Rheumatology practices with laboratory testing facilities in their offices can offer important benefits to patients and physicians. During their care of patients with musculoskeletal and rheumatic diseases, rheumatologists may order many tests, including erythrocyte sedimentation rate, synovial fluid analysis, complete blood count, fecal occult test, and urinalysis. While the prompt receipt of test results and the capability to evaluate specimens in the office directly improves efficiency, it is important to remember that offices must be certified to perform laboratory testing, particularly high-complexity tests such as the analysis of synovial fluids.