Coding, Charge Capture, and Clinical Documentation Integrity
Domain 3: Coding, Charge Capture, and Clinical Documentation Integrity
This domain tests ICD-10-CM, CPT, HCPCS, E/M level selection, modifiers, NCCI edits, charge capture, and CDI.
Core rules
- Office E/M visits use medical decision making or total time; the 2021 and 2023 guideline changes altered history and exam requirements.
- Modifier 25: significant, separately identifiable E/M on the same day as a procedure. Modifier 59 and X{E,S,P,U} bypass NCCI procedure-to-procedure edits only when services are clinically distinct.
- NCCI PTP edits and medically unlikely edits (MUEs) are payer edits; check them before billing.
- Charge capture: every documented service should map to a charge; reconcile schedule, charges, and claims; monitor charge lag.
- CDI: query for specificity, linkage, laterality, and medical necessity; avoid leading queries.
- HCC risk adjustment: capture chronic conditions annually when documented and treated.
Worked example
A patient is seen for wart removal and also has an unrelated evaluation for new hypertension. The note supports a separate E/M and the procedure. Bill the procedure and add modifier 25 to the E/M only if the E/M is significant and separately documented. If the note only says the wart was removed and blood pressure was checked, the E/M is bundled; adding 25 is unbundling.
Traps
Using modifier 25 routinely; using 59 when an X modifier is correct; upcoding E/M; cloning documentation; missing NCCI edits; charging supplies without documentation.