Cystitis (N30) ICD-10-CM
The N30 code range covers cystitis with 22 ICD-10-CM diagnosis codes. 14 of them are billable and valid for claim submission in fiscal year 2027, and the category headers group them but cannot themselves be billed.
Use Additional Code
The “use additional code” indicates that a secondary code could be used to further specify the patient’s condition. This note is not mandatory and is only used if enough information is available to assign an additional code.
Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- prostatocystitis N41.3
Codes in the N30 Range 22 codes · 14 billable
- N30 CystitisNon-billable
- N30.0 Acute cystitisNon-billable
- N30.00 Acute cystitis without hematuria
- N30.01 Acute cystitis with hematuria
- N30.1 Interstitial cystitis (chronic)Non-billable
- N30.10 Interstitial cystitis (chronic) without hematuria
- N30.11 Interstitial cystitis (chronic) with hematuria
- N30.2 Other chronic cystitisNon-billable
- N30.20 Other chronic cystitis without hematuria
- N30.21 Other chronic cystitis with hematuria
- N30.3 TrigonitisNon-billable
- N30.30 Trigonitis without hematuria
- N30.31 Trigonitis with hematuria
- N30.4 Irradiation cystitisNon-billable
- N30.40 Irradiation cystitis without hematuria
- N30.41 Irradiation cystitis with hematuria
- N30.8 Other cystitisNon-billable
- N30.80 Other cystitis without hematuria
- N30.81 Other cystitis with hematuria
- N30.9 Cystitis, unspecifiedNon-billable
- N30.90 Cystitis, unspecified without hematuria
- N30.91 Cystitis, unspecified with hematuria
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the N30 range.
Acute Cystitis
An acute infection of the bladder. It is usually caused by bacteria. Signs and symptoms include increased frequency of urination, pain or burning during urination, fever, cloudy or bloody urine, and suprapubic pain.
Cystitis
Inflammation of the URINARY BLADDER, either from bacterial or non-bacterial causes. Cystitis is usually associated with painful urination (dysuria), increased frequency, urgency, and suprapubic pain.
Cystitis, Interstitial
A condition with recurring discomfort or pain in the URINARY BLADDER and the surrounding pelvic region without an identifiable disease. Severity of pain in interstitial cystitis varies greatly and often is accompanied by increased urination frequency and urgency.
Trigonitis
Inflammation of the trigone of the urinary bladder.
About the N30 Code Range
Cystitis is inflammation of the urinary bladder. It can have bacterial or nonbacterial causes.
The subdivisions separate acute cystitis (N30.0), interstitial cystitis (N30.1), and other chronic cystitis (N30.2) from trigonitis (N30.3) and irradiation cystitis (N30.4). They also include other cystitis (N30.8) and unspecified cystitis (N30.9). Each subdivision then separates cases with hematuria, or blood in the urine, from cases without it.
Questions About This Page
How many billable codes are in the N30 range?
Of the 22 codes in this range, 14 are billable and valid for claim submission from October 1, 2026 through September 30, 2027. Category header codes group them but cannot be reported on claims.
What does the N30 range classify?
The range classifies cystitis. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2027 ICD-10-CM Tabular List and order file, effective October 1, 2026 through September 30, 2027.
