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Table 2The top 100 principal diagnoses and their associated principal procedures: HCUP Nationwide Inpatient Sample, 1996Number of discharges Length of stay ChargesTop 100 ranked diagnoses with top 5 procedures ranked below[CCS category in brackets]1As a percent of As a percentdischarges w/ of all Percent Mean Median Mean MedianTotal2this diagnosis3discharges died4(S.E.)4(S.E.)4(S.E.)4(S.E.)D13. Nonspecific chest pain [102] 514,895 100.00 1.48 0.07 2.0 1.1 $5,239 $4,292Number of procedures with this diagnosis = 179 (0.02) (0.02) ( $77) ( $71)p1. No Procedure Listed [.] 337,078 65.47 0.97 0.04 1.8 1.0 $4,278 $3,702(0.02) (0.01) ( $61) ( $60)p2. Diagnostic cardiac catheterization, coronary arteriography [47] 85,330 16.57 0.24 0.01 2.4 1.5 $8,583 $7,812(0.03) (0.03) ( $192) ( $175)p3. Cardiac stress tests [201] 29,975 5.82 0.09 0.00 1.8 1.0 $4,910 $4,257(0.06) (0.04) ( $186) ( $209)p4. Diagnostic ultrasound of heart (echocardiogram) [193] 14,392 2.80 0.04 0.05 2.4 1.5 $5,599 $4,851(0.16) (0.11) ( $232) ( $224)62p5. Electrographic cardiac monitoring [203] 11,724 2.28 0.03 0.04 1.6 0.8 $3,445 $2,942(0.07) (0.06) ( $187) ( $225)D14. Fluid and electrolyte disorders [55] 492,750 100.00 1.41 3.00 4.5 2.6 $6,596 $4,228Number of procedures with this diagnosis = 208 (0.05) (0.03) ( $94) ( $52)p1. No Procedure Listed [.] 363,640 73.80 1.04 2.15 3.5 2.2 $4,755 $3,548(0.03) (0.02) ( $56) ( $46)p2. Upper gastrointestinal endoscopy, biopsy [70] 15,802 3.21 0.05 2.55 6.8 4.9 $10,902 $8,321(0.11) (0.09) ( $220) ( $177)p3. Gastrostomy, temporary and permanent [71] 8,316 1.69 0.02 6.75 10.5 7.7 $14,500 $10,655(0.30) (0.18) ( $460) ( $301)p4. Other therapeutic procedures [231] 8,020 1.63 0.02 3.95 4.4 2.5 $6,087 $3,616(0.40) (0.13) ( $732) ( $405)p5. Computerized axial tomography (CT) scan head [177] 7,358 1.49 0.02 2.99 6.0 3.8 $8,069 $6,004(0.25) (0.14) ( $338) ( $253)Source: AHCPR, Center for Organization and Delivery Studies, Healthcare Cost and Utilization Project (HCUP).