Is L98.5 a billable ICD-10-CM code?

Yes. L98.5 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does L98.5 sit in the tabular list?

Diseases of the skin and subcutaneous tissue (L00-L99), in the block Other disorders of the skin and subcutaneous tissue (L80-L99).

What cannot be coded together with L98.5?

L98.5 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

L98.5

L98.5 — Mucinosis of the skin

Billable / specific codeICD-10-CM

L98.5 is a billable, specific ICD-10-CM code for mucinosis of the skin. It is valid for submission on a claim.

Excludes1 — never code together

These conditions cannot occur together. Billing both on the same encounter is a denial.

focal oral mucinosis (K13.79)
myxedema (E03.9)

Inclusion terms

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

Focal mucinosis
Lichen myxedematosus
Reticular erythematous mucinosis

Risk adjustment

L98.5 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

L98.5 is named in 8 Medicare coverage policies — 8 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A56439Billing and Coding: Blepharoplasty
A56786Billing and Coding: Immune Globulin
A57044Billing and Coding: Removal of Benign Skin Lesions
A57482Billing and Coding: Removal of Benign Skin Lesions

How L98.5 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 L98.5.

Mucinosis(cutaneous) (focal) (papular) (reticular erythematous) (skin)
Reticular erythematous mucinosis
Scleromyxedema
Lichen›myxedematosus
Myxedema›cutis
Myxedema›papular

Related codes at this level

Codes that share L98. If L98.5 is not quite right, the correct code is usually one of these.

Questions about L98.5

Is L98.5 a billable ICD-10-CM code?: Yes. L98.5 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does L98.5 sit in the tabular list?: Diseases of the skin and subcutaneous tissue (L00-L99), in the block Other disorders of the skin and subcutaneous tissue (L80-L99).
What cannot be coded together with L98.5?: L98.5 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.