J03.91 – Acute recurrent tonsillitis, unspecified
ICD-10-CM 2027 diagnosis code · Acute upper respiratory infections
ICD-10-CM code
J03.91
- Code
J03.91(claims format:J0391)- Description
- Acute recurrent tonsillitis, unspecified
- Billable
- Yes – valid for HIPAA-covered transactions
- Valid for
- Dates of service October 1, 2026 – September 30, 2027 (FY2027)
- Chapter
- 10. Diseases of the respiratory system (J00-J99)
- Block
- J00-J06 Acute upper respiratory infections
- Parent codes
- J03 › J03.9
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
J03 – Acute tonsillitis
Excludes1 (not coded here):
Excludes2 (not included here):
- chronic tonsillitis (J35.0)
J03.9 – Acute tonsillitis, unspecified
Applicable to:
- Follicular tonsillitis (acute)
- Gangrenous tonsillitis (acute)
- Infective tonsillitis (acute)
- Tonsillitis (acute) NOS
- Ulcerative tonsillitis (acute)
Excludes1 (not coded here):
Block J00-J06
Excludes1 (not coded here):
- chronic obstructive pulmonary disease with acute lower respiratory infection (J44.0)
Index terms for J03.91
Entries in the ICD-10-CM alphabetic index that lead to this code:
Related codes in J03.9
Frequently asked questions
What is ICD-10 code J03.91?
J03.91 is the ICD-10-CM code for acute recurrent tonsillitis, unspecified, in the block J00-J06 (Acute upper respiratory infections).
Is J03.91 a billable code?
Yes. J03.91 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does J03.91 belong to?
It belongs to category J03 – Acute tonsillitis.
Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.