T63.811S Toxic effect of contact with venomous frog, accidental (unintentional), sequela

ICD-10-CM T63.811S: Toxic effect of contact with venomous frog, accidental (unintentional), sequela

ICD-10-CM code T63.811S represents the sequela of an accidental toxic effect from contact with a venomous frog. The terminology record classifies this active diagnosis concept under the broader parent code T63.811, assigning it the semantic type of Injury or Poisoning for version 2026. 1

Plain-language overview

This diagnosis code identifies a patient experiencing a sequela following an accidental toxic exposure from contacting a venomous frog, based on its official terminology record. 1

What this code represents

The official display label for T63.811S is Toxic effect of contact with venomous frog, accidental (unintentional), sequela, and the terminology record indicates an active status. 1

The semantic type assigned to this specific code is Injury or Poisoning, and it exists as a narrower concept under the parent code T63.811 in the ICD-10-CM version 2026 terminology. 1

Coding details

The code T63.811S appears in a billing and coding article for allergy skin testing, specifically listed alongside the subsequent encounter descriptor for this toxic effect. 3

A separate billing and coding article for RAST type tests lists the initial encounter code T63.812A and mentions an intentional toxic effect, distinguishing these from the target sequela code. 4

Documentation considerations

The official terminology record designates T63.811S as a sequela, providing a specific classification for documenting the late effects of an accidental venomous frog contact. 1

What the sources add

While the terminology record defines the code structure and semantic type, the Medicare billing articles provide operational context by listing this diagnosis within allergy and testing service policies. 1 3

Comparing the sources reveals that the terminology record provides the authoritative code definition, whereas the Medicare billing articles demonstrate the code appearing in payer billing documents. 1 3 4

Coverage and utilization context

The appearance of T63.811S in a payer billing article for allergy skin testing establishes its administrative inclusion in that specific policy document. 3

Sources

1. ICD-10-CM T63.811S terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. Bookshelf — ncbi.nlm.nih.gov; accessed 2026-07-27.
3. Article - Billing and Coding: Allergy Skin Testing (A56559) — cms.gov; accessed 2026-07-27.
4. Article - Billing and Coding: RAST Type Tests (A57043) — cms.gov; accessed 2026-07-27.