Final answer:
The ICD-10 code for a diagnosis of acute appendicitis with subsequent open appendectomy is K35.80, which matches the provided patient scenario.
Step-by-step explanation:
The ICD-10 code for a patient admitted to the hospital with symptoms leading to a diagnosis of acute appendicitis and subsequent removal of the appendix via an open approach is K35.80. This code is specific for acute appendicitis without mention of peritonitis, which fits the scenario described where the patient presents with right lower quadrant pain, nausea, vomiting, and low-grade fever. Proper diagnosis and communication using ICD-10 codes are crucial for accurate record-keeping and treatment planning. Appendicitis is a common condition characterized by infection and inflammation of the appendix and can become life-threatening if not treated promptly. The removal of the appendix, known as an appendectomy, is the standard treatment to prevent further complications.