Final answer:
A specific ICD-10 code cannot be determined for RUQ rebound abdominal tenderness without a definitive diagnosis. The code for unspecified abdominal pain, R10.9, can be used when a more specific diagnosis is not available.
Step-by-step explanation:
The ICD-10 code for a patient presenting with Right Upper Quadrant (RUQ) rebound abdominal tenderness would depend on the underlying cause, which might not be clearly stated in the question. However, the term 'rebound tenderness' is commonly associated with appendicitis, which is found predominantly in the lower right quadrant. In the absence of additional information providing a definitive diagnosis, it would be inappropriate to assign a specific ICD-10 code based solely on the symptom of RUQ rebound tenderness. Diagnosing conditions like appendicitis often requires a review of the patient's full clinical presentation, including history, physical examination, and possibly imaging or laboratory results. One common ICD-10 code for unspecified abdominal pain is R10.9, which could be used in cases where a more specific diagnosis is not yet determined.