Skip to main content

T50.8X5 vs T56.822D

T50.8X5 (Adverse effect of diagnostic agents) compared with T56.822D (Toxic effect of gadolinium, intentional self-harm, subsequent encounter), from the official CMS tabular data.

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 28, 2026 · All releases and sources

Summary

These codes should not be reported together because T56.822D’s tabular entry lists T50.8X5 under Excludes1.

Official rule
What is different?

The conditions named and billing status.T50.8X5 is “Adverse effect of diagnostic agents”; T56.822D is “Toxic effect of gadolinium, intentional self-harm, subsequent encounter”. T50.8X5 is a non-billable header; T56.822D is billable.

Registry fact

Can these codes be reported together?

No.T56.822D’s entry carries an Excludes1 note covering T50.8X5: “adverse effect of diagnostic agents (T50.8X5-)”. Both may be reported only when the documentation shows the two conditions are unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Official ruleGuide: Excludes1 vs Excludes2

Is there an Excludes1 relationship?

Yes.T56.822D’s tabular entry: “adverse effect of diagnostic agents (T50.8X5-)”. The note covers T50.8X5.

Official ruleGuide: Excludes1 vs Excludes2

Is there an Excludes2 relationship?

None.Neither entry carries an Excludes2 note that names the other code. T50.8X5 carries 5 Excludes2 notes covering other codes; the side-by-side table quotes them.

Official rule

Is one more specific?

Not comparable.The codes sit in different categories; specificity is only comparable within one category.

Is one a parent or header code?

One is a header.T50.8X5 is a non-billable header, but T56.822D is not one of its subdivisions.

Registry fact

Are there sequencing instructions?

None.Neither entry carries a Code First or Use Additional Code note that names the other.

Official rule

Are there other coding relationships?

None found.No laterality, encounter-phase, Table of Neoplasms, Table of Drugs and Chemicals, or history-versus-active-disease relationship links these codes.

MedCoder-derived

Official rule: a tabular instructional note or a section of the ICD-10-CM Official Guidelines, quoted as published. Registry fact: the codes’ own published attributes (titles, billable status, position in the hierarchy, code set). MedCoder-derived: a reading MedCoder computes from those facts; it is not itself a rule. How to read the labels

Can these codes be reported together?

Excludes1 — generally not reported together

Excludes1 conflict

T56.822D
Toxic effect of gadolinium, intentional self-harm, subsequent encounter
↔
T50.8X5
Adverse effect of diagnostic agents

What we found

No — do not report together.T56.822D carries an Excludes1 note covering T50.8X5: “adverse effect of diagnostic agents (T50.8X5-)”

Sole exception: when the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

What to review

Report one of the two. Both may be reported only when the documentation shows the two conditions are unrelated to each other.

Guide: Excludes1 vs Excludes2Check these on a claim

Why it matters

An Excludes1 note means the two conditions are not ordinarily reported together for the same encounter, because the classification treats them as mutually exclusive forms of the same condition. The documented exception is when the two conditions are unrelated to each other.

Source / rule

CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a

Official guidance behind these answers

  • Section I.A.12.a — Excludes1 · applies to: Excludes1

    A type 1 Excludes note is a pure excludes note. It means “NOT CODED HERE!” An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition. An exception to the Excludes1 definition is the circumstance when the two conditions are unrelated to each other. If it is not clear whether the two conditions involving an Excludes1 note are related or not, query the provider. For example, code F45.8, Other somatoform disorders, has an Excludes1 note for "sleep related teeth grinding (G47.63)," because "teeth grinding" is an inclusion term under F45.8. Only one of these two codes should be assigned for teeth grinding. However psychogenic dysmenorrhea is also an inclusion term under F45.8, and a patient could have both this condition and sleep related teeth grinding. In this case, the two conditions are clearly unrelated to each other, and so it would be appropriate to report F45.8 and G47.63 together.

    ICD-10-CM Official Guidelines FY2027

Quoted from the ICD-10-CM Official Guidelines for Coding and Reporting in effect for the release shown. The tabular notes above are the code-level instruction; these sections are the convention that says how such a note is applied. Source document (CMS PDF) · Release and checksum

Side by side

Similar descriptions do not make codes interchangeable. The documentation and the official instructions decide which code applies.

Official descriptionDiffers
T50.8X5

Adverse effect of diagnostic agents

T56.822D

Toxic effect of gadolinium, intentional self-harm, subsequent encounter

StatusDiffers
T50.8X5
Non-billable header

A header is not reported on a claim; a code beneath it is.

Report instead: T50.8X5A, T50.8X5D, T50.8X5S

T56.822D
Billable
Excludes1Differs
T50.8X5
  • toxic reaction to local anesthesia in pregnancy (O29.3-)
T56.822D
  • 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.-)
Excludes2Differs
T50.8X5
  • abuse and dependence of psychoactive substances (F10-F19)
  • abuse of non-dependence-producing substances (F55.-)
  • immunodeficiency due to drugs (D84.821)
  • drug reaction and poisoning affecting newborn (P00-P96)
  • pathological drug intoxication (inebriation) (F10-F19)
T56.822D

None at this code

Code firstDiffers
T50.8X5
  • , for adverse effects, the nature of the adverse effect, such as:
  • adverse effect NOS (T88.7)
T56.822D

None at this code

Use additional codeDiffers
T50.8X5
  • code(s) to specify:
  • manifestations of poisoning
  • underdosing or failure in dosage during medical and surgical care (Y63.6, Y63.8-Y63.9)
T56.822D
  • 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)
CategoryDiffers
T50.8X5

T50 Poisoning by, adverse effect of and underdosing of diuretics and other and unspecified drugs, medicaments and biological substances

T56.822D

T56 Toxic effect of metals

ChapterSame for both

S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)

IncludesDiffers
T50.8X5
  • adverse effect of correct substance properly administered
  • poisoning by overdose of substance
  • poisoning by wrong substance given or taken in error
  • underdosing by (inadvertently) (deliberately) taking less substance than prescribed or instructed
T56.822D
  • toxic effects of fumes and vapors of metals
  • toxic effects of metals from all sources, except medicinal substances
7th characterDiffers
T50.8X5
  • The appropriate 7th character is to be added to each code from category T50
T56.822D
  • The appropriate 7th character is to be added to each code from category T56

No Code also note at either code.

Notes are the code’s own tabular entry, quoted as published. A note that names the other code is the one the verdict above rests on. In a row that differs, notes every code shares are dimmed.

Edit this comparisonCheck a whole claim

Derived from the official CMS ICD-10-CM tabular data (FY2027). A coding-rule comparison, not billing advice: payer-specific edits and medical-necessity policy are outside its scope. All data sources