J35.03 – Chronic tonsillitis and adenoiditis
ICD-10-CM 2027 diagnosis code · Other diseases of upper respiratory tract
ICD-10-CM code
J35.03
- Code
J35.03(claims format:J3503)- Description
- Chronic tonsillitis and adenoiditis
- 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
- J30-J39 Other diseases of upper respiratory tract
- Parent codes
- J35 › J35.0
Notes inherited from parent codes
Instructional notes at a category or block level apply to every code below it.
J35.0 – Chronic tonsillitis and adenoiditis
Excludes2 (not included here):
- acute tonsillitis (J03.-)
Index terms for J35.03
Entries in the ICD-10-CM alphabetic index that lead to this code:
- Adenoiditis, with tonsillitis
- Tonsillitis, chronic, with adenoiditis
- Septic, tonsils, chronic, with adenoiditis
- Tonsillitis, hypertrophic, with adenoiditis
- Infection, infected, infective, pharynx, posterior, lymphoid
- Infection, infected, infective, lymphoid tissue, base of tongue or posterior pharynx, NEC
Related codes in J35.0
- J35.01 – Chronic tonsillitisBillable
- J35.02 – Chronic adenoiditisBillable
Frequently asked questions
What is ICD-10 code J35.03?
J35.03 is the ICD-10-CM code for chronic tonsillitis and adenoiditis, in the block J30-J39 (Other diseases of upper respiratory tract).
Is J35.03 a billable code?
Yes. J35.03 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.
What category does J35.03 belong to?
It belongs to category J35 – Chronic diseases of tonsils and adenoids.
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.