Miscoding as a Cause of Elevated Simple Pneumonia Mortality

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Abstract:

Background: An independent health care evaluating organization reported on the Internet that the 1996–1998 mortality rate for simple pneumonia (one of the diagnoses in diagnosis-related group [DRG] 89) was 11.06% (expected rate, 7.69%)—a rate much higher than suggested by the medical center's prospective quality surveillance. Chart review was undertaken to explain this reported higher mortality rate.

Methods: Two-hundred forty-six charts of patients (123 expired, and 123 alive at discharge) were reviewed; each chart concluded with a principal diagnosis. The differences between the originally coded principal diagnosis and the recoded principal diagnoses were examined.

Results: Application of Coding Clinic guidelines revealed that a principal diagnosis of simple pneumonia should have been coded in only 85 (34.6%) of the charts. The remaining charts should have been coded as respiratory failure (13.8%), congestive heart failure (11.4%), respiratory infections and inflammations (7.7%), and other diagnoses (32.5%). Coding occurred prior to discharge summary dictation in 48.4% of the cases. On the basis of the findings, the actual calculated mortality rate of simple pneumonia was 6.6%.

Discussion: Coding in advance of discharge summary completion and nonexplicit documentation of the principal diagnoses occurred frequently. Reasons for miscoding included failure to distinguish between principal and final diagnoses, delay in discharge summary dictation, and inadequate documentation.

Document Type: Research Article

Publication date: June 1, 2004

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  • Published monthly, The Joint Commission Journal on Quality and Patient Safety is a peer-reviewed publication dedicated to providing health professionals with the information they need to promote the quality and safety of health care. The Joint Commission Journal on Quality and Patient Safety invites original manuscripts on the development, adaptation, and/or implementation of innovative thinking, strategies, and practices in improving quality and safety in health care. Case studies, program or project reports, reports of new methodologies or new applications of methodologies, research studies on the effectiveness of improvement interventions, and commentaries on issues and practices are all considered.

    Also known as Joint Commission Journal on Quality Improvement and Joint Commission Journal on Quality and Safety
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