2026 ICD-10-CM Diagnosis Code B97.89Other viral agents as the cause of diseases classified elsewhere

ICD-10-CM Codes›A00–B99›B95-B97›B97

ICD-10-CM B97.89
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

B97.89 is a billable ICD-10-CM diagnosis code for other viral agents as the cause of diseases classified elsewhere. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 865 through 866. The code is not accepted as a principal diagnosis by the Medicare Code Editor. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Viral infection.

Code Identity

ICD-10-CM Code
B97.89
Billable Status
Yes — Valid for Submission
Code Describes
Other viral agents as the cause of diseases classified elsewhere
Short Description
Oth viral agents as the cause of diseases classd elswhr
Parent Code
B97.8
Other viral agents as the cause of diseases classified elsewhere

Code Classification

ChapterA00–B99Certain infectious and parasitic diseases
SectionB95-B97Bacterial and viral infectious agents
CategoryB97Viral agents as the cause of diseases classified elsewhere
This CodeB97.89Other viral agents as the cause of diseases classified elsewhere

Code EditsBilling

Medicare Code Editor checks that affect claim validity for B97.89.

Unacceptable principal diagnosis
There are selected codes that describe a circumstance which influences an individual's health status but not a current illness or injury, or codes that are not specific manifestations but may be due to an underlying cause. These codes are considered unacceptable as a principal diagnosis.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute laryngotracheitis
  • Acute pancreatitis due to infection
  • Acute sialoadenitis
  • Acute sinusitis caused by virus
  • Acute tracheitis
  • Acute viral laryngotracheitis
  • Acute viral sialadenitis
  • Arthropathy associated with viral disease
  • BK virus nephropathy
  • Chorioamnionitis
  • Chorioamnionitis caused by virus
  • Congenital pneumonia
  • Congenital viral pneumonia
  • Disease caused by Alphavirus
  • Disease caused by BK polyomavirus
  • Disease caused by Flaviviridae
  • Disease caused by Orbivirus
  • Disease caused by Orthomyxoviridae
  • Disease caused by Paramyxoviridae
  • Disease caused by Picornaviridae
  • Disease caused by Polyomaviridae
  • Disease caused by Poxviridae
  • Disease caused by Rhabdoviridae
  • Disease caused by Togaviridae
  • Duodenal ulcer caused by virus
  • Enthesitis
  • Erythema multiforme due to viral disease
  • Febrile leukopenia
  • Gastric ulcer caused by virus
  • Infection causing spondyloarthritis
  • Infection involving inner ear
  • Infection of eye caused by Avian Paramyxovirus 1
  • Infection of lacrimal gland caused by virus
  • Infection of tendon sheath caused by virus
  • Infection of testis and epididymis
  • Infectious pancreatitis
  • Infective epididymitis
  • Infective epididymo-orchitis
  • Infective orchitis
  • Infective sialoadenitis
  • Infective ulcer of esophagus
  • Inflammation of larynx caused by virus
  • Influenza with laryngitis
  • Labyrinthitis of left inner ear
  • Labyrinthitis of right inner ear
  • Mumps epididymo-orchitis
  • Mumps orchitis
  • Myelitis caused by virus
  • Neonatal viral conjunctivitis
  • Parainfluenza virus laryngitis
  • Parainfluenza virus laryngotracheitis
  • Parainfluenza virus pharyngitis
  • Patient shedding virus
  • Post-renal transplant nephropathy caused by BK polyomavirus
  • Renal impairment caused by Polyomavirus
  • Severe fever with thrombocytopenia syndrome
  • Upper respiratory tract infection caused by influenza virus
  • Urinary tract infection following procedure
  • Viral acute pancreatitis
  • Viral bursitis
  • Viral cystitis
  • Viral discitis
  • Viral endocarditis
  • Viral epiglottitis
  • Viral infection of cranial nerve
  • Viral kidney infection
  • Viral labyrinthitis
  • Viral labyrinthitis of left inner ear
  • Viral labyrinthitis of right inner ear
  • Viral retinitis
  • Viral sinusitis
  • Viral spondyloarthritis
  • Viral tracheitis
  • Viral ulcer of esophagus

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Infection, infected, infective(opportunistic)
      • rhinovirus
        • as cause of disease classified elsewhere
    • Infection, infected, infective(opportunistic)
      • virus, viral NOS
        • as cause of disease classified elsewhere
    • Infection, infected, infective(opportunistic)
      • virus, viral NOS
        • as cause of disease classified elsewhere
          • specified NEC
    • Infection, infected, infective(opportunistic)
      • virus, viral NOS
        • rhinovirus
          • as cause of disease classified elsewhere
    • Infection, infected, infective(opportunistic)
      • virus, viral NOS
        • specified type NEC
          • as cause of disease classified elsewhere
    • Virus, viral
      • as cause of disease classified elsewhere

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR INF008
Viral infection
Default principal diagnosis: inpatient No · outpatient No

Clinical InformationClinical

  • Chorioamnionitis

    inflammation of the placental membranes (chorion; amnion) and connected tissues such as fetal blood vessels and umbilical cord. it is often associated with intrauterine ascending infections during pregnancy.

  • Phlebovirus

    a genus of the family bunyaviridae comprising many viruses, most of which are transmitted by phlebotomus flies and cause phlebotomus fever. the type species is rift valley fever virus.

  • Severe Fever with Thrombocytopenia Syndrome

    a tick-borne infection with severe fever with thrombocytopenia syndrome bunyavirus of the genus phlebovirus. it is associated with fever, thrombocytopenia; leukocytopenia, and multiorgan dysfunction. it is found in parts of asia including china, japan, korea and vietnam and can be transmitted from infected domestic animals and humans.

  • Enthesitis

    inflammation at the site of insertion of ligaments, tendons, and other fibrous structures into bone.

  • Enthesitis-Related Arthritis|ERA|ERA|Enthesitis-Related JIA|Enthesitis-Related JIA|Enthesitis-Related Juvenile Idiopathic Arthritis|Enthesitis-Related Juvenile Idiopathic Arthritis

    a category of juvenile idiopathic arthritis associated with arthritis and enthesitis, which may involve the axial skeleton. it is a form of juvenile spondyloarthritis.

  • Viral Laryngitis

    acute inflammation of the larynx caused by viruses, including rhinovirus, influenza virus, parainfluenza virus, and adenovirus.

  • Chorioamnionitis

    a morphologic finding indicating inflammation of the fetal sac membranes. it is characterized by neutrophilic infiltration of the amnion and chorion.

  • Clinical Chorioamnionitis

    inflammation of the fetal sac membranes, characterized by otherwise unexplained fever (at or above 38 degree c (100.4f)) with one or more of the following: uterine tenderness and/or irritability, leukocytosis, fetal tachycardia, maternal tachycardia, or malodorous vaginal discharge.

  • Histologic Chorioamnionitis|Acute Amnionitis|Acute Chorioamnionitis|Acute Choriodeciduitis|Acute Chorionitis|Microscopic Chorioamnionitis

    inflammation of the fetal sac membranes that is characterized by neutrophilic infiltration of the amnion and chorion.

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 B97.89 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
079.89 Oth specf viral infectn
Approximate The match is approximate rather than exact.
ICD-9-CM
079.99 Viral infection NOS
Approximate The match is approximate rather than exact.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About B97.89Overview

Is B97.89 a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other viral agents as the cause of diseases classified elsewhere on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does B97.89 group to?

On inpatient claims, other viral agents as the cause of diseases classified elsewhere maps to MS-DRG 865, 866, with relative weights from 0.8696 to 1.4983 depending on complications. Higher weights mean higher Medicare reimbursement.

Can B97.89 be a principal diagnosis?

No. The Medicare Code Editor rejects this code as a principal diagnosis because other viral agents as the cause of diseases classified elsewhere describes a circumstance that influences health status rather than a current illness. Report it as a secondary diagnosis.

What is the ICD-9 equivalent of B97.89?

Under the General Equivalence Mappings, other viral agents as the cause of diseases classified elsewhere converts to ICD-9-CM 079.89 (oth specf viral infectn) and 079.99 (viral infection NOS). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.