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U.S. ICD-10-CM · FY 2027

S00.521D ICD-10-CM Code: Blister (nonthermal) of lip, subsequent encounter

A clear reference for the official code description, hierarchy, and related coding information from the FY 2027 U.S. release.

Code definition

Official description

S00.521D

Blister (nonthermal) of lip, subsequent encounter

ICD-10-CM diagnosis code · United States clinical modification

Classification

Where S00.521D sits

  1. 1

    Chapter 19

    Injury, poisoning and certain other consequences of external causes (S00-T88)

  2. 2

    Section

    Injuries to the head (S00-S09)

  3. 3

    Category S00

    Superficial injury of head

  4. 4

    Subcategory S00.521

    Blister (nonthermal) of lip

  5. 5

    Code S00.521D

    Blister (nonthermal) of lip, subsequent encounter

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for S00.521D.

Code first

No “code first” instruction is listed for S00.521D.

Use additional code

No “use additional code” instruction is listed for S00.521D.

Excludes1

Conditions that should not be reported together with this code.

No Excludes1 note is listed for S00.521D.

Excludes2

Conditions not included here that may be reported separately when present.

No Excludes2 note is listed for S00.521D.

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

This reference is generated from Vero’s ICD-10-CM description, hierarchy, and code-note dataset. The visible content and structured data share that source.

Review the CDC/NCHS ICD-10-CM source

Code-specific guidance

Frequently asked questions

What does ICD-10-CM code S00.521D mean?

S00.521D is the FY 2027 U.S. ICD-10-CM code for “Blister (nonthermal) of lip, subsequent encounter.”

Is S00.521D a billable or specific ICD-10-CM code?

Yes. In the FY 2027 reference data used on this page, S00.521D has no child codes and is presented as a billable/specific code. Always confirm the active code set and payer requirements before use.

Where is S00.521D located in ICD-10-CM?

S00.521D is listed in Chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88), within Injuries to the head (S00-S09) (S00–S09), under category S00, Superficial injury of head and subcategory S00.521, Blister (nonthermal) of lip.

What coding notes are listed for S00.521D?

No inclusion terms are listed for S00.521D in this reference record. No code-first instruction is listed. No Excludes1 note is listed. No Excludes2 note is listed.

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