T40.416 (Underdosing of fentanyl or fentanyl analogs) is an umbrella ICD-10-CM medical diagnosis code in the Injury, poisoning and certain other consequences of external causes chapter. It identifies cases of underdosing of fentanyl or fentanyl analogs for clinical documentation, billing and epidemiological tracking.

ICD-10-CM · Category

T40.416 - Underdosing of fentanyl or fentanyl analogs

Chapter S00-T88: Injury, poisoning and certain other consequences of external causes

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Sub-codes under T40.416

T40.416AUnderdosing of fentanyl or fentanyl analogs, initT40.416DUnderdosing of fentanyl or fentanyl analogs, subsT40.416SUnderdosing of fentanyl or fentanyl analogs, sequela

Related diagnoses

T40.411Poisoning by fentanyl or fentanyl analogs, accidentalT40.412Poisoning by fentanyl or fentanyl analogs, self-harmT40.413Poisoning by fentanyl or fentanyl analogs, assaultT40.414Poisoning by fentanyl or fentanyl analogs, undeterminedT40.415Adverse effect of fentanyl or fentanyl analogs

Common questions about T40.416 (Underdosing of fentanyl or fentanyl analogs)

What does ICD-10 code T40.416 mean?
T40.416 is the ICD-10-CM 2025 code for Underdosing of fentanyl or fentanyl analogs. ICD-10-CM is the medical coding system used by clinicians, hospitals and insurers in the United States to classify diseases and conditions in a standard way.
Is T40.416 a billable diagnosis code?
T40.416 is a category-level (umbrella) code rather than a billable specific code. For billing purposes, clinicians typically use a more specific sub-code under T40.416. Browse the sub-codes listed on this page.
Which ICD-10 chapter does T40.416 belong to?
T40.416 belongs to the chapter "Injury, poisoning and certain other consequences of external causes" (codes S00-T88). ICD-10-CM organises codes into 22 chapters by body system or condition type, which helps clinicians navigate related diagnoses.
Where can I get plain-language information about Underdosing of fentanyl or fentanyl analogs?
For a plain-language explanation of Underdosing of fentanyl or fentanyl analogs, ask GoDavaii's Health AI - it explains medical conditions in 90+ languages, free, with no signup. Tap "Ask GoDavaii AI about Underdosing of fentanyl or fentanyl analogs" above to get a personalised answer.

Source: ICD-10-CM 2025 (Centers for Medicare & Medicaid Services, public domain). Codes valid from October 1, 2024. CMS source ↗