ICD-10-CM Code A81
Atypical virus infections of central nervous system
Non-Billable CodeNon-Billable means the code is not sufficient justification for admission to an acute care hospital when used a principal diagnosis. Use a child code to capture more detail.
ICD Code A81 is a non-billable code. To code a diagnosis of this type, you must use one of the five child codes of A81 that describes the diagnosis 'atypical virus infections of central nervous system' in more detail.
- A81 Atypical virus infections of central nervous system NON-BILLABLE
- A81.0 NON-BILLABLE
- BILLABLE A81.1
- BILLABLE A81.2
- A81.8 virus infections of central nervous system NON-BILLABLE
- A81.81 Kuru BILLABLE
- A81.82 Gerstmann-Straussler-Scheinker syndrome BILLABLE
- A81.83 Fatal familial insomnia BILLABLE
- A81.89 Other atypical virus infections of central nervous system BILLABLE
- BILLABLE A81.9 Atypical virus of central nervous
The ICD code A81 is used to code Prion
A prion (i/ˈpriːɒn/) is an infectious agent thought to be the cause of the transmissible spongiform encephalopathies (TSEs). It is composed entirely of protein material, called PrP (short for prion protein), that can fold in multiple, structurally distinct ways, at least one of which is transmissible to other prion proteins, leading to disease that is similar to viral infection. The word prion, coined in 1982 by Stanley B. Prusiner—derived from the words protein and infection, hence prion—is short for "proteinaceous infectious particle", in reference to its ability to self-propagate and transmit its conformation to other proteins. Prions were initially identified as the causative agent in animal TSEs such as bovine spongiform encephalopathy (BSE)—known popularly as "mad cow disease"—and scrapie in sheep. Human prion diseases include Creutzfeldt-Jakob Disease (CJD) and its variant (vCJD), Gerstmann–Sträussler–Scheinker syndrome, Fatal Familial Insomnia, and kuru. A recent study concluded that multiple system atrophy (MSA), a rare human neurodegenerative disease, is caused by a misfolded version of a protein called alpha-synuclein, and is therefore also classifiable as a prion disease. Several yeast proteins have been identified as having prionogenic properties as well.
|ICD 9 Code:||46|
Microscopic "holes" are characteristic in prion-affected tissue sections, causing the tissue to develop a "spongy" architecture.
Coding Notes for A81 Info for medical coders on how to properly use this ICD-10 code
Code Includes Notes:
IncludesIncludes notes further define, or give examples of, conditions included in the section.
- Diseases of the central nervous system caused by prions
Additional Code Note:
Use Additional CodeUse Additional Code note means a second code must be used in conjunction with this code. Codes with this note are Etiology codes and must be followed by a Manifestation code or codes.
- Code to identify:
- Dementia with behavioral disturbance See code F02.81
- Dementia without behavioral disturbance See code F02.80
ICD-10-CM Alphabetical Index References for 'A81 - Atypical virus infections of central nervous system'
The ICD-10-CM Alphabetical Index links the below-listed medical terms to the ICD code A81. Click on any term below to browse the alphabetical index.