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U.S. ICD-10-CM · FY 2027

L99 ICD-10-CM Code: Other disorders of skin and subcutaneous tissue in diseases classified elsewhere

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

Code definition

Official description

L99

Other disorders of skin and subcutaneous tissue in diseases classified elsewhere

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

Classification

Where L99 sits

  1. 1

    Chapter 12

    Diseases of the skin and subcutaneous tissue (L00-L99)

  2. 2

    Section

    Other disorders of the skin and subcutaneous tissue (L80-L99)

  3. 3

    Category L99

    Other disorders of skin and subcutaneous tissue in diseases classified elsewhere

  4. 4

    Code L99

    Other disorders of skin and subcutaneous tissue in diseases classified elsewhere

Documentation details

Notes for this code

Inclusion terms

No inclusion terms are listed for L99.

Code first

  • underlying disease, such as:
  • amyloidosis (E85.-)

Use additional code

No “use additional code” instruction is listed for L99.

Excludes1

Conditions that should not be reported together with this code.

  • skin disorders in diabetes (E08-E13 with .62-)
  • skin disorders in gonorrhea (A54.89)
  • skin disorders in syphilis (A51.31, A52.79)

Excludes2

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

No Excludes2 note is listed for L99.

Transparency

Source and release

Data release

U.S. ICD-10-CM · FY 2027

Effective date

Oct 1, 2026

Publisher

Vero Scribe Inc.

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 L99 mean?

L99 is the FY 2027 U.S. ICD-10-CM code for “Other disorders of skin and subcutaneous tissue in diseases classified elsewhere.”

Is L99 a billable or specific ICD-10-CM code?

Yes. In the FY 2027 reference data used on this page, L99 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 L99 located in ICD-10-CM?

L99 is listed in Chapter 12, Diseases of the skin and subcutaneous tissue (L00-L99), within Other disorders of the skin and subcutaneous tissue (L80-L99) (L80–L99), under category L99, Other disorders of skin and subcutaneous tissue in diseases classified elsewhere.

What coding notes are listed for L99?

No inclusion terms are listed for L99 in this reference record. Code-first instructions: underlying disease, such as:; amyloidosis (E85.-). Excludes1 notes: skin disorders in diabetes (E08-E13 with .62-); skin disorders in gonorrhea (A54.89); skin disorders in syphilis (A51.31, A52.79). No Excludes2 note is listed.

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