ICD-10-CM 2027 diagnosis code

J35Chronic diseases of tonsils and adenoids

Not billable — use a more specific code

J35 is a header code, so it can't be reported by itself. Choose one of the 6 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About J35

J35 is the ICD-10-CM diagnosis code for chronic diseases of tonsils and adenoids. It belongs to block J30-J39 (other diseases of upper respiratory tract) and chapter 10 (diseases of the respiratory system). It is a header code, so it can't be reported by itself; one of its 6 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: J35.0 (adenoiditis), J35.1 (tonsils), J35.2 (adenoids), J35.3 (adenoids), J35.8 (adenoids) and J35.9 (unspecified).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under J35

Notes that apply from higher levels

Instructions written at a parent level also apply to J35.

Broader instructions also apply from Chapter 10: Diseases of the respiratory system.

Code history

2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about J35

Is J35 billable?: No. J35 is a header code. Report one of its more specific subcodes instead.