S90.466D Insect bite (nonvenomous), unspecified lesser toe(s), subsequent encounter

ICD-10-CM S90.466D: Insect bite (nonvenomous), unspecified lesser toe(s), subsequent encounter

ICD-10-CM code S90.466D identifies a nonvenomous insect bite of unspecified lesser toe(s) during a subsequent encounter. The code is active and billable, with a parent concept of S90.466. It is distinct from initial encounter and sequela variations, and its semantic type is Injury or Poisoning. 1 4 5

Plain-language overview

Code S90.466D describes a nonvenomous insect bite affecting unspecified lesser toes during a subsequent encounter, and its semantic type is classified as an Injury or Poisoning. 1

What this code represents

The official display label for S90.466D is Insect bite (nonvenomous), unspecified lesser toe(s), subsequent encounter, and the terminology record designates its status as active. 1

S90.466D is designated as a billable code, and its parent concept in the ICD-10-CM hierarchy is S90.466, which is the nonvenomous insect bite of unspecified lesser toe(s). 5 1

Coding details

S90.466D is listed alongside S90.466A for the initial encounter and S90.466S for sequela, representing different encounter phases for a nonvenomous insect bite of unspecified lesser toe(s). 4

The code S90.466D appears in a coding hierarchy with S90.464D for right lesser toe(s) and S90.465D for left lesser toe(s), both designated as subsequent encounters. 4

The NCI terminology record lists S90.466D for ICD-10-CM version 2026, while a separate CMS file lists numerical codes for various nonvenomous insect bites across different body sites. 1 2

Documentation considerations

The official label for S90.466D specifies an unspecified lesser toe(s) and a subsequent encounter, distinguishing it from codes specifying left or right toes or different encounter types. 1 4

What the sources add

The NCI terminology record confirms S90.466D is active for ICD-10-CM version 2026, while the Unbound Medicine source situates it among related initial, subsequent, and sequela codes for lesser toe bites. 1 4

A CMS billing article references a related nonvenomous insect bite code with a GZ modifier, illustrating how such codes appear in operational billing guidance, though S90.466D itself is not mentioned there. 3

Sources

1. ICD-10-CM S90.466D terminology record — National Cancer Institute Enterprise Vocabulary Services; accessed 2026-07-27.
2. cms32desclongdx-txt.txt — cms.gov; accessed 2026-07-27.
3. Article - Billing and Coding: Debridement Services (A56459) — cms.gov; accessed 2026-07-27.
4. ICD-10-CM 2024 | S90.4 - Other superficial injuries of toe — unboundmedicine.com; accessed 2026-07-27.
5. Codigo. The #1 Billing Agency for Medical Practices — codigo.care; accessed 2026-07-27.