J35.9 Chronic disease of tonsils and adenoids, unspecified

Billable ICD-10-CM code, FY2026.

Applicable to

• Disease (chronic) of tonsils and adenoids NOS

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 474.9 Unspecified chronic disease of tonsils and adenoids

Diagnosis Index entries for J35.9

• Disease, diseased › adenoids (and tonsils)
• Disease, diseased › tonsils, tonsillar (and adenoids)
• Lesion (s) (nontraumatic) › tonsillar fossa

Nearby codes

• J35.03 Chronic tonsillitis and adenoiditis
• J35.1 Hypertrophy of tonsils
• 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 (this code)