2027 ICD-10-CM Diagnosis Code N30.00Acute cystitis without hematuria
ICD-10-CM Codes›N00–N99›N30-N39›N30
- Billable — Valid for Submission
- CC — Complication or Comorbidity
- Not Chronic
N30.00 is a billable ICD-10-CM diagnosis code for acute cystitis without hematuria. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 689 through 690, 791, 793. As a secondary diagnosis, it counts as a complication or comorbidity (CC) and moves an inpatient stay to a higher severity level within its MS-DRG family. It does not count, however, when the principal diagnosis is one of 75 closely related codes. Coders also document this condition as acute bacterial simple cystitis. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Urinary tract infections.
This medical diagnosis code is frequently used in Family Practice, Internal Medicine, OB/GYN, and Pediatrics medical specialties to designate conditions such urinary tract infection, cystitis.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acute bacterial simple cystitis
- Acute culture positive cystitis
- Acute cystitis
- Acute cystitis - culture-negative
- Acute infective cystitis
- Acute lower urinary tract infection
- Acute on chronic cystitis
- Acute recurrent cystitis
- Recurrent cystitis
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to N30.00: its own notes plus those printed at N30.0, N30, block N30-N39, and Chapter 14. A note printed at a category, block or chapter applies to every code under it.
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Use Additional Code
Add a second code, after this one, to fully describe the condition.
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name N30.00, its category, or a range that includes it.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
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.
Patient EducationClinical
Bladder Diseases
The bladder is a hollow organ in your lower abdomen that stores urine. Many conditions can affect your bladder. Some common ones are:
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert N30.00 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About N30.00Overview
What is the ICD-10 code for acute cystitis without hematuria?
The ICD-10-CM code for acute cystitis without hematuria is N30.00 (sometimes written as N3000). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is N30.00 (Acute cystitis) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report acute cystitis without hematuria on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does N30.00 group to?
When acute cystitis without hematuria is the principal diagnosis on an inpatient stay, it groups to MS-DRG 793, 791, 689, 690, with relative weights from 0.8008 to 4.2192 depending on complications. Higher weights mean higher Medicare reimbursement.
Is N30.00 a CC or MCC?
CMS lists N30.00 as a CC (complication or comorbidity) for FY 2027. Reported as a secondary diagnosis, it moves the inpatient stay to a higher-weighted DRG within its severity family. It does not count when the principal diagnosis is one of the 75 closely related codes in its exclusion list.
Can N30.00 be reported with a code from N30.4?
Not as a rule. The Excludes1 note at N30.0, which applies to N30.00, lists "irradiation cystitis (N30.4-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
