J35.1 Hypertrophy of tonsils

Billable ICD-10-CM code, FY2026.

Applicable to

• Enlargement of tonsils

Excludes1 (never code together)

• hypertrophy of tonsils with tonsillitis (J35.0-)

MS-DRG index

Defines the logic of DRG(s) 011-013 in MDC PRE.

Approximate ICD-9-CM (GEMs)

• 474.11 Hypertrophy of tonsils alone

Code annotations containing back-references to J35.1

Back-references to J35.1

• Type 1 Excludes: J03 Acute tonsillitis ("hypertrophy of tonsils (J35.1)")

Diagnosis Index entries for J35.1

• Enlargement, enlarged › tonsils
• Hyperplasia, hyperplastic › tonsils (faucial) (infective) (lingual) (lymphoid)
• Hypertrophy, hypertrophic › lingual tonsil (infective)
• Hypertrophy, hypertrophic › tonsils (faucial) (infective) (lingual) (lymphoid)

Nearby codes

• J35 Chronic diseases of tonsils and adenoids
• J35.0 Chronic tonsillitis and adenoiditis
• J35.01 Chronic tonsillitis
• J35.02 Chronic adenoiditis
• J35.03 Chronic tonsillitis and adenoiditis
• J35.1 Hypertrophy of tonsils (this code)
• J35.2 Hypertrophy of adenoids
• J35.3 Hypertrophy of tonsils with hypertrophy of adenoids
• J35.8 Other chronic diseases of tonsils and adenoids
• J35.9 Chronic disease of tonsils and adenoids, unspecified