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T56.82 ICD-10-CM Code: Toxic effect of gadolinium

Compare with another codeCheck this code on a claim

Billing Status: NO. This is a non-billable ICD-10-CM code: report a more specific billable code beneath it.

Coding at a Glance

7th character
Required — see the character table on this page
Tabular directives
2 inclusion terms · 4 Excludes1 · 5 use-additional codes

Not billable · FY2027A non-billable heading in the tabular list: report a more specific code beneath it.

What you need to know

Source: CMS/NCHS Official ICD-10-CM tabular notes, quoted. From the CMS/NCHS tabular list for the release in force. A note the category or block publishes applies to this code too; the Instructions section marks which is which.

Use additional codeReport with this code when documented
  • code to identify any retained metal foreign body, if applicable (Z18.0-, T18.1-)
  • code(s):
  • for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70)
  • personal history of foreign body fully removed (Z87.821)

+1 more in Instructions

Excludes1Never report with this code
  • adverse effect of diagnostic agents (T50.8X5-)
  • arsenic and its compounds (T57.0)
  • manganese and its compounds (T57.2)
  • contact with and (suspected) exposure to toxic substances (Z77.-)
IncludesWhat this code covers
  • toxic effects of fumes and vapors of metals
  • toxic effects of metals from all sources, except medicinal substances

Most relevant related codes MedCoder-derived

Read off the official notes above and this code’s own position in the tabular list. Which to report is a documentation question; Compare shows the two side by side.

CompareCheck ClaimView Related Codes

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for T56.82 in the official ICD-10-CM tabular list, quoted as published.

Source: CMS/CDC — ICD-10-CM Tabular ListRelease: FY2027Effective: October 1, 2026

Trace:FY2027 changesChange historyRelease, file and checksum

Notes without a marker are published on T56.82 itself; “inherited from” names the category or block whose note applies here.

Includes

Conditions the official ICD-10-CM tabular list includes under this code.

  • toxic effects of fumes and vapors of metals
  • toxic effects of metals from all sources, except medicinal substances

Source: inherited from T56

Excludes1 — Not Coded Here

Conditions generally not reported together with this code (Excludes1) -- an error unless the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Use Additional Code

Supplementary codes the tabular list directs you to add.

  • Use additional code to identify any retained metal foreign body, if applicable (Z18.0-, T18.1-) inherited from T56
  • Use additional code(s):
  • for all associated manifestations of toxic effect, such as: respiratory conditions due to external agents (J60-J70) inherited from T51-T65
  • personal history of foreign body fully removed (Z87.821) inherited from T51-T65
  • to identify any retained foreign body, if applicable (Z18.-) inherited from T51-T65

7th Character Guide

"The appropriate 7th character is to be added to each code from category T56"

  • A — initial encounter
  • D — subsequent encounter
  • 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

T56.821A, T56.821D, T56.821S, T56.822A, T56.822D, T56.822S, T56.823A, T56.823D

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 T56.82

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

Before you code T56.82

  1. T56.82 is not reportable as written. Select the more specific code beneath it that the documentation supports. Codes are reported to the highest level of specificity the classification provides (Guidelines I.B.2).

    ReviewT56.821, T56.822, T56.823, T56.824

    See the relationships section · Guide: How to choose an ICD-10-CM code →

  2. A 7th character is required in this family. Confirm the documented encounter: initial (active treatment), subsequent (healing or recovery phase), or sequela. T56.82 is not valid without one. “Initial” means active treatment, not the first visit (Guidelines I.C.19.a).

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

  3. Confirm whether the documentation describes a poisoning, an adverse effect of a correctly prescribed and administered drug, an underdosing, or a toxic effect, and the intent where the record states it: the Table of Drugs and Chemicals separates these by column, and the sequencing differs for each. Poisoning, adverse effect and underdosing guidelines (Guidelines I.C.19.e).

    See the Table of Drugs and Chemicals entries · Guide: Poisoning vs adverse effect vs underdosing →

  4. Check the Excludes1 note: if the documentation supports a condition named there, do not simply proceed with T56.82. Excludes1 conditions are not reported together with this code unless the record shows they are unrelated (Guidelines I.A.12.a).

    See the official tabular notes

Choose the right path

  1. Does the documentation support one of the more specific codes beneath T56.82?
    Yes → Select that code and continue the checks below on its own page.
    No → T56.82 cannot be reported as written; query for the specificity its subcategory needs.

    ReviewT56.821, T56.822, T56.823, T56.824

  2. Does the documentation support a condition named in T56.82’s Excludes1 note?
    Yes → Do not simply proceed: review the excluded code. Both are reported only when the record shows the two conditions are unrelated.
    No → Continue.

    ReviewT50.8X5, T57.0, T57.2, Z77

  3. 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 T56.82. 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 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.
External cause, place and activity
For the external cause codes reported with the injury or poisoning, where documented (Guidelines I.C.20.a).

Official instructions as workflow

  • Excludes1 — check before selecting T56.82(4 notes)

    Coding workflow: If the documentation supports a condition named in this note, do not simply proceed with T56.82: the two are not reported together. The one exception is when the record shows the two conditions are unrelated to each other.

    CompareT50.8X5, T57.0, T57.2, Z77

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

  • Use Additional Code — after identifying T56.82(5 notes)

    Coding workflow: Check whether the documentation supports the additional code(s) the note names, and report them with T56.82 when it does. Where the instruction is conditional (“if applicable”, “if known”), it applies only when the record documents the condition.

    ReviewZ18.0, T18.1, Z87.821, Z18

    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: Both the condition T56.82 describes and a condition named in its Excludes1 note are documented for the same encounter.

Coding question: Can both codes be reported?

Path: Review the Excludes1 note and the excluded code, and look for a provider statement on whether the two conditions are related.

Reason: Excludes1 means the two are not coded together; the exception is when the record shows the conditions are unrelated to each other (Guidelines I.A.12.a).

ReviewT50.8X5, T57.0, T57.2, Z77

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

Coding question: Is a second code reported with T56.82?

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).

ReviewZ18.0, T18.1, Z87.821, Z18

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.

Coding context

The comparisons, hierarchy, index entries, guidelines, relationships, risk-adjustment and coverage context a coder commonly needs. Each section names whether it is official source data, a MedCoder-derived relationship or MedCoder editorial.

Don’t confuse T56.82 with…

MedCoder analysis — pairs from this code’s official notes, distinctions written by MedCoder

The codes most likely to be picked instead of T56.82 — named in its own official notes, or sharing its laterality or encounter family — with what separates them and which documentation moves the case. Each links to the full comparison.

  • T50.8X5— Excludes1 conflict (Excludes1 — generally not reported together)

    Not coded here — the tabular list excludes this pair for the same encounter.

    Not reported together with this code, except where the two conditions are documented as unrelated.

    What moves you there: Documentation of adverse effect of diagnostic agents moves the case to T50.8X5; the two are not reported together unless documented as unrelated.

    Full comparison: T56.82 vs T50.8X5 →

  • T57.0— Excludes1 conflict (Excludes1 — generally not reported together)

    Not coded here — the tabular list excludes this pair for the same encounter.

    Not reported together with this code, except where the two conditions are documented as unrelated.

    What moves you there: Documentation of arsenic and its compounds moves the case to T57.0; the two are not reported together unless documented as unrelated.

    Full comparison: T56.82 vs T57.0 →

  • T57.2— Excludes1 conflict (Excludes1 — generally not reported together)

    Not coded here — the tabular list excludes this pair for the same encounter.

    Not reported together with this code, except where the two conditions are documented as unrelated.

    What moves you there: Documentation of manganese and its compounds moves the case to T57.2; the two are not reported together unless documented as unrelated.

    Full comparison: T56.82 vs T57.2 →

  • Z77— Excludes1 conflict (Excludes1 — generally not reported together)

    Not coded here — the tabular list excludes this pair for the same encounter.

    Not reported together with this code, except where the two conditions are documented as unrelated.

    What moves you there: Documentation of contact with and (suspected) exposure to toxic substances moves the case to Z77; the two are not reported together unless documented as unrelated.

    Full comparison: T56.82 vs Z77 →

  • T56.821A— Encounter relationship (Review)

    Same underlying diagnosis, different encounter phase.

    The same diagnosis at a different phase of care; one encounter takes one 7th character.

    What moves you there: Documentation of a initial encounter moves the case to T56.821A.

    Full comparison: T56.82 vs T56.821A →

  • T56.821D— Encounter relationship (Review)

    Same underlying diagnosis, different encounter phase.

    The same diagnosis at a different phase of care; one encounter takes one 7th character.

    What moves you there: Documentation of a subsequent encounter moves the case to T56.821D.

    Full comparison: T56.82 vs T56.821D →

Relationships are read from this code's own official notes, its laterality siblings and its encounter family; the wording of each distinction is MedCoder editorial, and the documentation named in each “what moves you there” line is the official note phrase or sibling title itself. Source: CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a.

Code Overview

Toxic effect of gadolinium is a non-billable ICD-10-CM category code (T56.82). A more specific billable subcode must be selected for claims submission.

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

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. 5 Use Additional Code instructions — report the named additional code(s) when the documentation supports them. See the Use Additional Code notes
  3. 4 Excludes1 entries — codes named there are generally not reported together with this code (Guidelines I.A.12.a). See the Excludes1 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

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-derived relationships — computed from published CMS and AHRQ datasets

Other codes that name T56.82 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 1 Excludes1 note: R78.72 — Abnormal gadolinium level in blood.

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

Referenced by 11 Excludes2 notes across 2 chapters: T80 — Complications following infusion, transfusion and therapeutic injection (via T56.-), T80-T88 — Complications of surgical and medical care, not elsewhere classified (T80-T88) (via T56.-), T81 — Complications of procedures, not elsewhere classified (via T56.-), T82 — Complications of cardiac and vascular prosthetic devices, implants and grafts (via T56.-), T83 — Complications of genitourinary prosthetic devices, implants and grafts (via T56.-), T84 — Complications of internal orthopedic prosthetic devices, implants and grafts (via T56.-), T85 — Complications of other internal prosthetic devices, implants and grafts (via T56.-), T86 — Complications of transplanted organs and tissue (via T56.-), T87 — Complications peculiar to reattachment and amputation (via T56.-), T88 — Other complications of surgical and medical care, not elsewhere classified (via T56.-), Z77 — Other contact with and (suspected) exposures hazardous to health (via T56.-).

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

Referenced by 68 Code First instructions across 14 chapters: D61.2 — Aplastic anemia due to other external agents (via T56.-), D64.2 — Secondary sideroblastic anemia due to drugs and toxins (via T56.-), E03.2 — Hypothyroidism due to medicaments and other exogenous substances (via T56.-), E09 — Drug or chemical induced diabetes mellitus (via T56.-), F02 — Dementia in other diseases classified elsewhere (via T56.-), G21.2 — Secondary parkinsonism due to other external agents (via T56.-), G62.2 — Polyneuropathy due to other toxic agents (via T56.-), G70.1 — Toxic myoneural disorders (via T56.-), G72.2 — Myopathy due to other toxic agents (via T56.-), G92.8 — Other toxic encephalopathy (via T56.-), G92.9 — Unspecified toxic encephalopathy (via T56.-), H10.21 — Acute toxic conjunctivitis (via T56.-), H35.38 — Toxic maculopathy (via T56.-), H46.3 — Toxic optic neuropathy (via T56.-), H91.0 — Ototoxic hearing loss (via T56.-), I42.7 — Cardiomyopathy due to drug and external agent (via T56.-), J68 — Respiratory conditions due to inhalation of chemicals, gases, fumes and vapors (via T56.-), J69.1 — Pneumonitis due to inhalation of oils and essences (via T56.-), J69.8 — Pneumonitis due to inhalation of other solids and liquids (via T56.-), J70.8 — Respiratory conditions due to other specified external agents (via T56.-), +48 more.

Each of these codes carries a Code First note naming this condition — when that code is reported, THIS code is sequenced first, ahead of it.

Contextual Map

Every relationship of T56.82 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 T56.82 with these 18 related codes in Claim Check

Hierarchy

Excludes1

Referenced by Excludes1 notes

Referenced by Excludes2 notes (11)

Referenced by Code First instructions (68)

Nearest codes (40)

Change history

Deep reference

Published questions and FAQ, every source behind this page with its release and checksum, the date-of-service check and the complete change history.

Common coding questions

MedCoder editorial

Can T56.82 be billed directly?

No. T56.82 (Toxic effect of gadolinium) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.

Does T56.82 require a 7th character?

Yes. The appropriate 7th character is to be added to each code from category T56.

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 FY2027 tabular list, index and tables, effective October 1, 2026 Release, file and checksum · Publisher’s page
Claim edits Official source data
CMS Definitions of Medicare Code Edits — v44.0 (October 2026) 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-derived 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 editorial 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.

Current data releases:ICD-10-CM FY2027 · ICD-10-PCS FY2027 · HCPCS October 2026 · MS-DRG v44 · Medicare Code Editor v44.0 · NCCI PTP Q4 2026 · MUE Q4 2026 · NCD code lists 2026-01 · LCD export September 20, 2026 · All releases and sources

Labels on this page: Official source data · MedCoder-derived relationship · MedCoder editorial explanation. How to read the labels · All data sources and release dates · CMS coding rules

Cite this page

Reference this page in a research guide, syllabus or article. The release is included because code content changes each year.

MedCoder.ai. "T56.82 — Toxic effect of gadolinium." ICD-10-CM FY2027. https://medcoder.ai/icd10/code/t56.82-toxic-effect-of-gadolinium

Change history

  • FY2024 — October 1, 2023
    Added to the code set
    Toxic effect of gadolinium
    FY2024 changes

Nearest Codes in This Family

Official ICD-10-CM classifications closest to T56.82 in its code family, with their registry titles.

View all codes in the T56 family