Final answer:
The 'And' note in medical coding indicates that two codes should be used when both conditions are present, showing they are not mutually exclusive and can be coded concurrently.
Step-by-step explanation:
The note that means two codes are applied when both conditions are present is option A) 'And'. In coding and classification systems used in medicine, such as the International Classification of Diseases (ICD), an 'And' note means that if a patient has both conditions described, both codes should be used. The 'And' condition denotes that the conditions are not mutually exclusive and can be coded concurrently.
For example, in the context of ICD-10 coding, if a patient has both pneumonia and chronic obstructive pulmonary disease (COPD), and there's an 'And' note, both conditions will be coded separately.