S00.422 (Blister (nonthermal) of left ear) is an umbrella ICD-10-CM medical diagnosis code in the Injury, poisoning and certain other consequences of external causes chapter. It identifies cases of blister (nonthermal) of left ear for clinical documentation, billing and epidemiological tracking.

ICD-10-CM · Category

S00.422 — Blister (nonthermal) of left ear

Chapter S00-T88: Injury, poisoning and certain other consequences of external causes

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Sub-codes under S00.422

S00.422ABlister (nonthermal) of left ear, initial encounterS00.422DBlister (nonthermal) of left ear, subsequent encounterS00.422SBlister (nonthermal) of left ear, sequela

Related diagnoses

S00.421Blister (nonthermal) of right earS00.429Blister (nonthermal) of unspecified ear

Common questions about S00.422 (Blister (nonthermal) of left ear)

What does ICD-10 code S00.422 mean?
S00.422 is the ICD-10-CM 2025 code for Blister (nonthermal) of left ear. ICD-10-CM is the medical coding system used by clinicians, hospitals and insurers worldwide to classify diseases and conditions in a standard way.
Is S00.422 a billable diagnosis code?
S00.422 is a category-level (umbrella) code rather than a billable specific code. For billing purposes, clinicians typically use a more specific sub-code under S00.422. Browse the sub-codes listed on this page.
Which ICD-10 chapter does S00.422 belong to?
S00.422 belongs to the chapter "Injury, poisoning and certain other consequences of external causes" (codes S00-T88). ICD-10-CM organises codes into 22 chapters by body system or condition type, which helps clinicians navigate related diagnoses.
Where can I get plain-language information about Blister (nonthermal) of left ear?
For a plain-language explanation of Blister (nonthermal) of left ear, ask GoDavaii's Health AI - it explains medical conditions in 22+ Indian languages, free, with no signup. Tap "Ask GoDavaii AI about Blister (nonthermal) of left ear" above to get a personalised answer.

Source: ICD-10-CM 2025 (Centers for Medicare & Medicaid Services, public domain). Codes valid from October 1, 2024. CMS source ↗