Flank pain, left side

This code signifies discomfort or aching localized to the left flank region of the torso. Flank pain is typically experienced in the area between the lower ribs and the top of the hip bone, often indicative of issues with the kidney, ureter, or surrounding musculoskeletal structures on the left side.

Assign this code when documentation explicitly states "left flank pain" without further specification of an underlying definitive diagnosis. It is appropriate for initial encounters where the etiology of the pain is still under investigation or when the pain is a primary symptom being treated.

• Do not use if a more specific diagnosis explaining the flank pain is documented (e.g., left renal calculus).
• Ensure the laterality (left) is clearly documented; differentiate from right flank pain (R10.A1) or unspecified flank pain (R10.A0).
• This code is often used as a primary diagnosis when the patient presents with this symptom, or as a secondary diagnosis when it's a significant co-morbidity.