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Append ix I GENERAL COMPARISON OF ASSESSMENTS OF THE: RELIAB ILITY OF MEDICARE RECORDS MAINTAINED BY THE HEALTH CARE FINANCING ADMINISTRATION AND HOSPITAL DISCHARGE ABSTRACTS COMPILED BY PRIVATE ABSTRACT SERVICES WE IGHTED PERCENTS ~ Medic are Correct data source where a No record or discrepancy exists Data discrep- private IOM items ancy abstract abstract Either Neither Total . HCFA's Medicare records . Diagnoses Four-digit 57.2 2.3 35.7 0.2 4.6 100.0 Three-digit 61.9 1. 9 31.6 0.2 4.4 100.0 All procedures 78. 9 1. 7 17.3 0.4 1. 7 100.0 Procedures coded 56.6 5.2 34.7 2.3 1.2 100.0 No procedures coded 89. 7 - 8.9 1.4 - 100.0 Private abstract service Medicare records Diagnoses Four-digit 64.4 1. 6 23. 3 0. 3 10.4 100. 0 Three-digit 73.9 0.9 15.2 0.2 9.8 100.0 - All procedures 72.5 2.6 7. 7 0. 1 17. 1 100.0 Procedures coded 64.8 3.9 9.1 0.2 22.Q 100.0 No procedures - coded 86.9 - 4. 9 - 8.2 100.0 Private abstract service Medicare Medicaid records - Diagnoses Four-digit 65.2 1.6 22.2 0.2 10. 7 100. 0 Three-digit 74.0 0. 9 14.8 0.2 10.0 100.0 All procedures 73.2 2.5 7.8 0.2 16.3 100.0 Procedures coded 66.0 3.8 9.3 0.2 20.7 100.0 No procedures coded 86. 7 - 5.3 0. 1 8.0 100.0 :125
