S00.421

Billable
ChapterS00–T88
Ranksubcategory
Official Description

Blister (nonthermal) of right ear

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Billable/specific code (valid for reimbursement).
  • •Chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88).
General instructions are available for the parent sections:
View CH19 NotesView S00-S09 NotesView S00 Notes

Clinical Hierarchy

CH19Injury, poisoning and certain other consequences of external causes (S00-T88)
S00-S09Injuries to the head (S00-S09)
S00Superficial injury of head
S00.4Superficial injury of ear
S00.42Blister (nonthermal) of ear
S00.421Blister (nonthermal) of right ear

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to S00.421:

categoryS00
Superficial injury of head
View context instructions
blockS00-S09
Injuries to the head (S00-S09)
View context instructions
chapterCH19
Injury, poisoning and certain other consequences of external causes (S00-T88)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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