ICD-10-CM 2027
ICD-10 code for peritonsillar cellulitis
From the official ICD-10-CM alphabetic index entry “Cellulitis (diffuse) (phlegmonous) (septic) (suppurative) › peritonsillar”. Page updated September 29, 2026.
About coding peritonsillar cellulitis
The ICD-10-CM code for peritonsillar cellulitis is J36 (Peritonsillar abscess).
Don't report J36 together with the conditions in its Excludes1 note: acute tonsillitis (J03.-), chronic tonsillitis (J35.0), retropharyngeal abscess (J39.0) and tonsillitis NOS (J03.9-).
Use an additional code (B95-B97) to identify infectious agent.
As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.
Don't confuse with (Excludes1 for J36)
Common questions about peritonsillar cellulitis ICD-10 codes
What is the ICD-10 code for peritonsillar cellulitis?
- J36 — Peritonsillar abscess.
Is J36 billable?
- Yes. J36 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can J36 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict J36 as a principal diagnosis.
Is J36 a CC or MCC?
- J36 is a CC (complication or comorbidity) under MS-DRG v44.0, unless excluded by the principal diagnosis.