Is L23.9 a billable ICD-10-CM code?

Yes. L23.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does L23.9 sit in the tabular list?

Diseases of the skin and subcutaneous tissue (L00-L99), in the block Dermatitis and eczema (L20-L30).

L23.9

L23.9 — Allergic contact dermatitis, unspecified cause

Billable / specific codeICD-10-CM

L23.9 is a billable, specific ICD-10-CM code for allergic contact dermatitis, unspecified cause. It is valid for submission on a claim.

Inclusion terms

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

Allergic contact eczema NOS

Risk adjustment

L23.9 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

L23.9 is named in 5 Medicare coverage policies — 5 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A56558Billing and Coding: Allergy Testing
A57473Billing and Coding: Allergy Testing
A57473Billing and Coding: Allergy Testing
A57473Billing and Coding: Allergy Testing

How L23.9 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 L23.9.

Dermatitis›sensitization NOS
Dermatitis›contact›allergic

Related codes at this level

Codes that share L23. If L23.9 is not quite right, the correct code is usually one of these.

Questions about L23.9

Is L23.9 a billable ICD-10-CM code?: Yes. L23.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does L23.9 sit in the tabular list?: Diseases of the skin and subcutaneous tissue (L00-L99), in the block Dermatitis and eczema (L20-L30).