ICD-10-CM Code Z20.01

Contact with and (suspected) exposure to intestinal infectious diseases due to Escherichia coli (E. coli)

Version 2020 Billable Code

Valid for Submission

Z20.01 is a billable code used to specify a medical diagnosis of contact with and (suspected) exposure to intestinal infectious diseases due to escherichia coli (e. coli). The code is valid for the year 2020 for the submission of HIPAA-covered transactions.

ICD-10:Z20.01
Short Description:Cntct w and expsr to intestnl infct dis d/t E coli (E. coli)
Long Description:Contact with and (suspected) exposure to intestinal infectious diseases due to Escherichia coli (E. coli)

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 Z20.01 are found in the index:


Convert Z20.01 to ICD-9

Code Classification

  • Factors influencing health status and contact with health services (Z00–Z99)
    • Persons with potential health hazards related to communicable diseases (Z20-Z29)
      • Contact w and exposure to communicable diseases (Z20) (suspected)

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


E. Coli Infections

E. coli is the name of a type of bacteria that lives in your intestines. Most types of E. coli are harmless. However, some types can make you sick and cause diarrhea. One type causes travelers' diarrhea. The worst type of E. coli causes bloody diarrhea, and can sometimes cause kidney failure and even death. These problems are most likely to occur in children and in adults with weak immune systems.

You can get E. coli infections by eating foods containing the bacteria. Symptoms of infection include

  • Nausea or vomiting
  • Severe abdominal cramps
  • Watery or very bloody diarrhea
  • Fatigue
  • Fever

To help avoid food poisoning and prevent infection, handle food safely. Cook meat well, wash fruits and vegetables before eating or cooking them, and avoid unpasteurized milk and juices. You can also get the infection by swallowing water in a swimming pool contaminated with human waste.

Most cases of E. coli infection get better without treatment in 5 to 10 days.


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