T40.721

⚠ Non-billable (Header)

Poisoning by synthetic cannabinoids, accidental (unintentional)

Injury, poisoning and certain other consequences of external causes (S00-T88)

⚠️ This is a category header code — not billable. Use a more specific child code below.

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⚠️ Excludes2

inherited

Rules inherited from parent codes.

T40

• drug dependence and related mental and behavioral disorders due to psychoactive substance use (F10.-F19.-)

Child Codes (3)

T40.721APoisoning by synthetic cannabinoids, accidental (unintentional), initial encounter✓ Billable T40.721DPoisoning by synthetic cannabinoids, accidental (unintentional), subsequent encounter✓ Billable T40.721SPoisoning by synthetic cannabinoids, accidental (unintentional), sequela✓ Billable

Clinical Description

ICD-10-CM code T40.721 represents poisoning by synthetic cannabinoids, accidental (unintentional). This code falls under the Injury, poisoning and certain other consequences of external causes (S00-T88) classification. It is a non-billable category header code. A more specific child code from the list below must be used for billing and reimbursement purposes.

This is a 7-character code at the 6th level of specificity. There are 3 more specific child codes under T40.721.

Frequently Asked Questions

What is ICD-10 code T40.721?

ICD-10-CM code T40.721 is "Poisoning by synthetic cannabinoids, accidental (unintentional)". It belongs to the category: Injury, poisoning and certain other consequences of external causes (S00-T88).

Is T40.721 a billable ICD-10 code?

No, T40.721 is a non-billable header code. A more specific child code must be used for billing.

Can T40.721 be coded with other codes?

T40.721 has 1 Excludes2 note(s). These conditions can be coded together if both are documented in the patient record.

Related Codes in T40.72

Other codes in the same category that may be relevant for differential coding:

T40.722Poisoning by synthetic cannabinoids, intentional self-harm T40.723Poisoning by synthetic cannabinoids, assault T40.724Poisoning by synthetic cannabinoids, undetermined T40.725Adverse effect of synthetic cannabinoids T40.726Underdosing of synthetic cannabinoids

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Code Information

CodeT40.721

BillableNo — Header code

ParentT40.72

CategoryInjury, poisoning and certain other consequences of external causes (S00-T88)

Excludes10 rule(s)

Excludes21 note(s)

Child codes3

Data Source

CMS ICD-10-CM 2026 Tabular List

Updated October 1, 2025 (FY2026)