ICD-10-CM Code B97.21

SARS-associated coronavirus as the cause of diseases classified elsewhere

Version 2020 Billable Code Unacceptable Principal Diagnosis

Valid for Submission

B97.21 is a billable code used to specify a medical diagnosis of sars-associated coronavirus as the cause of diseases classified elsewhere. The code is valid for the year 2020 for the submission of HIPAA-covered transactions.

The code B97.21 describes a circumstance which influences the patient's health status but not a current illness or injury. The code is unacceptable as a principal diagnosis.

ICD-10:B97.21
Short Description:SARS-associated coronavirus causing diseases classd elswhr
Long Description:SARS-associated coronavirus as the cause of diseases classified elsewhere

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code B97.21:

Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • pneumonia due to SARS-associated coronavirus J12.81

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code B97.21 are found in the index:


Code Edits

The Medicare Code Editor (MCE) detects and reports errors in the coding of claims data. The following ICD-10 Code Edits are applicable to this code:

  • 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.

Diagnostic Related Groups

The ICD-10 code B97.21 is grouped in the following groups for version MS-DRG V37.0 What are Diagnostic Related Groups?
The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC).
applicable from 10/01/2019 through 09/30/2020.

  • 865 - VIRAL ILLNESS WITH MCC
  • 866 - VIRAL ILLNESS WITHOUT MCC

Convert B97.21 to ICD-9

  • 079.82 - SARS assoc coronavirus

Code Classification

  • Certain infectious and parasitic diseases (A00–B99)
    • Bacterial and viral infectious agents (B95-B97)
      • Viral agents as the cause of diseases classified elsewhere (B97)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Information for Patients


Coronavirus Infections

Coronaviruses are common viruses that most people get some time in their life. They are common throughout the world, and they can infect people and animals. Several different coronaviruses can infect people and make them sick. They usually cause mild to moderate upper-respiratory illness. But, some coronaviruses can cause severe illness.

Coronaviruses probably spread through the air by coughing or sneezing, or by close personal contact. If you get infected, symptoms may include

  • Runny nose
  • Cough
  • Sore throat
  • Fever

You may be able to reduce your risk of infection by washing your hands often with soap and water, not touching your eyes, nose, or mouth, and avoiding close contact with people who are sick. There is no vaccine to prevent coronavirus infection. There are no specific treatments. You can relieve symptoms with pain and fever medicines and rest.

Centers for Disease Control and Prevention


[Learn More]