B01.11 — Varicella encephalitis and encephalomyelitis
B01.11 is a billable, specific ICD-10-CM code for varicella encephalitis and encephalomyelitis. It is valid for submission on a claim.
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Postchickenpox encephalitis and encephalomyelitis
Risk adjustment
B01.11 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
B01.11 is named in 7 Medicare coverage policies — 7 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
- A56771Billing and Coding: Special Electroencephalography
- A57204Billing and Coding: MRI and CT Scans of the Head and Neck
- A58710Billing and Coding: MolDX: Molecular Syndromic Panels for Infectious Disease Pathogen Identification Testing
How B01.11 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 B01.11.
- Encephalitis›postchickenpox
- Encephalitis›postvaricella
- Encephalomyelitis›postchickenpox
- Encephalomyelitis›postvaricella
- Varicella›with›encephalitis
- Varicella›with›encephalomyelitis
Related codes at this level
Codes that share B01.1. If B01.11 is not quite right, the correct code is usually one of these.
Questions about B01.11
- Is B01.11 a billable ICD-10-CM code?
- Yes. B01.11 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
- Where does B01.11 sit in the tabular list?
- Certain infectious and parasitic diseases (A00-B99), in the block Viral infections characterized by skin and mucous membrane lesions (B00-B09).