B27 vs J02.8
B27 (Infectious mononucleosis) compared with J02.8 (Acute pharyngitis due to other specified organisms), from the official CMS tabular data. Do not report these codes together: the official tabular list marks them Excludes1.
Can these codes be reported together?
No — do not report together. J02.8 carries an Excludes1 note covering B27: “acute pharyngitis due to infectious mononucleosis (B27.-)”
Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).
Side by side
| B27Infectious mononucleosis | J02.8Acute pharyngitis due to other specified organisms | |
|---|---|---|
| Billing status | Non-billable header | Billable |
| Classification | A00-B99 — Certain Infectious and Parasitic Diseases (A00-B99) | J00-J99 — Diseases of the Respiratory System (J00-J99) |
| Definition | Infectious mononucleosis is a non-billable ICD-10-CM category code (B27). | Acute pharyngitis due to other specified organisms is a billable ICD-10-CM diagnosis code (J02.8). |
| Includes | glandular fever monocytic angina Pfeiffer's disease | acute sore throat |
| Use additional code | — | code (B95-B97) to identify infectious agent |
Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources