Z67.91 — Unspecified blood type, Rh negative
Is Z67.91 billable?
Yes, but Z67.91 is an unspecified code. Z67.91 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, Z67.91 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting Z67.91 — the more specific alternatives are listed below.
More specific alternatives
Z67.91 at a glance
| Code | Z67.91 |
|---|---|
| Description | Unspecified blood type, Rh negative |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
What Medicare edits apply to Z67.91?
The Medicare Code Editor screens inpatient claims before they are grouped. These edits name Z67.91 directly.
CMS will reject this code as the principal diagnosis on an inpatient claim. It describes something other than the condition chiefly responsible for the admission.
Which MS-DRGs does Z67.91 group to?
Z67.91 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 Z67.91 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to Z67.91. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Blood › type › Rh › negative
How long has Z67.91 existed?
Z67.91 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.