2027 ICD-10-CM Diagnosis Code Z20.828Contact with and (suspected) exposure to other viral communicable diseases
Z20.828 is a billable ICD-10-CM diagnosis code for contact with and (suspected) exposure to other viral communicable diseases. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 795, 951. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Exposure, encounters, screening or contact with infectious disease.
Code Identity
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Acute poliomyelitis suspected
- Coronavirus infection suspected
- Dengue suspected
- Ebola virus disease suspected
- Exposure to anogenital Herpes simplex virus
- Exposure to coronavirus infection
- Exposure to cytomegalovirus
- Exposure to Ebola virus
- Exposure to European tick-borne encephalitis virus
- Exposure to herpes simplex virus
- Exposure to Human poliovirus
- Exposure to Influenza A virus subtype H1N1
- Exposure to influenzavirus
- Exposure to Measles virus
- Exposure to meningitis
- Exposure to monkeypox virus
- Exposure to Mumps virus
- Exposure to Severe acute respiratory syndrome coronavirus
- Exposure to Variola virus
- Exposure to viral disease
- Exposure to viral meningitis
- Measles suspected
- Monkeypox suspected
- Mumps suspected
- Occupational exposure to monkeypox virus
- Probable rabies
- Probable SARS
- Severe acute respiratory syndrome suspected
- Smallpox suspected
- Suspected infection caused by novel Influenza A virus variant
- Suspected soft tissue infection
- Suspected viral infection
- Viral hemorrhagic fever suspected
- Viral infection of skin suspected
- Yellow fever suspected
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to Z20.828: its own notes plus those printed at Z20 and Chapter 21. A note printed at a category, block or chapter applies to every code under it.
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.
Notes
General instructions on how these codes are used.
- Z codes represent reasons for encounters. A corresponding procedure code must accompany a Z code if a procedure is performed. Categories Z00-Z99 are provided for occasions when circumstances other than a disease, injury or external cause classifiable to categories A00-Y89 are recorded as 'diagnoses' or 'problems'. This can arise in two main ways:
- (a) When a person who may or may not be sick encounters the health services for some specific purpose, such as to receive limited care or service for a current condition, to donate an organ or tissue, to receive prophylactic vaccination (immunization), or to discuss a problem which is in itself not a disease or injury.
- (b) When some circumstance or problem is present which influences the person's health status but is not in itself a current illness or injury.
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name Z20.828, its category, or a range that includes it.
Excludes2 2
These codes carry an Excludes2 note naming Z20.828: its condition is not part of those codes, and both may be reported when the patient has both.
- Z77 Other contact with and (suspected) exposures hazardous to healthcontact with and (suspected) exposure to communicable diseases (Z20.-) names Z20.-, which includes this code
- Z83 Family history of other specific disorderscontact with and (suspected) exposure to communicable disease in the family (Z20.-) names Z20.-, which includes this code
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Contact (with) See Also: Exposure (to);
Exposure (to) See Also: Contact, with; T75.89
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
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 Z20.828 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About Z20.828Overview
Is Z20.828 a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report contact with and (suspected) exposure to other viral communicable diseases on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does Z20.828 group to?
When contact with and (suspected) exposure to other viral communicable diseases is the principal diagnosis on an inpatient stay, it groups to MS-DRG 951, 795, with relative weights from 0.2022 to 0.5574 depending on complications. Higher weights mean higher Medicare reimbursement.
Can Z20.828 be reported with a code from Z22?
Not as a rule. The Excludes1 note at Z20, which applies to Z20.828, lists "carrier of infectious disease (Z22.-)". 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 Z20.828?
Under the General Equivalence Mappings, contact with and (suspected) exposure to other viral communicable diseases converts to ICD-9-CM V01.79 (viral dis contact NEC). The mapping is approximate, so confirm the match fits the documentation.
