T39.8X1D Poisoning by other nonopioid analgesics and antipyretics, not elsewhere classified, accidental (unintentional), subsequent encounter

ICD-10-CM T39.8X1D: Poisoning by other nonopioid analgesics and antipyretics, accidental, subsequent encounter

ICD-10-CM code T39.8X1D represents an accidental poisoning by other nonopioid analgesics and antipyretics, not elsewhere classified, for a subsequent encounter. This code is an active terminology concept used to classify a specific type of injury or poisoning event during the recovery phase after active treatment has ended. 1 3

Plain-language overview

Code T39.8X1D is an active ICD-10-CM diagnosis concept representing an accidental poisoning by other nonopioid analgesics and antipyretics, not elsewhere classified, during a subsequent healthcare encounter. 1

What this code represents

The semantic type for T39.8X1D is Injury or Poisoning, and its parent concept is T39.8X1, which classifies the same accidental poisoning without specifying the subsequent encounter. 1

The seventh character D identifies a subsequent encounter, indicating the patient is receiving routine care during the healing or recovery phase after the active treatment for the poisoning has ended. 3

Coding details

In ICD-10-CM, the intent of a drug poisoning is generally captured in the sixth character of the code, distinguishing unintentional events from intentional self-harm, assault, or undetermined intent. 3

If the intent of an injury or poisoning cause is unknown or unspecified, official coding guidelines state the intent should be coded as unintentional rather than using undetermined intent codes. 3

Documentation considerations

To accurately select a subsequent encounter code, documentation must establish that the patient is receiving routine care during the healing or recovery phase rather than active treatment for the poisoning. 3

What the sources add

While the National Cancer Institute terminology record defines T39.8X1D as an active concept, the National Health Statistics Reports provide operational context for how seventh characters distinguish encounter phases. 1 3

The Value Set Authority Center lists T39.8X1D alongside its official title, whereas the National Cancer Institute record establishes its preferred name, parent hierarchy, and active status within the ICD-10-CM system. 4 1

Coverage and utilization context

A Centers for Medicare and Medicaid Services billing article lists related but distinct codes, such as the initial encounter for an adverse effect of other nonopioid analgesics, but does not define coverage for T39.8X1D. 5

Sources

1. ICD-10-CM T39.8X1D terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. State Unintentional Drug Overdose Reporting System ( ... — cdc.gov; accessed 2026-07-27.
3. National Health Statistics Reports — cdc.gov; accessed 2026-07-27.
4. Browse Code Systems — vsac.nlm.nih.gov; accessed 2026-07-27.
5. Article - Billing and Coding: RAST Type Tests (A57043) — cms.gov; accessed 2026-07-27.
6. Article - Billing and Coding: Oximetry Services (A57205) — cms.gov; accessed 2026-07-27.