NPI Atlas

J35.9 – Chronic disease of tonsils and adenoids, unspecified

ICD-10-CM 2027 diagnosis code · Other diseases of upper respiratory tract

Billable code

ICD-10-CM code J35.9

Code: J35.9 (claims format: J359)
Description: Chronic disease of tonsils and adenoids, 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: J30-J39 Other diseases of upper respiratory tract
Parent codes: J35

Notes for J35.9

Applicable to:

Disease (chronic) of tonsils and adenoids NOS

Index terms for J35.9

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in J35

J35.0 – Chronic tonsillitis and adenoiditisHeader
J35.1 – Hypertrophy of tonsilsBillable
J35.2 – Hypertrophy of adenoidsBillable
J35.3 – Hypertrophy of tonsils with hypertrophy of adenoidsBillable
J35.8 – Other chronic diseases of tonsils and adenoidsBillable

Frequently asked questions

What is ICD-10 code J35.9?

J35.9 is the ICD-10-CM code for chronic disease of tonsils and adenoids, unspecified, in the block J30-J39 (Other diseases of upper respiratory tract).

Is J35.9 a billable code?

Yes. J35.9 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does J35.9 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.