2026 ICD-10-CM Diagnosis Code T85.79XAInfection and inflammatory reaction due to other internal prosthetic devices, implants and grafts, initial encounter

ICD-10-CM Codes›S00–T88›T80-T88›T85

ICD-10-CM T85.79XA
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

T85.79XA is a billable ICD-10-CM diagnosis code for infection and inflammatory reaction due to other internal prosthetic devices, implants and grafts, 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
T85.79XA
Billable Status
Yes — Valid for Submission
Code Describes
Infection and inflammatory reaction due to other internal prosthetic devices, implants and grafts, initial encounter
Short Description
Infect/inflm reaction due to oth int prosth dev/grft, init
Parent Code
T85.79
Infection and inflammatory reaction due to other internal prosthetic devices, implants and grafts

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 CodeT85.79XAInfection and inflammatory reaction due to other internal prosthetic devices, implants and grafts, initial encounter

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Allergic contact dermatitis caused by chemical
  • Allergic contact dermatitis caused by metal and/or metal compound
  • Allergic contact dermatitis caused by nickel from implant
  • Apical periodontitis
  • Bilateral chronic otitis media of ears following insertion of tympanic ventilation tube
  • Bilateral glaucoma with intraocular hemorrhage
  • Bilateral hyphema of eyes
  • Bilateral secondary open angle glaucoma due to ocular surgery
  • Bilateral uveitis-glaucoma-hyphema syndrome of eyes
  • Brain ventricular shunt infection
  • Chronic otitis media after insertion of tympanic ventilation tube
  • Chronic otitis media of left ear following insertion of tympanic ventilation tube
  • Chronic otitis media of right ear following insertion of tympanic ventilation tube
  • Complete dental peri-implantitis
  • Contact dermatitis caused by nickel
  • Dental peri-implantitis
  • Dental peri-implantitis due to dental biofilm
  • Dental prosthesis infection
  • Disorder associated with surgical mesh
  • Disorder of bile duct stent
  • Disorder of brain ventricular shunt
  • Disorder of implanted esophageal antireflux device
  • Disorder of pancreatic stent
  • Glaucoma drainage implant endophthalmitis
  • Glaucoma of left eye with intraocular hemorrhage
  • Glaucoma of right eye with intraocular hemorrhage
  • Glaucoma with intraocular hemorrhage
  • Hemorrhage associated with implant
  • Hyphema of left eye
  • Hyphema of right eye
  • Implant site pocket infection
  • Implant site reaction
  • Infected hernioplasty mesh
  • Infected tissue expander
  • Infection AND/OR inflammatory reaction due to internal prosthetic device, implant AND/OR graft
  • Infection associated with catheter
  • Infection associated with device
  • Infection associated with implant
  • Infection associated with neurological device
  • Infection associated with prosthetic intervertebral disc
  • Infection of biliary stent
  • Infection of breast implant
  • Infection of catheter exit site
  • Infection of esophageal antireflux device
  • Infection of left breast implant
  • Infection of pancreatic stent
  • Infection of right breast implant
  • Infection of ventriculoperitoneal shunt
  • Infective endocarditis of heterograft
  • Inflammation associated with device
  • Inflammation associated with implant
  • Inflammation associated with neurological device
  • Inflammatory lesion of periapical tissue surrounding dental implant
  • Inflammatory reaction of eye caused by intraocular lens implant
  • Intraocular lens associated postoperative inflammation
  • Partial dental peri-implantitis
  • Peri-implant mucositis
  • Periodontitis caused by dental appliance
  • Postoperative endophthalmitis
  • Postoperative uveitis
  • Pressure injury caused by device
  • Prosthetic infection
  • Secondary open angle glaucoma due to ocular surgery
  • Secondary open angle glaucoma of left eye due to ocular surgery
  • Secondary open angle glaucoma of right eye due to ocular surgery
  • Tissue expander disorder
  • Uveitis-glaucoma-hyphema syndrome
  • Uveitis-glaucoma-hyphema syndrome of left eye
  • Uveitis-glaucoma-hyphema syndrome of right eye
  • Ventriculoperitoneal shunt-associated peritonitis

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 T85.79XA to ICD-9-CMHistory

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

ICD-9-CM
996.69 React-int pros devic NEC
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 T85.79XAOverview

Is T85.79XA a billable code?

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

What does the 7th character A in T85.79XA 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 other internal prosthetic devices, implants and grafts, such as an emergency visit or first evaluation.

What MS-DRG does T85.79XA group to?

When infection and inflammatory reaction due to other internal prosthetic devices, implants and grafts, 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 T85.79XA?

Under the General Equivalence Mappings, infection and inflammatory reaction due to other internal prosthetic devices, implants and grafts, initial encounter converts to ICD-9-CM 996.69 (react-int pros devic NEC). The mapping is approximate, so confirm the match fits the documentation.