GRAPPA is organized exclusively for non-profit, educational, and scientific purposes, specifically to facilitate sharing of information related to psoriasis and psoriatic arthritis, networking among different medical disciplines that see psoriasis and psoriatic arthritis patients, and to enhance research, diagnosis and treatment of psoriasis and psoriatic arthritis.
What's New at GRAPPA
Stay informed on the latest GRAPPA happenings from events to member news.
2026 Annual Meeting - Registration Opens Soon
We are looking forward to the GRAPPA Annual Meeting 2026, to be held in Lisbon, Portugal. This premier international meeting brings together leading experts in psoriatic disease for cutting-edge science, collaboration, and education. Registration opens March 1st.
GRAPPA Ultrasound Workshop at the Annual Meeting
Join us for a focused, case-based workshop designed to strengthen your understanding of entheseal ultrasound and its application in psoriatic arthritis (PsA).
GRAPPA Annual Meeting 2025 On Demand
Access all event content from Bogotá, including Morning Concurrent Sessions, Plenary Sessions, and Trainee Abstracts.
"We are united in our leadership to bring the most passionate rheumatologists, dermatologists, clinical scientists, patient representatives, and industry partners together to make a difference for those living with psoriasis and psoriatic arthritis."
Artie Kavanaugh, MD, & Joseph Merola, MD, MMSc - GRAPPA Co-Presidents
Be a part of something profound.
GRAPPA is an amazing network of people interested in psoriasis and PsA.
Through your involvement you can share ideas, collaborate on research and lead projects aimed to improve the lives of people living with psoriatic disease.
What makes GRAPPA so special to me? What really is unique to me when thinking about GRAPPA in comparison to other similar organisations is - besides the international scientific exchange - the interdisciplinary collaboration between dermatologist and rheumatologist aiming to improve the knowledge about psoriatic diseases, ultimately resulting in optimizing the care of our patients!
Fabian Proft
Rheumatologist and GRAPPA Steering Committee Member
GRAPPA is an incredibly welcoming and inclusive organisation. From the moment I attended my first meeting in 2009 I felt encouraged to participate and contribute and this ethos remains very much alive in all the activities from the annual meeting to young-GRAPPA.
William Tillett
Rheumatologist and GRAPPA Steering Committee Member
GRAPPA is one of the most inclusive organisations that I know.
Professor Adewale Adebajo
MBE, Rheumatologist and GRAPPA Steering Committee Member
It has been fascinating to be a part of GRAPPA, and see how much progress has been made in the ability to provide therapeutic options with patients with Psoriatic Arthritis. GRAPPA is a dynamic and collegial community, where we all learn from each other
Arthur Kavanaugh
M.D., Rheumatologist and GRAPPA Co-Vice President
GRAPPA celebrates 20 years and growing in 2023. In that 20 years, GRAPPA has become the go-to organisation for those interested in Psoriatic Disease. With the involvement of all the key players (rheumatologists, dermatologists, basic scientists, patient and industry partners), the strengths of the GRAPPA educational and research programmes are truly impressive. As GRAPPA co-president, I really enjoy both the social and academic contacts and stimulus which GRAPPA provides.
Oliver FitzGerald
Rheumatologist, Co President
GRAPPA is an amazing network of people interested in psoriasis and PsA. Through my involvement, I have been able to share ideas, collaborate on research and lead projects aiming to improve the lives of people living with psoriatic disease.
Laura Coates
Clinician Scientist, Steering Committee Member
About Us
Originally inspired by the Assessment in Ankylosing Spondylitis Working Group (ASAS), GRAPPA was formed in 2003. GRAPPA has pulled together many different groups, including preeminent researchers and thought-leaders in psoriatic arthritis (PsA) and psoriasis (PsO).
In 2015 a team of Patient Research Partners was added to round out our perspective. The idea was to form a consortium of rheumatologists, dermatologists, radiologists, epidemiologists, patient representatives and others who would like to contribute to the field of PsA. At the inaugural meeting in 2003, a consensus exercise started the group toward prioritizing domains of inquiry in PsA and PsO.
Subsequent annual meetings have focused on identifying and initiating research projects, advancing standardized criteria for psoriatic arthritis registries, and developing treatment guidelines for PsA. GRAPPA is a 501(c)3 nonprofit organization with offices in Seattle, WA and members from around the world.
Wherever the art of medicine is loved, there is also a love of humanity. Hippocrates
GRAPPA Corporate Members
Corporate members support GRAPPA's mission by contributing to ongoing operations and the multiple initiatives of our association, such as research and education.
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