For a hospital encounter involving COPD and acute respiratory failure, which is the correct reporting approach?

• A. Code COPD first, then acute respiratory failure
• B. Code acute respiratory failure only
• C. Code COPD only
• D. Code both COPD and acute respiratory failure; sequence is determined by the principal reason for admission and documentation; both conditions are reported

Answer: (D)

Inpatient coding requires capturing all conditions that affect patient care. When both COPD and acute respiratory failure are present and documented, you report both diagnoses. The order isn’t fixed by the conditions themselves but by the principal reason for admission as stated in the medical record. If the patient was admitted for a COPD exacerbation and ARF is a complication, COPD would typically be listed first and ARF second. If the documentation shows acute respiratory failure as the main reason for admission, ARF would be the principal diagnosis and COPD would be listed as a secondary diagnosis. So the correct approach is to code both conditions and sequence them according to the principal diagnosis and the documentation.