In 2006, the CDC Arthritis Program finalized a case definition for ongoing surveillance of pediatric arthritis and other rheumatologic conditions (SPARC), using the current ICD-9-CM diagnostically based data systems.

Reactive arthritis: 099.3
Behcet's syndrome: 136.1
Gout: 274
Amyloidosis (includes Familial Mediterranean Fever): 277.3
Allergic purpura / Henoch Schonlein purpura: 287.0
Rheumatic fever without heart involvement: 390
Rheumatic fever with heart involvement: 391
Cerebral arteritis: 437.4
Raynaud's syndrome: 443.0
Polyarteritis nodosa and allied conditions: 446
Arteritis, unspecified: 447.6
Erythema Nodosum: 695.2
Psoriatic arthropathy: 696.0
Linear scleroderma / Circumscribed scleroderma / Morphea: 701.0
Diffuse diseases of connective tissue: 710
Arthropathy associated with infections: 711
Crystal arthropathies: 712
Arthropathy associated with other disorders classified elsewhere: 713
Rheumatoid arthritis and other inflammatory polyarthropathies: 714
Osteoarthritis and allied disorders: 715
Other and unspecified arthropathies: 716
Villonodular synovitis: 719.2
Palindromic rheumatism: 719.3
Ankylosing spondylitis and other inflammatory spondylopathies: 720
Tenosynovitis: 727.0
Rheumatism, unspecified and fibrositis: 729. 0
Myalgia and myositis, unspecified: 729.1