S00.521A
BillableBlister (nonthermal) of lip, initial encounter
S00.521A is the ICD-10-CM code for Blister (nonthermal) of lip, initial encounter. It is a billable, specific code valid for reimbursement.
S00-T88 Injury, poisoning and certain other consequences of external causes
What this means — in plain language
MedlinePlus · NIHWhat are blisters? Blisters are fluid-filled sacs on the outer layer of your skin. They form because of rubbing, heat, or diseases of the skin. They are most common on your hands and feet. Other names for blisters are vesicles (usually for smaller blisters) and bulla (for larger blisters). What causes blisters? Blisters often happen when there is friction - rubbing or pressure - on one spot. For example, if your…
Read more about Blisters at MedlinePlus ↗Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.
Frequently asked questions
- What is ICD-10 code S00.521A?
- S00.521A is the ICD-10-CM code for "Blister (nonthermal) of lip, initial encounter". It falls under S00-T88 Injury, poisoning and certain other consequences of external causes.
- Is S00.521A a billable code?
- Yes — S00.521A is a billable, specific ICD-10-CM code valid for reimbursement.
Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.
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