Advanced rheumatology, tailored to you.
Board-certified care for autoimmune & inflammatory disease — with a quiet, individualized infusion center. Led by Dr. Robinder Dhillon, MD, drawing on two decades of research at the NIH, Johns Hopkins, Mayo Clinic and Oxford.
World-class institutions, brought home to Rocklin.
Dr. Dhillon's training spans five countries and twenty hospitals — from the National Institutes of Health to Oxford-Radcliffe.
Specialty care, defined by depth — and dignity.
Sierra Rheumatology is an independent, physician-led practice in Rocklin dedicated exclusively to autoimmune and inflammatory conditions. We pair rigorous, research-backed diagnostics with calm, unhurried visits — so you leave with a plan, not just a prescription.
Symptoms can appear almost anywhere — your care shouldn't be fragmented.
Rheumatic conditions can affect joints, skin, blood vessels, organs, nerves and bones. We bring all of it under one roof — diagnosis, monitoring, imaging review, infusion therapy, and long-term management.
- 01JointsInflammatory & degenerative arthritis.
- 02Skin & connective tissueLupus, scleroderma, dermatomyositis.
- 03Vessels & organsVasculitis, organ-involving autoimmune disease.
- 04Bones & nervesOsteoporosis, neuropathy, soft-tissue conditions.
30+ Rheumatic, Autoimmune & Inflammatory Conditions.
From the most common forms of arthritis to complex vasculitis and connective tissue disorders — we evaluate, diagnose and manage them all under one roof.
- Rheumatoid arthritis
- Psoriatic arthritis
- Gout
- Osteoarthritis
- Ankylosing spondylitis
- Lupus (SLE)
- Sjögren's syndrome
- Systemic sclerosis
- Mixed CTD
- Antiphospholipid syndrome
- Giant cell arteritis
- Takayasu's arteritis
- Granulomatosis with polyangiitis
- Osteoporosis
- Dermatomyositis
- Multiple sclerosis
- Crohn's & ulcerative colitis
- Thyroid eye disease
The kind of specialty care that's harder to find than it should be.
Individualized infusions, in calm private bays.
Receive your treatment in a thoughtfully designed suite — not a hospital ward. We administer biologic infusions for rheumatic disease, iron infusions for chronic-illness anemia, and immune-supporting vitamin injections.
- Biologic infusionsActemra · Benlysta · Cimzia · Cosentyx · Krystexxa · Orencia · Prolia · Reclast · Remicade · Rituximab · Saphnelo · Simponi Aria
- Iron infusionsFor anemia related to chronic illness
- Vitamin injectionsImmune support and energy
Real care, measurable in time and trust.
Three clinicians. Decades of combined expertise.
Dr. Robinder Dhillon, M.D.
Dr. Robinder Dhillon, MD has been part of Sierra Rheumatology's team since 2018. She is board-certified in both Internal Medicine and Rheumatology, and has dedicated more than two decades to clinical care and research across five countries and over twenty hospitals.
Rosemarie Co, NP
Rosemarie Co is a Family Nurse Practitioner who brings 20 years of critical-care nursing experience to her role at Sierra Rheumatology. She is licensed as a Family Practitioner and double-certified through both the American Nurses Credentialing Center (ANCC) and the American Association of Nurse Practitioners (AANP).
Manpreet Sandhu, NP
Manpreet Sandhu is a Family Nurse Practitioner whose path into advanced practice was shaped by years at the bedside. She earned her Bachelor of Science in Nursing in India, where she also worked as a Registered Nurse and clinical instructor — educating the next generation of nurses.
Three steps to your first visit.
We make becoming a patient straightforward. Here's how it works.
The kind of care you'd recommend.
"Dr. Dhillon listened more in one visit than my previous specialist did in a year. I finally have a plan that works."
"The infusion suite is private and quiet. Staff knew my chart, my chair preference, and my schedule."
"Telehealth follow-ups have been seamless. No more juggling traffic just to confirm labs."
Let's get you to a clearer diagnosis — and a calmer plan.
Whether you're newly referred or seeking a second opinion, we'd be glad to help. Same-week new-patient appointments often available.