What is the ICD-10 code for acetaminophen allergy?

The ICD-10 code for an adverse effect of acetaminophen is T39.1X5A, paired with codes like T78.4XXA for unspecified allergy or T78.2XXA for anaphylactic shock.

How do you code an allergic reaction to acetaminophen?

Code the specific reaction (e.g., T78.4XXA for unspecified allergy) and pair it with T39.1X5A for the adverse effect of acetaminophen.

ICD-10 Coding for Acetaminophen Allergy(T39.1X5A, T39.1X, L50.0)

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Learn about the ICD-10 coding for acetaminophen allergy, including primary codes, documentation requirements, and common pitfalls.

Also known as:

Paracetamol AllergyTylenol Allergy

Related ICD-10 Code Ranges

Complete code families applicable to Acetaminophen Allergy

S00-T88Primary Range

Injury, poisoning and certain other consequences of external causes

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Code Comparison: When to Use Each Code

Compare key differences between these codes to ensure accurate selection

Code	Description	When to Use	Key Documentation
T39.1X5A	Adverse effect of 4-aminophenol derivatives (acetaminophen), initial encounter	Use when documenting an adverse effect of acetaminophen, such as an allergic reaction.	Documented adverse reaction following correct administration of acetaminophen
T78.2XXA	Anaphylactic shock, initial encounter	Use for anaphylactic reactions to acetaminophen.	Symptoms of anaphylaxis such as hypotension bronchospasm.
L50.0	Allergic urticaria	Use for urticaria reactions to acetaminophen.	Presence of hives following acetaminophen administration.

Primary ICD-10-CM Codes

Adverse effect of 4-Aminophenol derivatives, initial encounter

T39.1X5ABillable

Poisoning by, adverse effect of and underdosing of 4-Aminophenol derivatives

T39.1X

Differential Codes

Alternative codes to consider when ruling out similar conditions

Poisoning by 4-aminophenol derivatives, accidental (unintentional), initial encounterT39.1X

Use for accidental overdose, not for adverse effects from correct use.

Anaphylactic shock, initial encounterT78.2

Use for systemic reactions with hemodynamic instability.

Allergy, unspecified, initial encounterT78.4

Use for non-specific allergic reactions.

Urticaria, unspecifiedL50.9

Use when the cause of urticaria is not specified.

Documentation & Coding Risks

Avoid these common issues when documenting Acetaminophen Allergy.

Vague documentation of 'allergy'

Impact

Clinical: May lead to inappropriate treatment., Regulatory: Non-compliance with documentation standards., Financial: Potential claim denials due to insufficient detail.

Mitigation

Use specific terms like 'urticaria' or 'anaphylaxis'.

Using Z88.6 alone for acute reactions

Impact

Reimbursement: May lead to claim denials due to incomplete coding., Compliance: Non-compliance with ICD-10 coding guidelines., Data Quality: Inaccurate representation of patient condition.

Mitigation

Always pair with a reaction code and T39.1X5A.

Confusing adverse effect with poisoning

Impact

Reimbursement: Incorrect DRG assignment affecting reimbursement., Compliance: Potential audit issues for incorrect code usage., Data Quality: Misleading clinical data affecting patient care.

Mitigation

Use T39.1X5A for adverse effects, not poisoning codes.

Incomplete coding of allergic reactions

Impact

Failure to pair reaction codes with adverse effect codes.

Mitigation

Implement coding audits to ensure correct code combinations.

Frequently Asked Questions

Documentation requirements, coding pitfalls and FAQs for conditions coded with T39.1X5A.

Primary Code

T39.1X5A

Adverse effect of 4-Aminophenol derivatives, initial encounter

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ICD-10 codes8

Coding risks4

FAQs2

ICD-10 Coding for Acetaminophen Allergy(T39.1X5A, T39.1X, L50.0)

Documentation & Coding Risks

Frequently Asked Questions

What is the ICD-10 code for acetaminophen allergy?

How do you code an allergic reaction to acetaminophen?

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