N30.9

Non-billable

Cystitis, unspecified

N30.9 is the ICD-10-CM code for Cystitis, unspecified. It is a non-billable category code — use a more specific child code such as N30.90 for billing.

Status
Header (non-billable)
Chapter
N00-N99
Parent
N30
Subcodes
2
Edition
FY2026

N00-N99 Diseases of the genitourinary system

No additional coding notes for this code.

Frequently asked questions

What is ICD-10 code N30.9?
N30.9 is the ICD-10-CM code for "Cystitis, unspecified". It falls under N00-N99 Diseases of the genitourinary system.
Is N30.9 a billable code?
No — N30.9 is a non-billable header code. Use a more specific child code (such as N30.90) for billing.
What are the subcodes of N30.9?
N30.9 has 2 more specific child codes, including N30.90, N30.91.

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

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