2026 ICD-10-CM Diagnosis Code T85.9XXAUnspecified complication of internal prosthetic device, implant and graft, initial encounter

ICD-10-CM Codes›S00–T88›T80-T88›T85

ICD-10-CM T85.9XXA
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

T85.9XXA is a billable ICD-10-CM diagnosis code for unspecified complication of internal prosthetic device, implant and graft, 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Complication of other surgical or medical care, injury, initial encounter.

Code Identity

ICD-10-CM Code
T85.9XXA
Billable Status
Yes — Valid for Submission
Code Describes
Unspecified complication of internal prosthetic device, implant and graft, initial encounter
Short Description
Unsp complication of internal prosth dev/grft, init
Parent Code
T85.9
Unspecified complication of internal prosthetic device, implant and graft

Code Classification

ChapterS00–T88Injury, poisoning and certain other consequences of external causes
SectionT80-T88Complications of surgical and medical care, not elsewhere classified
CategoryT85Complications of other internal prosthetic devices, implants and grafts
This CodeT85.9XXAUnspecified complication of internal prosthetic device, implant and graft, initial encounter

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Adverse effect of prosthetic device
  • Airway device cuff problem
  • Complication associated with device
  • Complication associated with insulin pump
  • Complication associated with nervous system implant
  • Complication associated with neurological device
  • Complication associated with saline breast implant
  • Complication associated with silicone gel-filled breast implant
  • Complication associated with vagal nerve stimulator
  • Complication of bypass graft
  • Complication of catheter
  • Complication of electronic internal device
  • Complication of internal anastomosis
  • Complication of internal device
  • Complication of internal prosthetic device
  • Complication of peritoneal dialysis
  • Complication of reimplant
  • Device failure
  • Disorder associated with surgical mesh
  • Disorder due to grafting procedure
  • Disorder following grafting procedure
  • Disorder of bile duct prosthesis
  • Disorder of bile duct stent
  • Disorder of breast implant
  • Disorder of dorsal column stimulator
  • Disorder of electrodes implanted in brain
  • Disorder of esophageal tubal prosthesis
  • Disorder of implanted esophageal antireflux device
  • Disorder of intraocular lens
  • Disorder of pancreatic duct anastomosis
  • Disorder of pancreatic stent
  • Disorder of peripheral nerve graft
  • Disorder of peritoneal dialysis catheter
  • Disorder of prostheses and implants
  • Disorders of prostheses and implants of the eye
  • Disorders of prostheses and implants of the nervous system
  • Failed subcutaneous contraceptive insertion
  • Finding of respiratory device
  • Malposition of neurostimulator generator
  • Tissue expander disorder
  • Urinary tract internal anastomosis complication

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.

CCSR INJ037
Complication of other surgical or medical care, injury, initial encounter
Default principal diagnosis: inpatient Yes · outpatient Yes

Convert T85.9XXA to ICD-9-CMHistory

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

ICD-9-CM
996.70 Comp-unsp device/graft
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About T85.9XXAOverview

Is T85.9XXA a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report unspecified complication of internal prosthetic device, implant and graft, initial encounter on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What does the 7th character A in T85.9XXA mean?

The final character A marks the initial encounter: use it while the patient is receiving active treatment for unspecified complication of internal prosthetic device, implant and graft, such as an emergency visit or first evaluation.

What MS-DRG does T85.9XXA group to?

When unspecified complication of internal prosthetic device, implant and graft, 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 T85.9XXA?

Under the General Equivalence Mappings, unspecified complication of internal prosthetic device, implant and graft, initial encounter converts to ICD-9-CM 996.70 (comp-unsp device/graft). The mapping is approximate, so confirm the match fits the documentation.