ICD-10-CM 2027
ICD-10 code for DNR
From the official ICD-10-CM alphabetic index entry “DNR (do not resuscitate)”. Page updated September 29, 2026.
About coding DNR
The ICD-10-CM code for DNR is Z66 (Do not resuscitate).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 951 (Other Factors Influencing Health Status, relative weight 0.5577), in MDC 23 (Factors Influencing Health Status and Other Contacts with Health Services), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
It is not acceptable as the principal diagnosis for an inpatient stay; it may be reported as a secondary diagnosis.
Common questions about DNR ICD-10 codes
What is the ICD-10 code for DNR?
- Z66 — Do not resuscitate.
Is Z66 billable?
- Yes. Z66 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can Z66 be used as a principal diagnosis?
- No. It is not acceptable as the principal diagnosis for an inpatient stay; it may be reported as a secondary diagnosis.
Is Z66 a CC or MCC?
- No. Z66 is neither a CC nor an MCC under MS-DRG v44.0.