J03
Non-billableAcute tonsillitis
J03 is the ICD-10-CM code for Acute tonsillitis. It is a non-billable category code — use a more specific child code such as J03.0 for billing.
- Status
- Header (non-billable)
- Chapter
- J00-J99
- Subcodes
- 3
- Edition
- FY2026
J00-J99 Diseases of the respiratory system
What this means — in plain language
MedlinePlus · NIHWhat are tonsils? Tonsils are lumps of tissue at the back of the throat. There are two of them, one on each side. Along with the adenoids , tonsils are part of the lymphatic system. The lymphatic system clears away infection and keeps body fluids in balance. Tonsils and adenoids work by trapping the germs coming in through the mouth and nose. What is tonsillitis? Tonsillitis is an inflammation (swelling) of the…
Read more about Tonsillitis at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Excludes1 — not coded here
Excludes2 — not included here
- •chronic tonsillitis (J35.0)
Medications indicated for this condition
FDA labelingDrugs whose FDA labeling lists this condition's category among its indications. Informational only — not a treatment recommendation or medical advice.
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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