FA21 Psoriatic arthritis International Classification of Diseases for Mortality and Morbidity Statistics, 11th Revision, v2024-01 Psoriatic arthritis, a member of the spondyloarthritis family, is defined as an inflammatory arthropathy associated with psoriasis that is usually rheumatic factor negative. It is characterised by various clinical manifestations, including symmetric polyarthritis, asymmetric oligoarthritis or polyarthritis, spinal inflammation similar to ankylosing spondylitis, peripheral enthesitis, anterior chest wall involvement, distal interphalangeal arthritis of the hands and feet, dactylitis (sausage digit or toe), arthritis mutilans and onycho-pachydermo-periostitis. The CASPAR has high sensitivity and specificity.
exclusions sections/codes in this section (FA21-FA21) postcoordination Add Stem and/or Extension codes to form a cluster code which adds detail to the condition.
Specific anatomy - multiple selections are allowed [select] XA6UT2 Joints of the head – XA65F2 Atlantooccipital joint – XA7EM1 Atlantoaxial joint – XA2SM2 Temporomandibular joint XA2NG8 Joints of the thorax – XA83N6 Sternocostal joint – XA30Q4 Costochondral joint – XA0892 Costovertebral joint – XA7AR2 Costotransverse joint – XA0ZE4 Facet joint XA1TL5 Joints of the pelvis – XA5A04 Lumbosacral joint – XA70B6 Sacrococcygeal joint – XA3T32 Sacroiliac joint XA4U90 Joints of the upper extremity – XA05J7 Shoulder joint –– XA49P8 Glenohumeral joint –– XA69U6 Acromioclavicular joint –– XA0CH1 Sternoclavicular joint – XA69H4 Elbow joint –– XA3G42 Proximal radioulnar joint –– XA46J3 Humeroulnar joint –– XA53P1 Humeroradial joint – XA64C3 Wrist joint –– XA78S6 Distal radioulnar joint –– XA0P38 Radiocarpal joint – XA62V5 Joints of the hand –– XA3MB4 Carpal joint ––– XA0E90 Intercarpal joint ––– XA4AS7 Midcarpal joint ––– XA0JX0 Carpometacarpal joint –– XA9DN6 Intermetacarpal joint –– XA86T5 Metacarpophalangeal joint ––– XA3M83 First metacarpophalangeal joint ––– XA9YH1 Second metacarpophalangeal joint ––– XA6HB0 Third metacarpophalangeal joint ––– XA7XA8 Fourth metacarpophalangeal joint ––– XA7KA0 Fifth metacarpophalangeal joint –– XA9291 Interphalangeal joint of the hand ––– XA6L43 Interphalangeal joint of the thumb ––– XA1307 Proximal interphalangeal joint of finger –––– XA1DN6 Proximal interphalangeal joint of index finger –––– XA3NW6 Proximal interphalangeal joint of middle finger –––– XA0BF5 Proximal interphalangeal joint of ring finger –––– XA4175 Proximal interphalangeal joint of little finger ––– XA4U75 Distal interphalangeal joint of finger –––– XA6KB0 Distal interphalangeal joint of index finger –––– XA15C8 Distal interphalangeal joint of middle finger –––– XA0LT5 Distal interphalangeal joint of ring finger –––– XA1928 Distal interphalangeal joint of little finger XA7L41 Joints of lower extremity – XA4XS4 Hip joint – XA8RL1 Knee joint –– XA0LC4 Tibiofemoral joint –– XA0VJ4 Patellofemoral joint –– XA0LG3 Proximal tibiofibular joint –– XA8VV2 Semilunar cartilage – XA27P3 Ankle joint –– XA8MM7 Talocrural joint –– XA2K81 Distal tibiofibular joint –– XA7SZ8 Subtalar joint – XA22T0 Joint of the foot –– XA2YS1 Intertarsal joint ––– XA4JJ1 Calcaneocuboid joint ––– XA0WY5 Talocalcaneonavicular joint ––– XA6NT7 Cuneonavicular joint ––– XA1N77 Cuboideonavicular joint ––– XA9SD1 Intercuneiform joint ––– XA2FA3 Cuneocuboid joint –– XA2MY1 Tarsometatarsal joint –– XA6FF3 Intermetatarsal joint –– XA8XU1 Metatarsophalangeal joint ––– XA7NJ7 First metatarsophalangeal joint ––– XA58K5 Second metatarsophalangeal joint ––– XA2792 Third metatarsophalangeal joint ––– XA7QC6 Fourth metatarsophalangeal joint ––– XA5A23 Fifth metatarsophalangeal joint –– XA04T7 Interphalangeal joint of the foot ––– XA87P9 Interphalangeal joint of great toe ––– XA5573 Proximal interphalangeal joint of the foot –––– XA56K9 Proximal interphalangeal joint of second toe –––– XA2QY2 Proximal interphalangeal joint of third toe –––– XA2R87 Proximal interphalangeal joint of fourth toe –––– XA1LM0 Proximal interphalangeal joint of fifth toe ––– XA0RK3 Distal interphalangeal joint of the foot –––– XA8UM5 Distal interphalangeal joint of second toe –––– XA43F0 Distal interphalangeal joint of third toe –––– XA8NU9 Distal interphalangeal joint of fourth toe –––– XA39U1 Distal interphalangeal joint of fifth toe –– XA9Z55 Transverse tarsal joint XA4EJ6 Multiple Joints – XA1CK9 Oligoarticular – XA3FU7 Polyarticular –– XA02P3 Multiple large joints only –– XA2SK7 Multiple small joints only –– XA3BZ3 Both large and small joints –– XA5X22 Large joints only with cervical spine or temporomandibular involvement XA4BF0 Monoarticular Has manifestation - multiple selections are allowed [select] MG30.30 Chronic secondary musculoskeletal pain from persistent inflammation
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