Explain the concept of 'overcoding' or upcoding in risk adjustment.

• A. Overcoding/upcoding involves documenting or claiming diagnoses to inflate HCCs beyond what documentation supports, risking audits and compliance issues.
• B. Overcoding means coding only primary diagnoses.
• C. Upcoding means coding fewer diagnoses than present to increase scores.
• D. Overcoding is when you code non-medical attributes.

Answer: (A)

Overcoding or upcoding in risk adjustment means documenting or claiming diagnoses that aren’t supported by the patient’s chart in order to inflate the number or severity of Hierarchical Condition Categories (HCCs). Since risk scores are built from the diagnosed conditions mapped to HCCs, adding more or more severe conditions raises the calculated risk and, in turn, adjustments or payments.

This is inappropriate and risky because it misrepresents a patient’s true health status and can trigger payer audits, recoupment of funds, penalties, or even fraud investigations. Accurate coding relies on documentation that truly supports each diagnosed condition and its severity; upcoding violates that standard and undermines the integrity of the risk adjustment system.

In contrast, correctly coded records reflect only what is documented and supported by clinical evidence. The other described practices—coding only the primary diagnosis, coding fewer diagnoses than present, or coding non-medical attributes—do not describe inflating HCCs, and thus do not capture the concept of overcoding.