L03.91 — Acute lymphangitis, unspecified
L03.91 is a billable, specific ICD-10-CM code for acute lymphangitis, unspecified. 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.
- lymphangitis NOS (I89.1)
Risk adjustment
L03.91 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
L03.91 is named in 2 Medicare coverage policies — 2 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A52996Billing and Coding: Routine Foot Care
- A57954Billing and Coding: Routine Foot Care
How L03.91 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 L03.91.
- Lymphangitis›acute
Related codes at this level
Codes that share L03.9. If L03.91 is not quite right, the correct code is usually one of these.
Questions about L03.91
- Is L03.91 a billable ICD-10-CM code?
- Yes. L03.91 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does L03.91 sit in the tabular list?
- Diseases of the skin and subcutaneous tissue (L00-L99), in the block Infections of the skin and subcutaneous tissue (L00-L08).
- What cannot be coded together with L03.91?
- L03.91 carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.