Question: An established patient reports to the dermatologist complaining of sores on his lower back and upper abdomen. The dermatologist performs a detailed history and expanded problem focused exam, and diagnoses cutaneous abscesses of the abdominal wall and back. Notes indicate moderate medical decision making (MDM). There is also a note stating: “Meth-susceptible Staph underlying cause.” How should I report this encounter?
Alaska Subscriber
Answer: To report this encounter correctly, you’ll need a trio of ICD-10 codes along with your evaluation and management (E/M) code. On the claim, report:
Explanation: If there is an infectious agent causing the abscess, you need to include a code from B95 (Streptococcus, Staphylococcus, and Enterococcus as the cause of diseases classified elsewhere) through B97.- (Viral agents as the cause of diseases classified elsewhere) as a secondary diagnosis. This coding convention holds true when an underlying condition is causing most injuries in the ICD-10 range L00 (Staphylococcal scalded skin syndrome) through L08.- (Other local infections of skin and subcutaneous tissue).
Exception: If there isn’t an underlying infectious agent causing the abscess, don’t include a B95 through B97.- code. There is also an extensive list conditions that wouldn’t be cause to include a secondary code. These diagnoses appear at the beginning of the Tabular List for Chapter 12 of the ICD-10 manual, under the heading “Infections of the skin and subcutaneous tissue (L00-L08).”