Print Departments and specialties Mayo Clinic has one of the largest and most experienced practices in the United States, with campuses in Arizona, Florida and Minnesota. Staff skilled in dozens of specialties work together to ensure quality care and successful recovery. Departments that treat this condition Bone Marrow Transplant Program Hematology Rheumatology Doctors who treat this condition Edit search filters close Narrow your search By location Rochester, MN Phoenix/Scottsdale, AZ By last name There are no doctors whose last name begins with the letter A A There are no doctors whose last name begins with the letter B B There are no doctors whose last name begins with the letter C C There are no doctors whose last name begins with the letter D D There are no doctors whose last name begins with the letter E E There are no doctors whose last name begins with the letter F F There are no doctors whose last name begins with the letter G G There are no doctors whose last name begins with the letter H H There are no doctors whose last name begins with the letter I I There are no doctors whose last name begins with the letter J J Find a doctor whose last name begins with the letter K K There are no doctors whose last name begins with the letter L L Find a doctor whose last name begins with the letter M M There are no doctors whose last name begins with the letter N N There are no doctors whose last name begins with the letter O O Find a doctor whose last name begins with the letter P P There are no doctors whose last name begins with the letter Q Q There are no doctors whose last name begins with the letter R R Find a doctor whose last name begins with the letter S S There are no doctors whose last name begins with the letter T T There are no doctors whose last name begins with the letter U U There are no doctors whose last name begins with the letter V V Find a doctor whose last name begins with the letter W W There are no doctors whose last name begins with the letter X X There are no doctors whose last name begins with the letter Y Y There are no doctors whose last name begins with the letter Z Z Reset all filters Search Tips Use quotes for phrases. Even if there are no auto-suggestions within the search field, hit "Search" anyway, as you may still get results. Displaying 1-6 out of 6 doctors available Matthew J. Koster, M.D. Internist Rheumatologist Rochester, MN Areas of focus: Ultrasound, Vasculitis, Henoch-Schonlein purpura, Giant cell arteritis, Granulomatosis with polyangiitis, Takayasu's ar...teritis, Churg-Strauss syndrome, IgG4-related disease, Cryoglobulinemic vasculitis, VEXAS syndrome, Polyarteritis nodosa, Microscopic polyangiitis Show more areas of focus for Matthew J. Koster, M.D. Yael N. Kusne, M.D., Ph.D. Hematologist Phoenix, AZ Areas of focus: Myelodysplastic syndromes, VEXAS syndrome, Bone marrow failure syndromes, Myeloproliferative disorders Abhishek A. Mangaonkar, M.B.B.S. Oncologist Hematologist Rochester, MN Areas of focus: Bone marrow transplant, Myelodysplastic syndromes, Leukemia, VEXAS syndrome, Bone marrow failure syndromes, Myeloprolif...erative disorders Show more areas of focus for Abhishek A. Mangaonkar, M.B.B.S. Mrinal S. Patnaik, MBBS Internist Oncologist Hematologist Rochester, MN Areas of focus: Allogeneic stem cell transplant, Acute lymphocytic leukemia, Myelodysplastic syndromes, Acute myelogenous leukemia, Chr...onic myelogenous leukemia, Aplastic anemia, Dyskeratosis congenita, Chronic myelomonocytic leukemia, VEXAS syndrome, Myeloproliferative disorders, Fanconi anemia, Diamond-Blackfan anemia Show more areas of focus for Mrinal S. Patnaik, MBBS Megan M. Sullivan, M.D. Rheumatologist Phoenix, AZ Areas of focus: Joint injection, Henoch-Schonlein purpura, Polymyalgia rheumatica, Giant cell arteritis, Granulomatosis with polyangiit...is, Churg-Strauss syndrome, VEXAS syndrome, Polyarteritis nodosa, Microscopic polyangiitis Show more areas of focus for Megan M. Sullivan, M.D. Kenneth J. Warrington, M.D. Internist Rheumatologist Rochester, MN Areas of focus: Ultrasound-guided injection, Vasculitis, Henoch-Schonlein purpura, Giant cell arteritis, Granulomatosis with polyangiit...is, Takayasu's arteritis, Churg-Strauss syndrome, Aortitis, Cryoglobulinemic vasculitis, VEXAS syndrome, Urticarial vasculitis, Rheumatoid vasculitis, Polyarteritis nodosa, Microscopic polyangiitis Show more areas of focus for Kenneth J. Warrington, M.D. Research Profiles Edit search filters close Narrow your search By location Arizona Florida Minnesota View all View all physicians • All Locations Koster, Matthew J. M.D. Minnesota By Mayo Clinic Staff Request an appointment Diagnosis & treatment Oct. 14, 2025 Print Related Associated Procedures Bone marrow transplant Chemotherapy Genetic testing VEXAS syndromeSymptoms&causesDiagnosis&treatmentDoctors&departments Research: It's all about patients Show transcript for video Research: It's all about patients [MUSIC PLAYING] Joseph Sirven, M.D., Professor of Neurology, Mayo Clinic: Mayo's mission is about the patient. The patient comes first. So the mission and research here is to advance how we can best help the patient, how to make sure the patient comes first in care. So in many ways, it's a cycle. It can start with as simple as an idea worked on in a laboratory, brought to the patient bedside, and if everything goes right — and let's say it's helpful or beneficial — then brought on as a standard approach. And I think that is one of the unique characteristics of Mayo's approach to research — that patient-centeredness — that really helps to put it in its own spotlight. CON-20584250 Diseases & Conditions VEXAS syndrome