Z20.820 — Contact with and (suspected) exposure to varicella
Is Z20.820 billable?
Yes — Z20.820 is billable for FY2027. Z20.820 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. Z20.820 may be submitted for encounters from October 1, 2026 through September 30, 2027.
Z20.820 at a glance
| Code | Z20.820 |
|---|---|
| Description | Contact with and (suspected) exposure to varicella |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does Z20.820 group to?
Z20.820 sits in MDC 15 and helps define the logic of 1 MS-DRG (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 795Normal Newbornmedical
How is Z20.820 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to Z20.820. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Contact › varicella (with)
- Exposure › varicella (to)
Excludes1 — never code together — inherited from Z20
The conditions below can never be reported together with Z20.820 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
- carrier of infectious disease (Z22.-)
- diagnosed current infectious or parasitic disease -see Alphabetic Index
Excludes2 — not included here — inherited from Z20
The conditions below are not part of Z20.820, but a patient may have both at the same time. When documentation supports it, Z20.820 and the excluded code may both be reported.
- personal history of infectious and parasitic diseases (Z86.1-)
How long has Z20.820 existed?
Z20.820 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.