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Petros Efthimiou, MD, FACR

Specialty in Rheumatology

Petros Efthimiou is a Board Certified Specialist in Rheumatology at the rank of Clinical Professor of Medicine & Rheumatology in New York City.

A summa cum laude graduate of the University of Ioannina Medical School in Greece, Dr. Efthimiou became a Research Scholar at Northwestern University College of Medicine in Chicago, Illinois. He then completed his Internal Medicine Residency at Brown University in Providence, Rhode Island, while his Rheumatology Fellowship took place at the Hospital for Special Surgery and New York Presbyterian/Cornell Campus.

Dr. Efthimiou has expertise in the treatment of autoimmune disorders including Rheumatoid Arthritis, Psoriatic arthritis, gout, osteoarthritis, myositis, SLE-lupus, Sjogren’s syndrome, Vasculitis, Pulmonary Hypertension, Scleroderma, Osteoporosis, Auto-inflammatory Syndromes and Adult Still’s Disease. Dr. Efthimiou has published extensively in peer-reviewed journals and medical textbooks and has served as Clinical Investigator in multiple, international, randomized controlled trials. He has served as an ad hoc reviewer and editorial board member in peer-reviewed rheumatology journals and is a frequently invited speaker in national and international medical conferences.

A 2011-20 “Castle Connolly” and “US News & World Report”, Top Doctor in Rheumatology, he was the recipient of the Patients’ Choice Award in 2012-20 and named a 2014-20 “Super Doctor” by the New York Times and “Best Doctor” by New York Magazine. He has published a medical textbook in the Auto-inflammatory Syndromes and a Rheumatology Review Textbook.

Dr Efthimiou is Board Certified in Rheumatology and Internal Medicine.

Practice names

New York Rheumatology Care, PC

Clinical Professor of Medicine, RUSM

Education and training

2001-2004 - Rheumatology Fellowship, Weill Cornell Medicine & Hospital for Special Surgery, New York, NY

1999-2001 - Internal Medicine Residency, Brown University School of Medicine, Providence, RI

1998-1999 - Internal Medicine Residency, University of Iowa School of Medicine, Iowa City, IA


New York Magazine, “Top Doctor”, Rheumatology, 2014, 2015, 2016, 2017, 2019

New York Times Magazine, “Super Doctor”, 2014-2020

US News & World Report: Top Doctors, 2011-20

Castle Connolly: Top Doctors in New York, 2011-20

Patients’s Choice ™ Award, 2012-20

Marquis’ Who is Who in Healthcare, 06/2008-current

University of Hawaii Medical School Visiting Professorship, 11/2007

Clinical Immunology Society Autoimmunity Spring School Travel Grant, 03/2004

American College of Rheumatology Slide Competition Finalist, 10/2002

North Atlantic Treaty Organization (NATO) International Medical Scholarship Recipient, 06/1997


American Board of Internal Medicine Certified: Internal Medicine & Rheumatology

Publication Highlights

Yadlapati S, Efthimiou P. “Inadequate response or intolerability to oral methotrexate: Is it optimal to switch to subcutaneous methotrexate prior to considering therapy with biologics?” Rheumatology International. 2016 May;36(5):627-33.

Yadlapati S, Efthimiou P. “Autoimmune/Inflammatory Arthritis Associated Lymphomas: Who Is at Risk?”. BioMed Research International, 2016; 2016: 8631061.

Bello AE, Perkins EL, Jay R, Efthimiou P. “Recommendations for optimizing methotrexate treatment for patients with rheumatoid arthritis” Open Access Rheumatol. 2017 Mar 31;9:67-79. doi: 10.2147/OARRR.S131668. eCollection 2017.

Yadlapati S, Efthimiou P. “IgG4-Related Disease: A Complex Under-Diagnosed Clinical Entity” Rheumatology International, 2018 Feb;38(2):169-177

Feist E, Quartier P, Fautrel B, Schneider R, Sfriso P, Efthimiou P, Cantarini L,,, Speziale. “Efficacy and safety of canakinumab in patients with Still’s disease: Exposure-response analysis of pooled SJIA data by age groups”, Clin Exp Rheumatology, 2018 Jul-Aug;36(4):668-675. Epub 2018 Mar 2

Menon S and Efthimiou P. “Tumor necrosis factor receptor associated periodic syndrome (TRAPS) in adults” Rheumatology International, 2018 Jan;38(1):3-11

Chao R, Das M, Philip C, Efthimiou P “Oxygen-Dependent Patient with Antisynthetase Syndrome Associated Interstitial Lung Disease Responds Promptly to Rituximab with Rapid Pulmonary Function Improvement” Mediterr J Rheumatol 2017; 28(3):56-59

Bottai M, Tjärnlund A, Santoni G…Efthimiou P… et al. International Myositis Classification Criteria Project consortium, the Euromyositis register and the Juvenile Dermatomyositis Cohort Biomarker Study and Repository (JDRG) (UK and Ireland) “EULAR/ACR classification criteria for adult and juvenile idiopathic inflammatory myopathies and their major subgroups: a methodology report” RMD Open. 2017 Nov 14;3(2):e000507. doi: 10.1136/rmdopen-2017-000507. eCollection 2017.

Chao R, Ivanov A, Efthimiou P.”Cardiac Magnetic Resonance Imaging of Cardiac Amyloidosis”. J Clin Rheumatol. 2019 Aug;25(5):e59-e60

Mehta BY, Ibrahim S, Briggs W, Efthimiou P. “Racial/Ethnic variations in morbidity and mortality in Adult Onset Still’s Disease: An analysis of national dataset” Semin Arthritis Rheum. 2019 Apr 25. pii: S0049-0172(19)30123-4. doi: 10.1016/j.semarthrit.2019.04.004. [Epub ahead of print]