Is L53.9 a billable ICD-10-CM code?

Yes. L53.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does L53.9 sit in the tabular list?

Diseases of the skin and subcutaneous tissue (L00-L99), in the block Urticaria and erythema (L49-L54).

What cannot be coded together with L53.9?

L53.9 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above L53.9 (L53) and apply to it just the same.

L53.9

L53.9 — Erythematous condition, unspecified

Billable / specific codeICD-10-CM

L53.9 is a billable, specific ICD-10-CM code for erythematous condition, unspecified. It is valid for submission on a claim.

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Erythema NOS
Erythroderma NOS

Excludes1 inherited from the categories above L53.9

These are not written on L53.9, but they bind it: a note on a category applies to every code beneath it. Billing L53.9 with anything listed here is a denial.

Written on L53 — Other erythematous conditions

erythema ab igne (L59.0)
erythema due to external agents in contact with skin (L23-L25)
erythema intertrigo (L30.4)

Risk adjustment

L53.9 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

L53.9 is named in 3 Medicare coverage policies — 3 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A57161Billing and Coding: Benign Skin Lesion Removal (Excludes Actinic Keratosis, and Mohs)
A57594Billing and Coding: Non-Invasive Peripheral Venous Vascular and Hemodialysis Access Studies
A57689Billing and Coding: Lab: Flow Cytometry

How L53.9 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to L53.9.

Erythema, erythematous(infectional) (inflammation)
Erythroderma(secondary)

Code history

L53.9 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share L53. If L53.9 is not quite right, the correct code is usually one of these.

Questions about L53.9

Is L53.9 a billable ICD-10-CM code?: Yes. L53.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does L53.9 sit in the tabular list?: Diseases of the skin and subcutaneous tissue (L00-L99), in the block Urticaria and erythema (L49-L54).
What cannot be coded together with L53.9?: L53.9 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above L53.9 (L53) and apply to it just the same.