and auto-immune disease. We will work closely with your PCP & other specialist doctors to improve your overall health, maintaining effective cross-communication. By accepting EHR & mostly paperless environment, we have tried to create an effective and efficient referral, care & co-ordination process.
Our Mission
To provide compassionate, timely, and convenient care to patients with arthritis and auto-immune diseases in Greater Sacramanento & NorCal area.
Our Vision
Improve access to timely, high quality and compassionate care to patients with arthritis and various auto-immune diseases in Greater Sacramanento & NorCal area.
Meet our Team:
The practice of medicine requires teamwork. Each member of our care team plays an important role in achieving the primary objective of making you healthier and happier. Our care team is centered around our patients, and each patient plays an important role as well. Please let us know your goals and objectives, so we can do our best to provide the healthcare you want, need, and deserve.
Ravneet K. Dhillon, Administrator
Rosemarie Co, Nurse Practitioner
Robinder Dhillon, M.D
Robinder has extensive clinical and research experience since 2004, after finishing medical school gaining work experience in five countries and over twenty different hospitals including NIH, John’s Hopkins Hospital, Wayne State University, University of Rochester, Mayo Clinic, Oxford-Radcliffe Hospital UK, Queens Medical Center UK, Christian Medical College and Dame Edith Brown Memorial Hospital, India & many more hospital locations. Robinder was awarded the ‘Young Investigator Award’ by the American Society of Bone and Mineral Research in 2012 annual meeting for his basic science bench research at the Center for Musculoskeletal Research in Rochester, New York, studying the effects of PTH on femoral allograft healing and angiogenesis. He is the first author on an original research article in the Journal of Bone and Mineral Research, he has also authored review articles, book chapters and has coauthored several other peer-reviewed publications. He completed his residency at Wayne State University and Rheumatology Fellowship at the National Institutes of Health in Bethesda, Maryland. During his fellowship, he worked with Dr. Mike Ward on clinical outcomes research studies, with special focus on rheumatoid arthritis and lupus. He is board certified in Internal Medicine and Rheumatology and proud to bring his international expertise to care for Greater Sacramento area community.












Insurances we take


















We are affiliated with Hill Physicians and Sutter Independent Physicians.
We encourage our patients to take advantage of Sutter’s My Health Online functionality to contact our Physicians/NP directly by secure portal.
PLEASE NOTE: The portal communication is only for non-urgent matters, for any medical emergencies please go to the nearest Emergency Room (ER). Response time for reply may vary from 2 to 7 days depending on the provider schedule and availability.
Notice To Consumers: Medical doctors are licensed and regulated by the Medical Board of California | 800-633- 2322 | www.mbc.ca.gov