For an acute care inpatient discharge, which UHDDS-aligned definition should the coder use when selecting the principal diagnosis?
Select an answer to reveal the explanation.
Short Explanation
UHDDS principal diagnosis is not “whatever paid best” or “whatever was first on the ED sheet.” It is the condition after study that mainly caused the admission. Think reason-for-stay after the workup, not the loudest billing code.
Full Explanation
Under UHDDS, the principal diagnosis for acute hospital inpatient discharges is the condition established after study to be chiefly responsible for occasioning the admission. Coders must not substitute the highest-paying diagnosis or an initial ED impression that was later ruled out. Correct principal-diagnosis selection is foundational to discharge data integrity and MS-DRG assignment.