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Unformatted text preview: Medical coders in inpatient facilities began the coding process once the patient is discharged. Inpatient diagnosis coding is performed using ICD-9-CM volumes 1 and 2; volume 3 is used to code procedures during a patients stay. The patients general reason for admission is the principal diagnosis. The principal diagnosis must always be listed first in accordance to hospital inpatient rules. For example, inpatient principle diagnosis: diverticulosis of the small intestine (562.00); inpatient admitting diagnosis: probable acute appendicitis (540). In outpatient facilities however when a medical coder is coding a diagnosis, the primary diagnosis is the first code listed and is the general reason for seeing the physician. Although inpatient coding and outpatient coding are different it is still very important for the coders to code all procedures correctly for reimbursement....
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- Fall '11