2026 ICD-10-CM Diagnosis Code N32.81Overactive bladder
ICD-10-CM Codes›N00–N99›N30-N39›N32
- Billable — Valid for Submission
- Chronic Condition
N32.81 is a billable ICD-10-CM diagnosis code for overactive bladder. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 698 through 700. Coders also document this condition as autonomic hyperreflexia of urinary bladder. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified diseases of bladder and urethra.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Autonomic hyperreflexia of urinary bladder
- Detrusor overactivity
- Finding of urinary bladder compliance
- Idiopathic detrusor overactivity
- Low compliance urinary bladder
- Neurogenic detrusor overactivity
- Overactive urinary bladder
- Overactive urinary bladder due to prolapse of female genital organ
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Detrusor muscle hyperactivity
Type 1 Excludes
- frequent urination due to specified bladder condition- code to condition
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
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.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- Hyperactive, hyperactivity - F90.9
- detrusor muscle - N32.81
- Overactive - See Also: Hyperfunction;
- bladder - N32.81
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Hyperactive, hyperactivity
- detrusor muscle
- Overactive
- bladder
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Overactive Bladder
Overactive bladder is a condition in which the bladder squeezes urine out at the wrong time. You may have overactive bladder if you have two or more of these symptoms:
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert N32.81 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About N32.81Overview
Is N32.81 (Other specified disorders of bladder) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report overactive bladder on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does N32.81 group to?
When overactive bladder is the principal diagnosis on an inpatient stay, it groups to MS-DRG 698, 699, 700, with relative weights from 0.6899 to 1.6544 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of N32.81?
Under the General Equivalence Mappings, overactive bladder converts to ICD-9-CM 596.51 (hypertonicity of bladder). The mapping is a direct match.
Footnotes
[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:
- The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
- The condition places limitations on self-care, independent living, and social interactions.
