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Infectious mononucleosis
Chapter 1: Certain infectious and parasitic diseases
Coding Guidance
B27 should not be used for reimbursement purposes as there are more specific codes below it that contain a greater level of detail. See Related Codes to drill down to more specific billable codes for appropriate reimbursement.
From parent codes: A00-B99 (Chapter 1)
Conditions included in this code from parent codes.
Excludes1 means 'NOT CODED HERE!' An Excludes1 note indicates mutually exclusive codes: two conditions that cannot be reported together.
Excludes2 means 'NOT INCLUDED HERE!' An Excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time.
The 'use additional code' note instructs that a secondary code should be added to provide more detail.
More specific codes for B27