2026 ICD-10-CM Diagnosis Code J35.3Hypertrophy of tonsils with hypertrophy of adenoids
ICD-10-CM Codes›J00–J99›J30-J39›J35
- Billable — Valid for Submission
- Chronic Condition
J35.3 is a billable ICD-10-CM diagnosis code for hypertrophy of tonsils with hypertrophy of adenoids. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 11 through 13, 154 through 156. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Acute and chronic tonsillitis.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Enlarged tonsil
- Enlargement of left tonsil
- Enlargement of right tonsil
- Enlargement of tonsil or adenoid
- Finding of size of tonsil
- Hyperplasia of adenoids
- Hyperplasia of tonsils
- Hyperplasia of tonsils AND adenoids
- Hypertrophy of adenoids
- Hypertrophy of lingual tonsil
- Hypertrophy of tonsils
- Hypertrophy of tonsils AND adenoids
- Tonsil and/or adenoid hypertrophy
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Type 1 Excludes
- hypertrophy of tonsils and adenoids with tonsillitis and adenoiditis J35.03
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Enlargement, enlarged See Also: Hypertrophy;
with tonsils J35.3
with adenoids J35.3
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
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.
The full article covers:
- What are adenoids?
- What are enlarged adenoids?
- What causes enlarged adenoids?
- What problems can enlarged adenoids cause?
- How can enlarged adenoids be diagnosed?
- What are the treatments for enlarged adenoids?
- What is an adenoidectomy and why might I my child need one?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert J35.3 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About J35.3Overview
What is the ICD-10 code for hypertrophy of tonsils with hypertrophy of adenoids?
The ICD-10-CM code for hypertrophy of tonsils with hypertrophy of adenoids is J35.3 (sometimes written as J353). It is billable on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
Is J35.3 (Chronic diseases of tonsils and adenoids) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report hypertrophy of tonsils with hypertrophy of adenoids on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does J35.3 group to?
When hypertrophy of tonsils with hypertrophy of adenoids is the principal diagnosis on an inpatient stay, it groups to MS-DRG 11, 12, 13, 154, 155, 156, with relative weights from 0.6911 to 5.4541 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of J35.3?
Under the General Equivalence Mappings, hypertrophy of tonsils with hypertrophy of adenoids converts to ICD-9-CM 474.10 (hypertrophy T and A). The mapping is a direct match.
