2027 ICD-10-CM Diagnosis Code B33.8Other specified viral diseases
ICD-10-CM Codes›A00–B99›B25-B34›B33
- Billable — Valid for Submission
- Not Chronic
B33.8 is a billable ICD-10-CM diagnosis code for other specified viral diseases. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 865 through 866. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Viral infection.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acute infectious lymphocytosis
- Banzi virus disease
- Bussuquara virus disease
- California serogroup virus non-neuroinvasive disease
- Candidu virus disease
- Coxsackie virus hepatitis
- Disease caused by Alphavirus
- Disease caused by Aphthovirus
- Disease caused by Arenavirus
- Disease caused by Birnavirus
- Disease caused by Bunyaviridae
- Disease caused by Calicivirus
- Disease caused by California serogroup virus
- Disease caused by Circoviridae
- Disease caused by Filoviridae
- Disease caused by Flavivirus
- Disease caused by Lone star virus
- Disease caused by Lyssavirus
- Disease caused by Morbillivirus
- Disease caused by Nairovirus
- Disease caused by Orthobunyavirus
- Disease caused by Paramyxovirinae
- Disease caused by Phlebovirus
- Disease caused by Pneumovirus
- Disease caused by Respirovirus
- Disease caused by Rubivirus
- Disease caused by Vesiculovirus
- Duvenhage virus disease
- Everglades virus disease
- Hepatitis in coxsackie viral disease
- Infection caused by Henipavirus
- Infection caused by Nipah virus
- Infectious lymphocytosis
- Jamestown Canyon virus disease
- Le Dantec virus disease
- Lymphocystis disease
- Mokola virus disease
- Ockelbo disease
- Pichinde virus disease
- Punta Toro virus disease
- Sepik fever
- Spondweni fever
- Tacaribe virus disease
- Tahyna fever
- Viral arthritis
- Viral encephalomyelocarditis
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to B33.8: its own notes plus those printed at Chapter 1. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
- diseases generally recognized as communicable or transmissible
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- 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 Code
Add a second code, after this one, to fully describe the condition.
- code to identify resistance to antimicrobial drugs (Z16.-)
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name B33.8, its category, or a range that includes it.
Applicable To 1
These notes mention B33.8.
- O98.5 Other viral diseases complicating pregnancy, childbirth and the puerperium
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Aujeszky's disease B33.8
Disease, diseased See Also: Syndrome;
Tahyna fever B33.8
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Pseudorabies
a highly contagious herpesvirus infection affecting the central nervous system of swine, cattle, dogs, cats, rats, and other animals.
Patient EducationClinical
Viral Infections
Viruses are very tiny germs. They are made of genetic material (either DNA or RNA) inside of a protein coating. There are a huge number of viruses on earth. Only a small number of them can infect humans. Those viruses can infect our cells, which may cause disease.
The full article covers:
- What are viruses?
- How are viruses spread?
- How do viruses cause disease?
- What are the treatments for viral infections?
- Can viral infections be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert B33.8 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About B33.8Overview
What is the ICD-10 code for other specified viral diseases?
The ICD-10-CM code for other specified viral diseases is B33.8 (sometimes written as B338). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is B33.8 (Other viral diseases, not elsewhere classified) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report other specified viral diseases on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does B33.8 group to?
When other specified viral diseases is the principal diagnosis on an inpatient stay, it groups to MS-DRG 866, 865, with relative weights from 0.8691 to 1.3153 depending on complications. Higher weights mean higher Medicare reimbursement.
Can B33.8 be reported with A63.0?
Not as a rule. The Excludes1 note on B33.8 lists "anogenital human papillomavirus infection (A63.0)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
What is the ICD-9 equivalent of B33.8?
Under the General Equivalence Mappings, other specified viral diseases converts to ICD-9-CM 078.2 (sweating fever), 078.89 (oth spec dis viruses), and 079.89 (oth specf viral infectn). The mapping is approximate, so confirm the match fits the documentation.
