ICD-10-CM Code For Do Not Resuscitate: Group Overview

The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group Z66 includes codes indicating that a patient has a do not resuscitate order or otherwise declines cardiopulmonary resuscitation, reflecting advance care directives and treatment preferences. These ICD-10-CM diagnosis codes are used to document patient resuscitation preferences and advance care planning, capturing non-disease clinical status relevant to emergency and end-of-life care. Accurate coding within the ICD-10-CM Z66 group supports complete clinical documentation and proper claim adjudication.

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ICD-10-CM Z66: Do Not Resuscitate Overview

The ICD-10-CM Z66 diagnosis represents documentation that a patient has a decision in place to decline cardiopulmonary resuscitation. These codes target advance care planning and patient preference status rather than a specific organ system disease. Accurate coding ensures the patient’s resuscitation preference is captured in the medical record and supports appropriate administrative processing and billing.

When to Use

Use a code from this group when the medical record contains a valid do not resuscitate order or explicit documentation that cardiopulmonary resuscitation is declined. Do not assign these codes for hypothetical discussions or undocumented patient preferences.

ICD-10-CM Codes

1 rows

ICD-10-CM Code	Description
Z66	Do not resuscitate

DRG Codes

1 rows

DRG Code	Description
951	Other Factors Influencing Health Status

Typical Clinical Scenarios

An elderly patient with advanced metastatic cancer is admitted to the hospital for progressive dyspnea and pain control; the patient has a documented advance directive indicating no cardiopulmonary resuscitation in the event of cardiac or respiratory arrest, and the family provides the do-not-resuscitate order at admission. The clinical team records the patient’s code status to ensure that resuscitation measures are not initiated during an arrest. Typical codes: Z66
A frail nursing home resident with end-stage dementia develops aspiration pneumonia and is transferred to the emergency department for evaluation; during triage the patient’s previously documented comfort-focused care plan is confirmed and a standing order indicates no attempts at CPR. The emergency clinicians document the patient’s resuscitation preference in the medical record to guide acute treatment decisions. Typical codes: Z66
A chronically ill patient with severe chronic obstructive pulmonary disease and recurrent hospitalizations is seen in clinic for goals-of-care discussion, during which the patient elects a do-not-resuscitate status and completes the appropriate outpatient form. The outpatient clinician enters the code status into the problem list to ensure consistency across future encounters and hospital admissions. Typical codes: Z66

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

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When to Use

ICD-10-CM Codes

1 rows

ICD-10-CM Code	Description
Z66	Do not resuscitate

DRG Codes

1 rows

DRG Code	Description
951	Other Factors Influencing Health Status

Typical Clinical Scenarios

An elderly patient with advanced metastatic cancer is admitted to the hospital for progressive dyspnea and pain control; the patient has a documented advance directive indicating no cardiopulmonary resuscitation in the event of cardiac or respiratory arrest, and the family provides the do-not-resuscitate order at admission. The clinical team records the patient’s code status to ensure that resuscitation measures are not initiated during an arrest. Typical codes: Z66
A frail nursing home resident with end-stage dementia develops aspiration pneumonia and is transferred to the emergency department for evaluation; during triage the patient’s previously documented comfort-focused care plan is confirmed and a standing order indicates no attempts at CPR. The emergency clinicians document the patient’s resuscitation preference in the medical record to guide acute treatment decisions. Typical codes: Z66
A chronically ill patient with severe chronic obstructive pulmonary disease and recurrent hospitalizations is seen in clinic for goals-of-care discussion, during which the patient elects a do-not-resuscitate status and completes the appropriate outpatient form. The outpatient clinician enters the code status into the problem list to ensure consistency across future encounters and hospital admissions. Typical codes: Z66

Frequently Asked Questions

References

1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.

Published by

Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

ICD-10-CM Code For Do Not Resuscitate: Group Overview

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ICD-10-CM Z66: Do Not Resuscitate Overview

ICD-10-CM Code For Do Not Resuscitate: Group Overview

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ICD-10-CM Z66: Do Not Resuscitate Overview

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

What does the ICD-10-CM code group Z66 represent?

Which specific code is included in the Z66 group?

How is `Z66` used in clinical documentation and billing?

Does Z66 indicate a disease or an advance care status?

What related DRG is associated with factors influencing health status for Z66?

References

When to Use

ICD-10-CM Codes

DRG Codes

Typical Clinical Scenarios

What does the ICD-10-CM code group Z66 represent?

Which specific code is included in the Z66 group?

How is `Z66` used in clinical documentation and billing?

Does Z66 indicate a disease or an advance care status?

What related DRG is associated with factors influencing health status for Z66?

References