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T85.79XA ICD-10-CM Code: Infection and inflammatory reaction due to other internal prosthetic devices, implants and grafts, initial encounter

Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Inpatient Payment Groups (MS-DRG)

MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43.0, Appendix B.

  • MS-DRG 919 — COMPLICATIONS OF TREATMENT WITH MCC (MDC 21)
  • MS-DRG 920 — COMPLICATIONS OF TREATMENT WITH CC (MDC 21)
  • MS-DRG 921 — COMPLICATIONS OF TREATMENT WITHOUT CC/MCC (MDC 21)

A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.

Official Registry Overview & Definition

Infection and inflammatory reaction due to other internal prosthetic devices, implants and grafts, initial encounter is a billable ICD-10-CM diagnosis code (T85.79A).

Official Tabular Instructional Notes

Sequencing, inclusion, and exclusion notes published for T85.79XA in the official ICD-10-CM tabular list.

Excludes2 — Not Included Here

Conditions not covered by this code, but which may be reported alongside it when both are present.

Use Additional Code

Supplementary codes the tabular list directs you to add.

  • Use additional code to identify infection
  • Use additional code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
  • Use additional code(s) to identify the specified condition resulting from the complication
  • Use additional code to identify devices involved and details of circumstances (Y62-Y82)

Frequently Compared Codes

The official Excludes notes on T85.79XA name these codes. Each comparison page covers when the two can — or must not — be reported together.

Change history

No changes recorded for this code — unchanged since the FY2016 baseline of the change ledger.

Verify Before Coding

  • CC as a secondary diagnosis (FY2026). Can raise the stay's MS-DRG severity tier.

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim.

Contextual Map

Every relationship of T85.79XA in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Hierarchy

  • S00-T88 — Chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88) (S00-T88) [Hierarchy]
  • T80-T88 — Complications of surgical and medical care, not elsewhere classified [Hierarchy]

Clinical classification (CCSR)

  • INJ037 — Complication of other surgical or medical care, injury, initial encounter [CCSR]

Potential MS-DRG

  • CC — Complication or Comorbidity [MS-DRG severity]: “As a secondary diagnosis this code can raise the stay's MS-DRG severity tier (CC).”
  • DRG 919 — COMPLICATIONS OF TREATMENT WITH MCC [MS-DRG]: “COMPLICATIONS OF TREATMENT WITH MCC (MDC 21)”
  • DRG 920 — COMPLICATIONS OF TREATMENT WITH CC [MS-DRG]: “COMPLICATIONS OF TREATMENT WITH CC (MDC 21)”
  • DRG 921 — COMPLICATIONS OF TREATMENT WITHOUT CC/MCC [MS-DRG]: “COMPLICATIONS OF TREATMENT WITHOUT CC/MCC (MDC 21)”

MDC crossing · procedures (32029)

  • MDC 21 — Injuries, Poisonings and Toxic Effects of Drugs [MDC crossing]: “Injuries, Poisonings and Toxic Effects of Drugs — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs.”
  • 0016070 — Bypass Cerebral Ventricle to Nasopharynx with Autologous Tissue Substitute, Open Approach [Same-MDC procedure]: “Bypass Cerebral Ventricle to Nasopharynx with Autologous Tissue Substitute, Open Approach — grouped in MDC 21, the procedure side of this code's crossing.” · check together
  • 0016071 — Bypass Cerebral Ventricle to Mastoid Sinus with Autologous Tissue Substitute, Open Approach [Same-MDC procedure]: “Bypass Cerebral Ventricle to Mastoid Sinus with Autologous Tissue Substitute, Open Approach — grouped in MDC 21, the procedure side of this code's crossing.” · check together
  • 0016072 — Bypass Cerebral Ventricle to Atrium with Autologous Tissue Substitute, Open Approach [Same-MDC procedure]: “Bypass Cerebral Ventricle to Atrium with Autologous Tissue Substitute, Open Approach — grouped in MDC 21, the procedure side of this code's crossing.” · check together
  • 0016073 — Bypass Cerebral Ventricle to Blood Vessel with Autologous Tissue Substitute, Open Approach [Same-MDC procedure]: “Bypass Cerebral Ventricle to Blood Vessel with Autologous Tissue Substitute, Open Approach — grouped in MDC 21, the procedure side of this code's crossing.” · check together
  • 0016074 — Bypass Cerebral Ventricle to Pleural Cavity with Autologous Tissue Substitute, Open Approach [Same-MDC procedure]: “Bypass Cerebral Ventricle to Pleural Cavity with Autologous Tissue Substitute, Open Approach — grouped in MDC 21, the procedure side of this code's crossing.” · check together
  • and 32024 more

Nearest codes (40)

  • T85 — Complications of other internal prosthetic devices, implants and grafts [Sibling]
  • T85.732A — Infection and inflammatory reaction due to implanted electronic neurostimulator of peripheral nerve, electrode (lead), initial encounter [Sibling]
  • T85.732D — Infection and inflammatory reaction due to implanted electronic neurostimulator of peripheral nerve, electrode (lead), subsequent encounter [Sibling]
  • T85.732S — Infection and inflammatory reaction due to implanted electronic neurostimulator of peripheral nerve, electrode (lead), sequela [Sibling]
  • T85.733 — Infection and inflammatory reaction due to implanted electronic neurostimulator of spinal cord, electrode (lead) [Sibling]
  • T85.733A — Infection and inflammatory reaction due to implanted electronic neurostimulator of spinal cord, electrode (lead), initial encounter [Sibling]
  • T85.733D — Infection and inflammatory reaction due to implanted electronic neurostimulator of spinal cord, electrode (lead), subsequent encounter [Sibling]
  • T85.733S — Infection and inflammatory reaction due to implanted electronic neurostimulator of spinal cord, electrode (lead), sequela [Sibling]
  • and 32 more

Relationships & Classification

Clinical classification (AHRQ CCSR):INJ037 — Complication of other surgical or medical care, injury, initial encounter (default).

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Potential MS-DRG Relationships (FY2026)

CC — Complication or Comorbidity. Reported as a secondary diagnosis, this code raises the stay's MS-DRG severity tier — except when the principal diagnosis is one of 457 clinically related codes on its CMS exclusion list.

Named in the grouper logic of 3 MS-DRGs: DRG 919 (MDC 21), DRG 920 (MDC 21), DRG 921 (MDC 21).

From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.

Frequently Asked Questions (FAQ) & Clinical Guidance

Does T85.79XA require a 7th character?

Yes. The appropriate 7th character is to be added to each code from category T85.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to T85.79XA in its code family, with their registry titles.

  • T85.738 — Infection and inflammatory reaction due to other nervous system device, implant or graft
  • T85.738A — Infection and inflammatory reaction due to other nervous system device, implant or graft, initial encounter
  • T85.738D — Infection and inflammatory reaction due to other nervous system device, implant or graft, subsequent encounter
  • T85.738S — Infection and inflammatory reaction due to other nervous system device, implant or graft, sequela
  • T85.79 — Infection and inflammatory reaction due to other internal prosthetic devices, implants and grafts
  • T85.79XD — Infection and inflammatory reaction due to other internal prosthetic devices, implants and grafts, subsequent encounter
  • T85.79XS — Infection and inflammatory reaction due to other internal prosthetic devices, implants and grafts, sequela
  • T85.8 — Other specified complications of internal prosthetic devices, implants and grafts, not elsewhere classified
  • T85.81 — Embolism due to internal prosthetic devices, implants and grafts, not elsewhere classified
  • T85.810 — Embolism due to nervous system prosthetic devices, implants and grafts

View all codes in the T85 family