ICD-10-CM N30 is the diagnosis code for Cystitis. This code falls under the section "Other diseases of the urinary system" within Chapter 14 — Diseases of the genitourinary system (N00-N99). It is a non-billable/non-specific ICD-10-CM code that should not be used for reimbursement. A more specific sub-code is required for billing. Medical coders and healthcare providers use this code to document and classify diagnoses in electronic health records, insurance claims, and clinical databases.
The following conditions should never be coded at the same time as N30. They are mutually exclusive:
Understanding where N30 sits in the ICD-10-CM classification helps ensure proper coding:
No, N30 is a non-billable/non-specific code. You should use a more specific sub-code for billing and reimbursement.
N30 is the ICD-10-CM diagnosis code for "Cystitis". It is used by healthcare providers to classify and document this condition in medical records and insurance claims.
N30 is located in Section N30-N39 — "Other diseases of the urinary system" within Chapter 14 of the ICD-10-CM Tabular List.
N30 has 7 sub-code(s) that provide more specific detail: N30.0, N30.1, N30.2, N30.3, N30.4 and more.
Use N30 when the patients documented diagnosis matches "Cystitis" and the clinical documentation supports this level of specificity. Always verify with the latest ICD-10-CM guidelines and payer requirements.
The ICD-10-CM code for Cystitis is N30.
No, N30 is non-billable. Use a more specific sub-code for primary diagnosis billing.
N30 is in Chapter 14 of the ICD-10-CM Tabular List.
Type 1 Excludes for N30 include: prostatocystitis (N41.3).
Yes, N30 is a valid ICD-10-CM code for the 2026 fiscal year, subject to official CMS updates.