ICD-10-CM 2027
ICD-10 code for chronic nasopharyngitis
From the official ICD-10-CM alphabetic index entry “Nasopharyngitis (acute) (infective) (streptococcal) (subacute) › chronic (suppurative) (ulcerative)”. Page updated September 29, 2026.
About coding chronic nasopharyngitis
The ICD-10-CM code for chronic nasopharyngitis is J31.1 (Chronic nasopharyngitis).
Within J31 (chronic rhinitis, nasopharyngitis and pharyngitis), J31.1 is specifically for chronic nasopharyngitis. Related codes cover rhinitis (J31.0) and pharyngitis (J31.2).
The conditions in its Excludes2 note aren't part of J31.1, but may be coded alongside it if the patient has both: acute nasopharyngitis (J00).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
Common questions about chronic nasopharyngitis ICD-10 codes
What is the ICD-10 code for chronic nasopharyngitis?
- J31.1 — Chronic nasopharyngitis.
Is J31.1 billable?
- Yes. J31.1 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can J31.1 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict J31.1 as a principal diagnosis.
Is J31.1 a CC or MCC?
- No. J31.1 is neither a CC nor an MCC under MS-DRG v44.0.