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T37.0X1 vs T37.0X2

T37.0X1 (Poisoning by sulfonamides, accidental (unintentional)) compared with T37.0X2 (Poisoning by sulfonamides, intentional self-harm), from the official CMS tabular data.

Summary

These codes name the same substance (Acedapsone) under a different circumstance of exposure, so the documented intent decides which one applies.

MedCoder-derived
What is different?

Title wording.The titles share “Poisoning by sulfonamides”; T37.0X1 says “accidental (unintentional)” where T37.0X2 says “intentional self-harm”.

Registry fact

Can these codes be reported together?

One column applies.T37.0X1 and T37.0X2 code the same substance (Acedapsone) with a different circumstance of exposure. From the CMS/CDC Table of Drugs and Chemicals: accidental poisoning, intentional self-harm, assault, undetermined intent, adverse effect and underdosing are mutually exclusive columns — only one of them applies to a given encounter.

MedCoder-derivedGuide: Poisoning vs adverse effect vs underdosing

Is there an Excludes1 relationship?

None.Neither entry carries an Excludes1 note that names the other code. T37.0X1 carries 4 Excludes1 notes and T37.0X2 carries 4 Excludes1 notes covering other codes; the side-by-side table quotes them.

Official rule

Is there an Excludes2 relationship?

None.Neither entry carries an Excludes2 note that names the other code. T37.0X1 carries 5 Excludes2 notes and T37.0X2 carries 5 Excludes2 notes covering other codes; the side-by-side table quotes them.

Official rule

Is one more specific?

No.Neither is a subdivision of the other, and neither title is the unspecified form; they describe different conditions within category T37.

Registry fact

Is one a parent or header code?

Both are headers.Both are non-billable headers, and neither contains the other.

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?

Yes.Same substance, different intent. T37.0X1 and T37.0X2 code the same substance (Acedapsone) with a different circumstance of exposure.

MedCoder-derivedGuide: Poisoning vs adverse effect vs underdosing

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.

Can these codes be reported together?

Informational

Drug table relationship

T37.0X1
Poisoning by sulfonamides, accidental (unintentional)
↔
T37.0X2
Poisoning by sulfonamides, intentional self-harm

What we found

Same substance, different intent.T37.0X1 and T37.0X2 code the same substance (Acedapsone) with a different circumstance of exposure.

From the CMS/CDC Table of Drugs and Chemicals: accidental poisoning, intentional self-harm, assault, undetermined intent, adverse effect and underdosing are mutually exclusive columns — only one of them applies to a given encounter.

What to review

Pick the column of the Table of Drugs and Chemicals that matches the documented circumstance of exposure.

Guide: Poisoning vs adverse effect vs underdosingCheck these on a claim

Why it matters

Accidental poisoning, intentional self-harm, assault, undetermined intent, adverse effect and underdosing are mutually exclusive columns — exactly one applies to a given encounter.

Source / rule

CMS Table of Drugs and Chemicals

Side by side

T37.0X1Poisoning by sulfonamides, accidental (unintentional)T37.0X2Poisoning by sulfonamides, intentional self-harm
Billing statusNon-billable header

Report instead: T37.0X1A, T37.0X1D, T37.0X1S

Non-billable header

Report instead: T37.0X2A, T37.0X2D, T37.0X2S

ClassificationS00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)
DefinitionPoisoning by sulfonamides, accidental (unintentional) is a non-billable ICD-10-CM category code (T37.0X1).Poisoning by sulfonamides, intentional self-harm is a non-billable ICD-10-CM category code (T37.0X2).
7th characterThe appropriate 7th character is to be added to each code from category T37The appropriate 7th character is to be added to each code from category T37
Includes
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
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
Excludes1
anti-infectives topically used for ear, nose and throat (T49.6-)
anti-infectives topically used for eye (T49.5-)
locally applied anti-infectives NEC (T49.0-)
toxic reaction to local anesthesia in pregnancy (O29.3-)
anti-infectives topically used for ear, nose and throat (T49.6-)
anti-infectives topically used for eye (T49.5-)
locally applied anti-infectives NEC (T49.0-)
toxic reaction to local anesthesia in pregnancy (O29.3-)
Excludes2
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)
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)
Code first
, for adverse effects, the nature of the adverse effect, such as:
adverse effect NOS (T88.7)
, for adverse effects, the nature of the adverse effect, such as:
adverse effect NOS (T88.7)
Use additional code
code(s) to specify:
manifestations of poisoning
underdosing or failure in dosage during medical and surgical care (Y63.6, Y63.8-Y63.9)
code(s) to specify:
manifestations of poisoning
underdosing or failure in dosage during medical and surgical care (Y63.6, Y63.8-Y63.9)

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.

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Derived from the official CMS ICD-10-CM tabular data (FY2026). A coding-rule comparison, not billing advice: payer-specific edits and medical-necessity policy are outside its scope. All data sources