L04.1 — Acute lymphadenitis of trunk
L04.1 is a billable, specific ICD-10-CM code for acute lymphadenitis of trunk. It is valid for submission on a claim.
Risk adjustment
L04.1 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
L04.1 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.
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- A53058Billing and Coding: Home Health Physical Therapy
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- A56775Billing and Coding: Magnetic Resonance Angiography
How L04.1 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 L04.1.
- Infection, infected, infective›inguinal glands(lymph)
- Abscess›inguinal›lymph gland or node
- Adenitis›groin›acute
- Adenitis›inguinal›acute
- Lymphadenitis›acute›trunk
Related codes at this level
Codes that share L04. If L04.1 is not quite right, the correct code is usually one of these.
Questions about L04.1
- Is L04.1 a billable ICD-10-CM code?
- Yes. L04.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does L04.1 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).