BOARD CERTIFICATION
1982 American Board of Rheumatology
1980 American Board of Internal Medicine

PROFESSIONAL ORGANIZATIONS
2012 Assessment of SpondyloArthritis international Society (ASAS)
2009 The Rheumatology Education Group (TREG)
2006 International Myopain Society
2005 Consortium of Rheumatology Researchers of North America (CORRONA) (Executive board, scientific steering committee, director – psoriatic arthritis and spondyloarthritis arm of registry)
2004 Spondyloarthritis Research and Therapy Network (SPARTAN)
2003 Outcome Measures in Rheumatology Clinical Trials (OMERACT)
(Steering committee; co-chair psoriatic arthritis, chronic pain/fibromyalgia, single joint assessment working groups; member biomarker working group)
2003 Group for Research and Assessment of Psoriasis and Psoriatic Arthritis (GRAPPA) (Founder and immediate past president)
1996 American Society of Bone & Mineral Research
1982 King County Medical Society
1982 American College of Rheumatology
1978 American College of Physicians