ICD-10 Code J35.3 – Hypertrophy of tonsils with hypertrophy of adenoids (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code J35.3 – Hypertrophy of tonsils with hypertrophy of adenoids
What it is
This code identifies enlarged tonsils and enlarged adenoids occurring together. It is used when the chart documents both structures as hypertrophic.
Clinical signs
Common findings include mouth breathing, snoring, and obstructive sleep symptoms. Clinical features vary; refer to documentation.
When to use this code
Use J35.3 when the provider documents hypertrophy of both tonsils and adenoids, whether the enlargement is incidental or causing symptoms. It also fits preoperative or ENT evaluations that confirm the combined condition. If only one structure is enlarged, check documentation for a more specific code.
Do not use for
Do not use this code when only tonsillar hypertrophy or only adenoid hypertrophy is documented. Do not assign it if the record describes infection, abscess, or another separate throat disorder without confirmed hypertrophy.
Coding tip
Confirm that both tonsils and adenoids are documented as enlarged before coding J35.3.