Neuromuscular dysfunction of bladder, not elsewhere classified
In Other diseases of the urinary system (N30-N39), chapter 14: Diseases of the Genitourinary System
5 billable codes under N31: none are a CC or MCC; none map to an HCC.
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Instructional notes
Excludes1: not coded here, use a different code
Use additional code: add a second code for this, listed after this one
- code to identify any associated urinary incontinence (N39.3-N39.4-)
Also applies, from Other diseases of the urinary system (N30-N39)
These notes sit on N30-N39 and apply to every code under it, including N31.
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Covers chronic kidney disease staging, CKD in kidney transplant patients, and sequencing CKD with related conditions such as diabetes and hypertension.
- Chronic kidney disease (page 62)
All codes under N31
N31 can't be used on a claim. Pick a billable code below; grey headings group them.
N31 MS-DRGs
As the principal diagnosis, the billable codes under N31 group to MS-DRG 698, 699, 700, 791, or 793 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
- DRG 698 Other Kidney and Urinary Tract Diagnoses with MCC (5 of 5 codes)
- DRG 699 Other Kidney and Urinary Tract Diagnoses with CC (5 of 5 codes)
- DRG 700 Other Kidney and Urinary Tract Diagnoses without CC/MCC (5 of 5 codes)
- DRG 791 Prematurity with Major Problems (1 of 5 codes)
- DRG 793 Full Term Neonate with Major Problems (1 of 5 codes)
Other codes that refer to N31
Notes on these codes point to N31.
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
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: Doctors diagnose bladder diseases using different tests. These include urine tests, x-rays, and an examination of the bladder wall with a scope called a cystoscope. Treatment depends on the cause of the problem. It may include medicines and, in severe cases, surgery.
Read more about bladder diseases on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.