ICD-10-CM
ICD-10 code for Cellulitis (diffuse) (phlegmonous) (septic) (suppurative) peritonsillar: J36
The ICD-10-CM index points "Cellulitis (diffuse) (phlegmonous) (septic) (suppurative) peritonsillar" to J36, Peritonsillar abscess. J36 is a billable code.
Source: CDC ICD-10-CM FY2027 Alphabetic Index file dated June 16, 2026. Publisher page
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Use additional code
The CDC tabular list says to add the code named here after this one when it applies.
Use additional code (B95-B97) to identify infectious agent.
Excludes1
Excludes1 means these codes are not reported together.
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Questions
What is the ICD-10 code for Cellulitis (diffuse) (phlegmonous) (septic) (suppurative) peritonsillar?
The ICD-10-CM index points "Cellulitis (diffuse) (phlegmonous) (septic) (suppurative) peritonsillar" to J36, Peritonsillar abscess. J36 is a billable code.
Is J36 billable?
Yes. J36 is a billable code in the FY2027 ICD-10-CM file. Use a more specific code when the record documents one.
What documentation notes apply to J36?
The CDC tabular list gives 4 Excludes1 notes (not coded together), 1 "use additional code" note for J36 and the categories above it. They are listed on this page.
What chapter is J36 in?
Chapter 10. Diseases of the respiratory system.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.