Is A92.31 a billable ICD-10-CM code?

Yes. A92.31 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does A92.31 sit in the tabular list?

Certain infectious and parasitic diseases (A00-B99), in the block Arthropod-borne viral fevers and viral hemorrhagic fevers (A90-A99).

A92.31

A92.31 — West Nile virus infection with encephalitis

Billable / specific codeICD-10-CM

A92.31 is a billable, specific ICD-10-CM code for west nile virus infection with encephalitis. It is valid for submission on a claim.

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

West Nile encephalitis
West Nile encephalomyelitis

Other codes that can never be billed with A92.31

These codes carry an Excludes1 note pointing at A92.31. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading A92.31 alone.

A85.2Arthropod-borne viral encephalitis, unspecified

Risk adjustment

A92.31 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

A92.31 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.

A56771Billing and Coding: Special Electroencephalography
A57204Billing and Coding: MRI and CT Scans of the Head and Neck
A59105Billing and Coding: Off-Label Use of Intravenous Immune Globulin (IVIG)
A60187Billing and Coding: Off-Label Use of Intravenous Immune Globulin (IVIG)

How A92.31 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 A92.31.

Virus, viral›West Nile›with›encephalitis
Virus, viral›West Nile›with›encephalomyelitis
Fever›West›Nile›with›encephalitis
Fever›West›Nile›with›encephalomyelitis

Related codes at this level

Codes that share A92.3. If A92.31 is not quite right, the correct code is usually one of these.

Questions about A92.31

Is A92.31 a billable ICD-10-CM code?: Yes. A92.31 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does A92.31 sit in the tabular list?: Certain infectious and parasitic diseases (A00-B99), in the block Arthropod-borne viral fevers and viral hemorrhagic fevers (A90-A99).