2026 ICD-10-CM Diagnosis Code J35.2Hypertrophy of adenoids
ICD-10-CM Codes›J00–J99›J30-J39›J35
- Billable — Valid for Submission
- Chronic Condition
J35.2 is a billable ICD-10-CM diagnosis code for 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 154 through 156. Coders also document this condition as adenoid facies. 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.
- Adenoid facies
- Hyperplasia of adenoids
- Hypertrophy of adenoids
- Large adenoids
- Size of adenoids - finding
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Enlargement of adenoids
Type 1 Excludes
- hypertrophy of adenoids with adenoiditis J35.0
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
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;
- adenoids - J35.2
- adenoids - J35.2
- adenoids (infective) - J35.2
- nasopharynx, lymphoid (infectional) (tissue) (wall) - J35.2
- pharyngeal tonsil - J35.2
- lymphoid (infectional) (tissue) (wall) - J35.2
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Enlargement, enlarged
- adenoids
- Hyperplasia, hyperplastic
- adenoids
- Hypertrophy, hypertrophic
- adenoids (infective)
- Hypertrophy, hypertrophic
- nasopharynx, lymphoid (infectional) (tissue) (wall)
- Hypertrophy, hypertrophic
- pharyngeal tonsil
- Hypertrophy, hypertrophic
- pharynx
- lymphoid (infectional) (tissue) (wall)
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 J35.2 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About J35.2Overview
Is J35.2 (Chronic diseases of tonsils and adenoids) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report hypertrophy of adenoids on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does J35.2 group to?
When hypertrophy of adenoids is the principal diagnosis on an inpatient stay, it groups to MS-DRG 154, 155, 156, with relative weights from 0.6911 to 1.5635 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of J35.2?
Under the General Equivalence Mappings, hypertrophy of adenoids converts to ICD-9-CM 474.12 (hypertrophy adenoids). The mapping is a direct match.
Footnotes
[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:
- The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
- The condition places limitations on self-care, independent living, and social interactions.
