I73.81 — Erythromelalgia
I73.81 is a billable, specific ICD-10-CM code for erythromelalgia. It is valid for submission on a claim.
Risk adjustment
I73.81 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
I73.81 is named in 4 Medicare coverage policies — 4 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
- A56775Billing and Coding: Magnetic Resonance Angiography
- A57193Billing and Coding: Routine Foot Care and Debridement of Nails
- A57759Billing and Coding: Routine Foot Care and Debridement of Nails
How I73.81 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 I73.81.
- Acromelalgia
- Erythermalgia(primary)
- Erythralgia
- Erythromelalgia
- Mitchell's disease(erythromelalgia)
- Weir Mitchell's disease
- Disease, diseased›Gerhardt's(erythromelalgia)
- Disease, diseased›Mitchell's(erythromelalgia)
- Disease, diseased›Weir Mitchell's(erythromelalgia)
- Gerhardt's›disease(erythromelalgia)
Related codes at this level
Codes that share I73.8. If I73.81 is not quite right, the correct code is usually one of these.
Questions about I73.81
- Is I73.81 a billable ICD-10-CM code?
- Yes. I73.81 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does I73.81 sit in the tabular list?
- Diseases of the circulatory system (I00-I99), in the block Diseases of arteries, arterioles and capillaries (I70-I79).