J35.01 Chronic tonsillitis

Billable ICD-10-CM code, FY2026.

Applies from J35.0 Chronic tonsillitis and adenoiditis

Excludes2 (not included here)

• acute tonsillitis (J03.-)

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 474.00 Chronic tonsillitis

Code annotations containing back-references to J35.01

Back-references to J35.0

• Type 2 Excludes: J03 Acute tonsillitis ("chronic tonsillitis (J35.0)")
• Type 1 Excludes: J35.1 Hypertrophy of tonsils ("hypertrophy of tonsils with tonsillitis (J35.0-)")
• Type 1 Excludes: J35.2 Hypertrophy of adenoids ("hypertrophy of adenoids with adenoiditis (J35.0-)")
• Type 1 Excludes: J36 Peritonsillar abscess ("chronic tonsillitis (J35.0)")

Diagnosis Index entries for J35.01

• Infection, infected, infective (opportunistic) › focal › tonsils
• Remnant › tonsil › infected (chronic)
• Septic › tonsils, chronic
• Tonsillitis (acute) (catarrhal) (croupous) (follicular) (gangrenous) (infective) (lacunar) (lingual) (malignant) (membranous) (parenchymatous) (phlegmonous) (pseudomembranous) (purulent) (septic) (subacute) (suppurative) (toxic) (ulcerative) (vesicular) (viral) › chronic
• Tonsillitis (acute) (catarrhal) (croupous) (follicular) (gangrenous) (infective) (lacunar) (lingual) (malignant) (membranous) (parenchymatous) (phlegmonous) (pseudomembranous) (purulent) (septic) (subacute) (suppurative) (toxic) (ulcerative) (vesicular) (viral) › hypertrophic

Nearby codes

• J35 Chronic diseases of tonsils and adenoids
• J35.0 Chronic tonsillitis and adenoiditis
• J35.01 Chronic tonsillitis (this code)
• J35.02 Chronic adenoiditis
• 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