2026 ICD-10-CM Diagnosis Code T85.691AOther mechanical complication of intraperitoneal dialysis catheter, initial encounter
T85.691A is a billable ICD-10-CM diagnosis code for other mechanical complication of intraperitoneal dialysis 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 919 through 921. Coders also document this condition as blocked catheter. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Complication of other surgical or medical care, injury, initial encounter.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Blocked catheter
- Extrusion of peritoneal dialysis catheter cuff
- Leakage from Tenckhoff catheter
- Leakage of peritoneal dialysis catheter
- Malfunction of peritoneal dialysis catheter
- Obstruction of peritoneal dialysis catheter
- Obstruction of peritoneal dialysis catheter by fibrin formation
- Obstruction of Tenckhoff catheter
- Peritoneal dialysis access failure
Coding GuidelinesGuidance
The appropriate 7th character is to be added to each code from block Complications of other internal prosthetic devices, implants and grafts (T85). 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.
Patient EducationClinical
Dialysis
When your kidneys are healthy, they clean your blood. They also make hormones that keep your bones strong and your blood healthy. When your kidneys fail, you need treatment to replace the work your kidneys used to do. Unless you have a kidney transplant, you will need a treatment called dialysis.
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Convert T85.691A to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About T85.691AOverview
Is T85.691A a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other mechanical complication of intraperitoneal dialysis catheter, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What does the 7th character A in T85.691A mean?
The final character A marks the initial encounter: use it while the patient is receiving active treatment for other mechanical complication of intraperitoneal dialysis catheter, such as an emergency visit or first evaluation.
What MS-DRG does T85.691A group to?
When other mechanical complication of intraperitoneal dialysis catheter, initial encounter is the principal diagnosis on an inpatient stay, it groups to MS-DRG 919, 920, 921, with relative weights from 0.6884 to 1.8308 depending on complications. Higher weights mean higher Medicare reimbursement.
What is the ICD-9 equivalent of T85.691A?
Under the General Equivalence Mappings, other mechanical complication of intraperitoneal dialysis catheter, initial encounter converts to ICD-9-CM 996.56 (comp-periton dialys cath). The mapping is approximate, so confirm the match fits the documentation.
