N30

Header — not billable

Cystitis

The ICD-10 code for cystitis is N30.

N30 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 7 more specific codes below.

Clinical notes

Excludes1 (not coded here)

An Excludes1 note is a pure exclusion: the excluded condition and this code should never be reported together, because the two conditions cannot occur at the same time (e.g. a congenital form vs. an acquired form of the same disease).

prostatocystitis (N41.3)

Use additional code

This code represents an underlying condition. When a related manifestation is also present, coding convention calls for an additional code to be listed after this one.

code to identify infectious agent (B95-B97)

Documentation support

General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.

•This is a non-billable header code. Documentation must support a more specific child code before this diagnosis can be reported on a claim.
•Confirm the excluded condition(s) listed above are not also present — Excludes1 conditions cannot be coded together with this one.
•If the associated manifestation or related condition noted above is also documented, an additional code should be reported alongside this one.
•As a general rule, code to the highest level of specificity supported by the documentation in the medical record.

N30

Clinical notes

Excludes1 (not coded here)

Use additional code

Documentation support

Child codes under N30

Related codes in this category