A84Non-billableSave
A84 - Tick-borne viral encephalitis
ICD-10-CM Chapter 1: Certain infectious and parasitic diseases · A80-A89 Viral and prion infections of the central nervous system (A80-A89) · Top-level category · FY2027
Coding Guidance
A84 is a non-billable heading. Report one of the 4 more specific codes below.
Includes, Excludes and Coding Notes
IncludesFrom A84
Conditions this code covers.
- tick-borne viral meningoencephalitis
Excludes 1 — Not Coded HereFrom A80-A89 Viral and prion infections of the central nervous system (A80-A89)
Mutually exclusive: these conditions are never reported together with this code.
- postpolio syndrome (G14)
- sequelae of poliomyelitis (B91)
- sequelae of viral encephalitis (B94.1)
IncludesFrom Chapter A00-B99
Conditions this code covers.
- diseases generally recognized as communicable or transmissible
Excludes 2 — Not Included HereFrom Chapter A00-B99
Not part of this code; report both codes when the patient has both conditions.
- carrier or suspected carrier of infectious disease (Z22.-)
- certain localized infections - see body system-related chapters
- infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (O98.-)
- infectious and parasitic diseases specific to the perinatal period (P35-P39)
- influenza and other acute respiratory infections (J00-J22)
Use Additional CodeFrom Chapter A00-B99
Add a secondary code to identify the associated condition or cause when it is documented.
- code to identify resistance to antimicrobial drugs (Z16.-)
Chapter Information
Related ICD-10 Codes
More specific codes for A84
Other categories in this chapter
Codes at the same level as A84
- CholeraA00
- Typhoid and paratyphoid feversA01
- Other salmonella infectionsA02
- ShigellosisA03
- Other bacterial intestinal infectionsA04
- Other bacterial foodborne intoxications, not elsewhere classifiedA05
- AmebiasisA06
- Other protozoal intestinal diseasesA07
- Viral and other specified intestinal infectionsA08
- Infectious gastroenteritis and colitis, unspecifiedA09
- Respiratory tuberculosisA15
- Tuberculosis of nervous systemA17
- Tuberculosis of other organsA18
- Miliary tuberculosisA19
- PlagueA20
- TularemiaA21
- AnthraxA22
- BrucellosisA23
- Glanders and melioidosisA24
- Rat-bite feversA25
- ErysipeloidA26
- LeptospirosisA27
- Other zoonotic bacterial diseases, not elsewhere classifiedA28
- Leprosy [Hansen's disease]A30
- Infection due to other mycobacteriaA31
- ListeriosisA32
- Tetanus neonatorumA33
- Obstetrical tetanusA34
- Other tetanusA35
- DiphtheriaA36
- Whooping coughA37
- Scarlet feverA38
- Meningococcal infectionA39
- Streptococcal sepsisA40
- Other sepsisA41
- ActinomycosisA42
- NocardiosisA43
- BartonellosisA44
- ErysipelasA46
- Other bacterial diseases, not elsewhere classifiedA48
126 more in this chapter.