ICD-10 Code S40.822A - Blister (nonthermal) of left upper arm, initial encounter

ICD-10-CM Diagnosis Code S40.822A

Diagnosis Code: S40.822A (Raw: S40822A)

Description: Blister (nonthermal) of left upper arm, initial encounter

Classification: International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM)

Fiscal Year: 2026

CMS Section 111 Status: Valid for reporting.

Overview & Clinical Details

ICD-10-CM code S40.822A is designated for Blister (nonthermal) of left upper arm, initial encounter. In medical documentation and insurance billing, this code is utilized to specify medical diagnosis for patient records, reimbursement workflows, and compliance under CMS Section 111 mandatory insurer reporting guidelines.