J35.0
Non-billableChronic tonsillitis and adenoiditis
J35.0 is the ICD-10-CM code for Chronic tonsillitis and adenoiditis. It is a non-billable category code — use a more specific child code such as J35.01 for billing.
J00-J99 Diseases of the respiratory system
What this means — in plain language
MedlinePlus · NIHWhat are adenoids? Adenoids are a patch of tissue that is high up in the throat, just behind the nose. They, along with the tonsils, are part of the lymphatic system. The lymphatic system clears away infection and keeps body fluids in balance. The adenoids and tonsils work by trapping germs coming in through the mouth and nose. Adenoids usually start to shrink after about age 5. By the teenage years, they are almost…
Read more about Adenoids at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Excludes2 — not included here
- •acute tonsillitis (J03.-)
Conditions mapped to this code
MedlinePlus · NIHPlain-language health-topic references grounded in MedlinePlus (NIH/NLM).
Frequently asked questions
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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