T40.495

⚠ Non-billable (Header)

Adverse effect of other synthetic narcotics

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.

Check This Code

⚠️ 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)

T40.495AAdverse effect of other synthetic narcotics, initial encounter✓ Billable T40.495DAdverse effect of other synthetic narcotics, subsequent encounter✓ Billable T40.495SAdverse effect of other synthetic narcotics, sequela✓ Billable

Clinical Description

ICD-10-CM code T40.495 represents adverse effect of other synthetic narcotics. 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 T40.495.

Frequently Asked Questions

What is ICD-10 code T40.495?

ICD-10-CM code T40.495 is "Adverse effect of other synthetic narcotics". It belongs to the category: Injury, poisoning and certain other consequences of external causes (S00-T88).

Is T40.495 a billable ICD-10 code?

No, T40.495 is a non-billable header code. A more specific child code must be used for billing.

Can T40.495 be coded with other codes?

T40.495 has 1 Excludes2 note(s). These conditions can be coded together if both are documented in the patient record.

Related Codes in T40.49

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

T40.491Poisoning by other synthetic narcotics, accidental (unintentional)T40.492Poisoning by other synthetic narcotics, intentional self-harm T40.493Poisoning by other synthetic narcotics, assault T40.494Poisoning by other synthetic narcotics, undetermined T40.496Underdosing of other synthetic narcotics

🧪 Validate Combinations

Add T40.495 to the Excludes Checker to validate against your full code list.

Open in Checker →

Code Information

CodeT40.495

BillableNo — Header code

ParentT40.49

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)