2026 ICD-10-CM Diagnosis Code T83.510AInfection and inflammatory reaction due to cystostomy catheter, initial encounter

ICD-10-CM Codes›S00–T88›T80-T88›T83

ICD-10-CM T83.510A
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

T83.510A is a billable ICD-10-CM diagnosis code for infection and inflammatory reaction due to cystostomy catheter, initial encounter. The 7th character A marks it as an initial encounter code, used while the patient is receiving active treatment. 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 catheter-associated urinary tract infection. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Complication of genitourinary device, implant or graft, initial encounter.

Code Identity

ICD-10-CM Code
T83.510A
Billable Status
Yes — Valid for Submission
Code Describes
Infection and inflammatory reaction due to cystostomy catheter, initial encounter
Short Description
I/I react d/t cystostomy catheter, initial encounter
Parent Code
T83.510
Infection and inflammatory reaction due to cystostomy catheter

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionT80-T88Complications of surgical and medical care, not elsewhere classified
CategoryT83Complications of genitourinary prosthetic devices, implants and grafts
This CodeT83.510AInfection and inflammatory reaction due to cystostomy catheter, initial encounter

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Catheter-associated urinary tract infection
  • Infection following cystostomy
  • Infection of urinary bladder catheter
  • Urinary tract infection following procedure

Coding GuidelinesGuidance

The appropriate 7th character is to be added to each code from block Complications of genitourinary prosthetic devices, implants and grafts (T83). Use the following options for the applicable episode of care:

  • A - initial encounter
  • D - subsequent encounter
  • S - sequela

Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2026, published by CMS and the National Center for Health Statistics.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR INJ034
Complication of genitourinary device, implant or graft, initial encounter
Default principal diagnosis: inpatient Yes · outpatient Yes

Convert T83.510A to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
996.64 React-indwell urin cath
Approximate The match is approximate rather than exact.

Code History & ChangesHistory

Replacement T83.510A replaces the following previously assigned code(s):

  • T83.51XA - Infect/inflm reaction due to indwell urinary catheter, init
FY 2018AddedAdded to the ICD-10-CM code setEffective October 1, 2017.
FY 2019–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About T83.510AOverview

Is T83.510A a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report infection and inflammatory reaction due to cystostomy catheter, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character A in T83.510A mean?

The final character A marks the initial encounter: use it while the patient is receiving active treatment for infection and inflammatory reaction due to cystostomy catheter, such as an emergency visit or first evaluation.

What MS-DRG does T83.510A group to?

When infection and inflammatory reaction due to cystostomy catheter, initial encounter 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 T83.510A?

Under the General Equivalence Mappings, infection and inflammatory reaction due to cystostomy catheter, initial encounter converts to ICD-9-CM 996.64 (react-indwell urin cath). The mapping is approximate, so confirm the match fits the documentation.