2027 ICD-10-CM Diagnosis Code Y66Nonadministration of surgical and medical care
Y66 is a billable ICD-10-CM diagnosis code for nonadministration of surgical and medical care. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under External cause codes: complications of medical and surgical care, initial encounter.
Code Identity
Code Classification
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to Y66: its own notes plus those printed at block Y62-Y84, block Y62-Y69, and Chapter 20. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
- complications of medical devices
- surgical and medical procedures as the cause of abnormal reaction of the patient, or of later complication, without mention of misadventure at the time of the procedure
Applicable To
Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.
- Premature cessation of surgical and medical care
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
Notes
General instructions on how these codes are used.
- This chapter permits the classification of environmental events and circumstances as the cause of injury, and other adverse effects. Where a code from this section is applicable, it is intended that it shall be used secondary to a code from another chapter of the Classification indicating the nature of the condition. Most often, the condition will be classifiable to Chapter 19, Injury, poisoning and certain other consequences of external causes (S00-T88). Other conditions that may be stated to be due to external causes are classified in Chapters I to XVIII. For these conditions, codes from Chapter 20 should be used to provide additional information as to the cause of the condition.
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name Y66, its category, or a range that includes it.
Excludes1 1
These codes carry an Excludes1 note naming Y66: they are not reported together with it, unless the two conditions are unrelated.
- Block Y83-Y84 Surgical and other medical procedures as the cause of abnormal reaction of the patient, or of later complication, without mention of misadventure at the time of the procedure
Excludes2 1
These codes carry an Excludes2 note naming Y66: its condition is not part of those codes, and both may be reported when the patient has both.
- Block Y70-Y82 Medical devices associated with adverse incidents in diagnostic and therapeutic use
Use Additional Code 1
These codes say to use an additional code from the note, and Y66 is one of the codes named.
- Block T80-T88 Complications of surgical and medical care, not elsewhere classified
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index; each main term links to its index entry.
- Nonadministration (of)
- surgical and medical care
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Patient EducationClinical
Patient Safety
You can help prevent medical errors by being an active member of your health care team. Research shows that patients who are more involved with their care tend to get better results. To reduce the risk of medical errors, you can:
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert Y66 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About Y66Overview
What is the ICD-10 code for nonadministration of surgical and medical care?
The ICD-10-CM code for nonadministration of surgical and medical care is Y66. It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is Y66 (Nonadministration of surgical and medical care) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report nonadministration of surgical and medical care on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Can Y66 be reported with Z66?
Not as a rule. The Excludes1 note on Y66 lists "DNR status (Z66)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
What is the ICD-9 equivalent of Y66?
Under the General Equivalence Mappings, nonadministration of surgical and medical care converts to ICD-9-CM E876.8 (medical misadventure NEC). The mapping is approximate, so confirm the match fits the documentation.
