A81.1 — Subacute sclerosing panencephalitis
A81.1 is a billable, specific ICD-10-CM code for subacute sclerosing panencephalitis. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Dawson's inclusion body encephalitis
- Van Bogaert's sclerosing leukoencephalopathy
Other codes that can never be billed with A81.1
These codes carry an Excludes1 note pointing at A81.1. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading A81.1 alone.
- B05Measles
Risk adjustment
A81.1 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 127 Dementia, Mild or Unspecified0.341 RAF
Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score.
Medicare coverage
A81.1 is named in 3 Medicare coverage policies — 3 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.
- A56612Billing and Coding: CT of the Head
- A57204Billing and Coding: MRI and CT Scans of the Head and Neck
- A57206Billing and Coding: Lumbar MRI
How A81.1 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 A81.1.
- Bodechtel-Guttman disease(subacute sclerosing panencephalitis)
- Dawson's encephalitis(inclusion body)
- Panencephalitis, subacute, sclerosing
- Van Bogaert's leukoencephalopathy(sclerosing) (subacute)
- Disease, diseased›Bodechtel-Guttmann(subacute sclerosing panencephalitis)
- Encephalitis›Dawson's(inclusion body)
- Encephalitis›diffuse sclerosing
- Encephalitis›inclusion body
- Encephalitis›subacute sclerosing
- Encephalitis›van Bogaert's
- Leukoencephalitis›subacute sclerosing
- Leukoencephalitis›van Bogaert's(sclerosing)
Related codes at this level
Codes that share A81. If A81.1 is not quite right, the correct code is usually one of these.
Questions about A81.1
- Is A81.1 a billable ICD-10-CM code?
- Yes. A81.1 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does A81.1 sit in the tabular list?
- Certain infectious and parasitic diseases (A00-B99), in the block Viral and prion infections of the central nervous system (A80-A89).