Final answer:
The 'Use Additional Code' instruction in medical coding is true and requires coders to provide a secondary code for manifestations or symptoms of the primary condition being coded.
Step-by-step explanation:
The phrase 'Use Additional Code' is typically found in medical coding guidelines, such as those for the International Classification of Diseases (ICD). When a coder comes across an instruction in the ICD that states 'Use Additional Code', it means that the provided code should be accompanied by a secondary code that specifies the manifestation or symptom of the condition being coded. Therefore, the statement The Use Additional Code note instructs the coder to use an additional code to identify the manifestation that is present is A. True. Coders must be aware of this in order to accurately represent the patient's medical situation, which could affect treatment decisions and insurance claims.