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T85.840D ICD-10-CM Code: Pain due to nervous system prosthetic devices, implants and grafts, subsequent encounter

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

Coding at a Glance

7th character
Required — see the character table on this page
Tabular directives
22 Excludes2 · 3 use-additional codes

Inpatient Payment Groups (MS-DRG)

Potential MS-DRG participation — not a DRG assignment.

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

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.

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for T85.840D in the official ICD-10-CM tabular list, quoted as published.

Notes without a marker are published on T85.840D itself; “inherited from” names the category or block whose note applies here.

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 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)

Source: inherited from T80-T88

7th Character Guide

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

  • A — initial encounter
  • D — subsequent encounter (this page’s code)
  • S — sequela

How the encounter character is assigned. “Initial encounter” means the patient is receiving active treatment for the condition — it is not limited to the first visit, and a different or new provider giving active treatment still assigns it. “Subsequent encounter” covers care during the healing or recovery phase after active treatment. “Sequela” is for complications or conditions that arise as a direct result of the original condition.

ICD-10-CM Official Guidelines for Coding and Reporting, Section I.C.19.a (paraphrased by MedCoder).

Variant codes in this family

T85.840A, T85.840D, T85.840S

Character meanings are CMS's official 7th-character extensions for this family, as carried in each variant code's official description; variant codes are registry rows. The explanation of how the encounter character is assigned is MedCoder editorial, distinct from the official content above it.

Coder workflow for T85.840D

MedCoder structured workflow — derived from this code’s own official record

Before you code T85.840D

  1. A 7th character is required in this family. Confirm the documented encounter: initial (active treatment), subsequent (healing or recovery phase), or sequela. This page’s code carries “D”. “Initial” means active treatment, not the first visit (Guidelines I.C.19.a).

    See the 7th Character Guide · Guide: 7th characters: initial, subsequent, sequela →

  2. T85.840D’s title joins a condition with an associated condition or complication. Confirm each component is documented. Where the classification presumes the link through the “with” convention, only a provider statement that the conditions are unrelated defeats it. A combination code is assigned only when it fully identifies the documented conditions; a required second code for the stage, type or manifestation is still reported when the notes ask for it (Guidelines I.B.9, I.A.15).

    Guide: Combination codes →

Choose the right path

  1. Is the encounter phase documented — active treatment, healing or recovery, or a sequela?
    Yes → Assign the matching 7th character; the variant codes are in the 7th Character Guide.
    No → The code is invalid without its 7th character — query for the missing element.

Consider T85.840D. Then work the Use Additional Code note, and confirm the code is valid for the date of service in the Verify section.

Documentation check

The provider’s diagnostic statement
Codes are assigned from the provider’s documented diagnosis, not from clinical criteria, test values or a medication list (Guidelines I.A.19).
Encounter type
Active treatment, healing or recovery phase, or sequela — the basis of the 7th character (Guidelines I.C.19.a).
The associated condition or complication
Whether the associated condition the title names is documented; the “with” convention presumes some links, and a provider statement that the conditions are unrelated defeats it (Guidelines I.A.15).
The conditions the Use Additional Code note names
Reported with this code when documented; a conditional instruction (“if applicable”, “if known”) applies only when the record supports it.

Official instructions as workflow

  • Excludes2 — not part of T85.840D(22 notes)

    Coding workflow: The conditions named in this note are not included in T85.840D. When the record documents both, both may be reported; the note is a boundary, not a prohibition.

    CompareT86, Z93, Z43, Z44, R50.82, G97.0

    See the official tabular notes · Guidelines I.A.12.b

  • Use Additional Code — after identifying T85.840D(3 notes)

    Coding workflow: Check whether the documentation supports the additional code(s) the note names, and report them with T85.840D when it does. Where the instruction is conditional (“if applicable”, “if known”), it applies only when the record documents the condition.

    See the official tabular notes · Guidelines I.A.13

Coding decision scenarios

Pattern scenarios for this code’s structure — decision rules, not clinical cases

Documentation: The patient returns during the healing or recovery phase after active treatment of the same condition.

Coding question: Which 7th character applies?

Path: Review the official 7th-character definitions for this family in the 7th Character Guide.

Reason: “Initial encounter” means active treatment, not the first visit; care during recovery takes “subsequent encounter”, and a complication arising from the original condition takes “sequela” (Guidelines I.C.19.a).

Documentation: Only one of the components this code’s title joins is documented.

Coding question: Is T85.840D supported?

Path: Review the code for the documented component on its own.

Reason: A combination code is assigned only when it fully identifies the documented conditions; otherwise the documented component takes its own code (Guidelines I.B.9).

Documentation: A condition the Use Additional Code note names is documented.

Coding question: Is a second code reported with T85.840D?

Path: Review the Use Additional Code note and the code it names.

Reason: The additional code is reported when the record documents the condition; a conditional instruction applies only when its condition is met (Guidelines I.A.13).

Every row is derived from this code’s own record — its title, tabular notes, 7th-character family and same-category siblings — with fixed MedCoder wording; nothing is inferred about a patient. The official notes and guideline text are in the sections each row links to, and they control.

Code Overview

Pain due to nervous system prosthetic devices, implants and grafts, subsequent encounter is a billable ICD-10-CM diagnosis code (T85.840D).

MedCoder summary Summary composed by MedCoder from this code's official ICD-10-CM record. The tabular instructional notes themselves appear verbatim below.

Indexed Clinical Terms (10)

Official source data — entries quoted as published, in the Index’s own lookup phrasing

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code. These are alphabetic-index entries shown as the Index writes them — lookup phrasing, not necessarily the wording of a final diagnosis.

Decision Points

The directives on this code's own record, as a pre-claim checklist.

  1. A 7th character applies in this family. Confirm the documented encounter matches the character assigned. See the official 7th-character definitions and this code’s variants
  2. 3 Use Additional Code instructions — report the named additional code(s) when the documentation supports them. See the Use Additional Code notes
  3. 22 Excludes2 entries — those conditions are not part of this code and may be reported additionally when documented. See the Excludes2 notes

Checklist rows are derived from this code's own official directives; the wording of each check is MedCoder editorial. The official notes themselves are in the sections each row links to.

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 in Claim Check.

Relationships & Classification

MedCoder structured relationships — computed from published CMS and AHRQ datasets

Other codes that name T85.840D or its code family, from the CMS ICD-10-CM tabular instructional notes. Tabular-note edges are stored at the code family level that carries each note.

Referenced by 2 Excludes1 notes across 2 chapters: T88.7 — Unspecified adverse effect of drug or medicament (via T85.-), Z97 — Presence of other devices (via T85.-).

These codes’ tabular lists mark this diagnosis as mutually exclusive — not reported together unless the conditions are documented as unrelated.

Referenced by 8 Excludes2 notes across 3 chapters: G89 — Pain, not elsewhere classified (via T85.84.-), T78 — Adverse effects, not elsewhere classified (via T85.-), T79 — Certain early complications of trauma, not elsewhere classified (via T85.-), T80.1 — Vascular complications following infusion, transfusion and therapeutic injection (via T85.8.-), T81 — Complications of procedures, not elsewhere classified (via T85.-), T81.59 — Other complications of foreign body accidentally left in body following procedure (via T85.-), T88 — Other complications of surgical and medical care, not elsewhere classified (via T85.-), Z96 — Presence of other functional implants (via T85.-).

These codes’ tabular lists name this diagnosis as distinct — both may be reported when both are documented.

MS-DRG Grouper Relationships (FY2026)

Potential MS-DRG participation — not a DRG assignment.

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 2 MS-DRGs: DRG 949 (MDC 23), DRG 950 (MDC 23).

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

Clinical classification (AHRQ CCSR):INJ072 — Complication of other surgical or medical care, injury, subsequent encounter (default).

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

Related Codes

Same injury, other encounter phase

Same injury, coded at a different phase of treatment via the 7th character.

T85.840A — Pain due to nervous system prosthetic devices, implants and grafts, initial encounterCompare T85.840D vs T85.840A →, T85.840S — Pain due to nervous system prosthetic devices, implants and grafts, sequela

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Complication of other surgical or medical care, injury, subsequent encounter).

T85.734D — Infection and inflammatory reaction due to implanted electronic neurostimulator, generator, subsequent encounter, T85.735D — Infection and inflammatory reaction due to cranial or spinal infusion catheter, subsequent encounter, T85.738D — Infection and inflammatory reaction due to other nervous system device, implant or graft, subsequent encounter, T85.79XD — Infection and inflammatory reaction due to other internal prosthetic devices, implants and grafts, subsequent encounter, T85.810D — Embolism due to nervous system prosthetic devices, implants and grafts, subsequent encounter, T85.818D — Embolism due to other internal prosthetic devices, implants and grafts, subsequent encounter, T85.820D — Fibrosis due to nervous system prosthetic devices, implants and grafts, subsequent encounter, T85.828D — Fibrosis due to other internal prosthetic devices, implants and grafts, subsequent encounter, T85.830D — Hemorrhage due to nervous system prosthetic devices, implants and grafts, subsequent encounter, T85.838D — Hemorrhage due to other internal prosthetic devices, implants and grafts, subsequent encounter, T85.848D — Pain due to other internal prosthetic devices, implants and grafts, subsequent encounter, T85.850D — Stenosis due to nervous system prosthetic devices, implants and grafts, subsequent encounter, T85.858D — Stenosis due to other internal prosthetic devices, implants and grafts, subsequent encounter, T85.860D — Thrombosis due to nervous system prosthetic devices, implants and grafts, subsequent encounter, T85.868D — Thrombosis due to other internal prosthetic devices, implants and grafts, subsequent encounter, T85.890D — Other specified complication of nervous system prosthetic devices, implants and grafts, subsequent encounter, T85.898D — Other specified complication of other internal prosthetic devices, implants and grafts, subsequent encounter, T85.9XXD — Unspecified complication of internal prosthetic device, implant and graft, subsequent encounter, T88.0XXD — Infection following immunization, subsequent encounter, T88.1XXD — Other complications following immunization, not elsewhere classified, subsequent encounter, +209 more

Contextual Map

Every relationship of T85.840D 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.

Run T85.840D with these 10 related codes in Claim Check

Hierarchy

Referenced by Excludes1 notes

Referenced by Excludes2 notes

Clinical classification (CCSR)

MS-DRG Grouper

  • CC — Complication or Comorbidity [MS-DRG severity]: “As a secondary diagnosis this code can raise the stay's MS-DRG severity tier (CC).”— CMS MS-DRG Definitions Manual (Appendix C) · FY2026
  • DRG 949 — AFTERCARE WITH CC/MCC[MS-DRG]: “AFTERCARE WITH CC/MCC (MDC 23)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026
  • DRG 950 — AFTERCARE WITHOUT CC/MCC[MS-DRG]: “AFTERCARE WITHOUT CC/MCC (MDC 23)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026

MDC crossing

  • MDC 23 — Factors Influencing Health Status and Other Contacts with Health Services[MDC crossing]: “Factors Influencing Health Status and Other Contacts with Health Services — 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. 1,235 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2026

Index entries (10)

  • Complication (s) (from) (of), catheter NEC (device), epidural infusion, pain[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Complication (s) (from) (of), catheter NEC (device), subdural infusion, pain[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Complication (s) (from) (of), electronic stimulator device, brain, pain[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Complication (s) (from) (of), electronic stimulator device, nervous system, pain[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Complication (s) (from) (of), electronic stimulator device, peripheral nerve, pain[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Complication (s) (from) (of), electronic stimulator device, spinal cord, pain[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Complication (s) (from) (of), ventricular (communicating) shunt (device), pain[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Pain (s), due to device, implant or graft, catheter NEC, infusion NEC, spinal (epidural) (subdural)[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • and 2 more

Nearest codes (40)

Change history

Common coding questions

Does T85.840D require a 7th character?

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

Sources for this page

Codes, titles, notes, index terms and mappings on this page are transcribed from the datasets below. Relationships MedCoder computed and text MedCoder wrote are labelled where they appear.

Code, title, tabular notes and index terms Official source data
CMS/CDC ICD-10-CM FY2026 tabular list, index and tables, effective October 1, 2025 Release, file and checksum · Publisher’s page
Claim edits Official source data
CMS Definitions of Medicare Code Edits — v43.1 (April 2026) Release, file and checksum · Publisher’s page
Inpatient payment groups Official source data
CMS MS-DRG Definitions Manual (incl. Appendix B diagnosis index, Appendix C CC/MCC list, Appendix E procedure index) and IPPS Final Rule tables — v43 Release, file and checksum · Publisher’s page
Change history and date-of-service validity Official source data
CMS ICD-10-CM release addenda, ingested release by release into the change ledger Release, file and checksum · Publisher’s page
Comparisons, relationships and the contextual map MedCoder structured relationship
Computed by MedCoder from the tabular notes and tables above; every derived relationship is marked as derived where it appears
Summary and FAQ answers MedCoder explanation
Written by MedCoder to explain the sources above: drafted with AI assistance, checked by a person against the release files, and labelled as MedCoder text where it appears. Not official text.

Labels on this page: Official source data · MedCoder structured relationship · MedCoder explanation. How to read the labels · All data sources and release dates

Change history

  • FY2017 — October 1, 2016
    Added to the code set
    Pain due to nervous system prosthetic devices, implants and grafts, subsequent encounter
    FY2017 changes

Nearest Codes in This Family

Official ICD-10-CM classifications closest to T85.840D in its code family, with their registry titles.

View all codes in the T85 family