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Z20.01

Z20.01: Contact with and (suspected) exposure to intestinal infectious diseases due to Escherichia coli (E. coli)

Billable / specific codeICD-10-CM

Z20.01 is a billable, specific ICD-10-CM code for contact with and (suspected) exposure to intestinal infectious diseases due to escherichia coli (e. coli). It is valid for submission on a claim.

Check Z20.01 with the rest of the claim: free scrubber

Excludes1 inherited from the categories above Z20.01

A category’s note binds every code beneath it.

Written on Z20: Contact with and (suspected) exposure to communicable diseases

  • carrier of infectious disease (Z22.-)
  • diagnosed current infectious or parasitic disease -see Alphabetic Index

Excludes2 inherited from the categories above Z20.01

Not part of this code, but both may be coded when both are present.

Written on Z20: Contact with and (suspected) exposure to communicable diseases

  • personal history of infectious and parasitic diseases (Z86.1-)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Alphabetic index entries that lead here

  • Contact›Escherichia coli(E. coli)
  • Exposure›Escherichia coli(E. coli)
  • Contact›intestinal infectious disease NEC›Escherichia coli(E. coli)
  • Exposure›intestinal infectious disease NEC›Escherichia coli(E. coli)

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under Z20.0

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.