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J03.9

Non-billable

Acute tonsillitis, unspecified

J03.9 is the ICD-10-CM code for Acute tonsillitis, unspecified. It is a non-billable category code — use a more specific child code such as J03.90 for billing.

Status
Header (non-billable)
Chapter
J00-J99
Parent
J03
Subcodes
2
Edition
FY2026

J00-J99 Diseases of the respiratory system

Includes

  • •Follicular tonsillitis (acute)
  • •Gangrenous tonsillitis (acute)
  • •Infective tonsillitis (acute)
  • •Tonsillitis (acute) NOS
  • •Ulcerative tonsillitis (acute)

Excludes1 — not coded here

Frequently asked questions

What is ICD-10 code J03.9?
J03.9 is the ICD-10-CM code for "Acute tonsillitis, unspecified". It falls under J00-J99 Diseases of the respiratory system.
Is J03.9 a billable code?
No — J03.9 is a non-billable header code. Use a more specific child code (such as J03.90) for billing.
What are the subcodes of J03.9?
J03.9 has 2 more specific child codes, including J03.90, J03.91.
What is excluded from J03.9?
Excludes1 (not coded here): influenza virus with other respiratory manifestations (J09.X2, J10.1, J11.1).

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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