The ICD-9-CM Coding Handbook helps coders understand the principles behind the classification system. The publication’s content reflects new coding guidelines and presents examples in clear, ...
We examined the validity of ICD-9-CM diagnosis codes for the identification of hyponatremia in an outpatient managed care population using data from the IHCIS National Managed Care Benchmark Database.
This study determined that ICD-9 codes 433.X1, 434.XX, and V12.54 had positive predictive values >90%, and may be used to focus care on stroke patients. A total of 4689 patients with 10,376 unique ...
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