Cystitis ICD-10-CM Codes

Explore the common ICD-10 codes used for cystitis and learn more about their billability, clinical descriptions, synonyms, etc.

By Joshua Napilay on Aug 8, 2025.

Fact Checked by Ericka Pingol.

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What ICD-10 Codes are Used for Cystitis

Here’s a list of the common ICD-10 codes for cystitis that practitioners can use for coding, billing, documentation, etc.

N30.00: Acute cystitis without hematuria
N30.01: Acute cystitis with hematuria
N30.10: Interstitial cystitis (chronic) without hematuria
N30.11: Interstitial cystitis (chronic) with hematuria
N30.20: Other chronic cystitis without hematuria
N30.21: Other chronic cystitis with hematuria
N30.40: Irradiation cystitis without hematuria
N30.41: Irradiation cystitis with hematuria
N30.80: Other cystitis without hematuria
N30.81: Other cystitis with hematuria
N30.90: Cystitis, unspecified without hematuria
N30.91: Cystitis, unspecified with hematuria

Which Cystitis ICD codes are Billable:

All of the mentioned cystitis ICD codes are billable.

Clinical Information

Cystitis is a bladder infection wherein the bladder is inflamed. There are two types of cystitis: acute cystitis (sudden) and interstitial cystitis (long-term).
Common causes of cystitis are UTI, certain medications, radiation exposure, hygiene products, and catheter use.
Symptoms of cystitis are bladder fullness sensation, blood in urine, cloudy urine, frequent urge to urinate, cramping in the abdomen/back, pain during sexual intercourse, and low-grade fever with a UTI.
A practitioner will examine a patient’s urine sample and do a cystoscopy or imaging tests to diagnose cystitis.
Cystitis treatments will vary depending on the cause, but some a practitioner may mention are medication, surgery, and home care treatments like heating pads, pain relievers, and a lot of fluid.

Synonyms Include:

Acute cystitis
Recurrent cystitis
Bacterial cystitis
Infective cystitis
Viral cystitis

Commonly asked questions

You can use a Cystitis ICD Code once you’ve confirmed the diagnosis with exams and tests.

Yes, the cystitis diagnosis codes are billable.

Common treatments for cystitis are surgery, medication, and home care treatments like ingesting a lot of fluid, pain relievers, and using heating pads.

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