T40.426 (Underdosing of tramadol) 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 tramadol for clinical documentation, billing and epidemiological tracking.

ICD-10-CM · Category

T40.426 - Underdosing of tramadol

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

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Sub-codes under T40.426

T40.426AUnderdosing of tramadol, initial encounterT40.426DUnderdosing of tramadol, subsequent encounterT40.426SUnderdosing of tramadol, sequela

Related diagnoses

T40.421Poisoning by tramadol, accidental (unintentional)T40.422Poisoning by tramadol, intentional self-harmT40.423Poisoning by tramadol, assaultT40.424Poisoning by tramadol, undeterminedT40.425Adverse effect of tramadol

Common questions about T40.426 (Underdosing of tramadol)

What does ICD-10 code T40.426 mean?
T40.426 is the ICD-10-CM 2025 code for Underdosing of tramadol. 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 T40.426 a billable diagnosis code?
T40.426 is a category-level (umbrella) code rather than a billable specific code. For billing purposes, clinicians typically use a more specific sub-code under T40.426. Browse the sub-codes listed on this page.
Which ICD-10 chapter does T40.426 belong to?
T40.426 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 tramadol?
For a plain-language explanation of Underdosing of tramadol, ask GoDavaii's Health AI - it explains medical conditions in 90+ languages, free, with no signup. Tap "Ask GoDavaii AI about Underdosing of tramadol" 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 ↗