Frequent asked questions
Who is part of the Rheumatologist OnCall team?
The Rheumatologist OnCall team includes Dr. Diana Girnita, MD, PhD, FACR, Dr. Vishnuteja Devalla, MD, Dr. Mirela Titianu, MD, Darren Joy, RPh, and Pearl Bonsucan, Patient Care Coordinator. Together, the team supports patients with arthritis, autoimmune conditions, menopause-related concerns, weight management, lifestyle medicine, and patient care coordination.
Who is Dr. Diana Girnita, MD, PhD, FACR?
Dr. Diana Girnita is the Founder and CEO of Rheumatologist OnCall. She is board certified in Internal Medicine and Rheumatology and is dedicated to making arthritis and autoimmune care more accessible through telehealth and direct-pay specialty care.
What is Dr. Diana Girnita known for?
Dr. Girnita is known for her work in arthritis and autoimmune care, telehealth rheumatology, nutrition-focused support, direct-pay medicine, patient education, and whole-body rheumatology. Her educational content has reached millions of views, and her work has been featured in major medical and media outlets.
Who is Dr. Vishnuteja Devalla, MD?
Dr. Vishnuteja Devalla is a board-certified rheumatologist at Rheumatologist OnCall. He is an expert in treating arthritis and autoimmune diseases and has a special interest in gut health, chronic inflammation, and complex rheumatology care.
What is Dr. Devalla’s training background?
Dr. Devalla completed Ivy League rheumatology training at Dartmouth-Hitchcock Medical Center. He is board certified in Rheumatology and is licensed in multiple U.S. states, allowing him to support eligible patients through virtual rheumatology consultations.
Who is Dr. Mirela Titianu, MD?
Dr. Mirela Titianu is a physician at Rheumatologist OnCall who is board certified in Internal Medicine, Obesity Medicine, and Lifestyle Medicine. She is also a Menopause Society Certified Practitioner and a Certified Nutrition Coach through NASM.
What does Dr. Mirela Titianu help patients with?
Dr. Titianu helps patients with menopause, perimenopause, hormone-related symptoms, obesity medicine, lifestyle medicine, sustainable weight loss, nutrition, and improved health outcomes for people living with arthritis and autoimmune diseases.
Who is Darren Joy, RPh?
Darren Joy, RPh, is the Practice Manager and Medical Assistant at Rheumatologist OnCall. The page describes Darren as bringing warmth, efficiency, organization, and genuine care to the patient experience and daily practice operations.
Who is Pearl Bonsucan?
Pearl Bonsucan is the Patient Care Coordinator at Rheumatologist OnCall. Her role is to listen to patients, understand their story, and help them feel supported while navigating autoimmune and arthritis-related health concerns.
What makes the Rheumatologist OnCall team different?
The team focuses on personalized, accessible, direct-pay rheumatology care. The page emphasizes that patients are treated as people, not diseases, with direct physician communication, transparent pricing, telehealth access, and support that blends medical treatment with nutrition, mindfulness, and physical activity.
Does Rheumatologist OnCall offer telehealth visits?
Yes. Rheumatologist OnCall provides in-person and telehealth visits across its service area. The page highlights telehealth as part of the practice’s mission to make arthritis and autoimmune care more accessible when patients need it.
Where is Rheumatologist OnCall located?
Rheumatologist OnCall is located at 19712 MacArthur Blvd, Suite 100, Irvine, CA 92612. The practice also provides telehealth care for eligible patients depending on location and state availability.
Has Rheumatologist OnCall been featured in the media?
Yes. The page states that Rheumatologist OnCall and Dr. Diana Girnita have been featured in outlets such as The New York Times, NPR, Medscape, KevinMD, and other medical and health platforms.
Has Dr. Diana Girnita written books?
Yes. The page lists several books and resources by Dr. Girnita, including “Thriving with Rheumatoid Arthritis,” “The Complete Gout Management and Nutrition Guide,” and the “Rheumatoid Arthritis Journal.”
How can I book an appointment with the Rheumatologist OnCall team?
Patients can take the first step by using the booking option on the website or by calling the appointment phone number listed on the page. The team provides expert care for arthritis, autoimmune conditions, and related health concerns through in-person and virtual consultations.




















