Z03.818 — Encounter for observation for suspected exposure to other biological agents ruled out
Is Z03.818 billable?
Yes — Z03.818 is billable for FY2027. Z03.818 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. Z03.818 may be submitted for encounters from October 1, 2026 through September 30, 2027.
Z03.818 at a glance
| Code | Z03.818 |
|---|---|
| Description | Encounter for observation for suspected exposure to other biological agents ruled out |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does Z03.818 group to?
Z03.818 sits in MDC 23 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.
- 951Other Factors Influencing Health Statusmedical
How is Z03.818 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to Z03.818. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Encounter › suspected exposure, ruled out › biological agents NEC (with health service) (for)
- Encounter › observation › exposure to › biological agent NEC (with health service) (for)
- Observation › suspected, ruled out › exposure › biological agent NEC (following) (for) (without need for further medical care)
Excludes1 — never code together — inherited from Z03
The conditions below can never be reported together with Z03.818 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.
Excludes2 — not included here — inherited from Z00-Z13
The conditions below are not part of Z03.818, but a patient may have both at the same time. When documentation supports it, Z03.818 and the excluded code may both be reported.
How long has Z03.818 existed?
Z03.818 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.