2025 ICD-10-CM Diagnosis Code Y66
Nonadministration of surgical and medical care
- ICD-10-CM Code:
- Y66
- ICD-10 Code for:
- Nonadministration of surgical and medical care
- Is Billable?
- Yes - Valid for Submission
- Code Navigator:
Y66 is a billable diagnosis code used to specify a medical diagnosis of nonadministration of surgical and medical care. The code is valid during the current fiscal year for the submission of HIPAA-covered transactions from October 01, 2024 through September 30, 2025.
Clinical Classification
Clinical Classifications group individual ICD-10-CM diagnosis codes into broader, clinically meaningful categories. These categories help simplify complex data by organizing related conditions under common clinical themes.
They are especially useful for data analysis, reporting, and clinical decision-making. Even when diagnosis codes differ, similar conditions can be grouped together based on their clinical relevance. Each category is assigned a unique CCSR code that represents a specific clinical concept, often tied to a body system or medical specialty.
External cause codes: complications of medical and surgical care, initial encounter
CCSR Code: EXT025
Inpatient Default: X - Not applicable.
Outpatient Default: X - Not applicable.
Tabular List of Diseases and Injuries
The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.
Inclusion Terms
Inclusion TermsThese terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
- Premature cessation of surgical and medical care
Type 1 Excludes
Type 1 ExcludesA type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
Index of External Cause of Injuries
References found for this diagnosis code in the External Cause of Injuries Index:
- Nonadministration(of)
- surgical and medical care
- Premature cessation(of) surgical and medical care
Convert Y66 to ICD-9-CM
Below are the ICD-9 codes that most closely match this ICD-10 code, based on the General Equivalence Mappings (GEMs). This ICD-10 to ICD-9 crosswalk tool is helpful for coders who need to reference legacy diagnosis codes for audits, historical claims, or approximate code comparisons.
Medical misadventure NEC
ICD-9-CM: E876.8
Approximate Flag - The approximate mapping means this ICD-10 code does not have an exact ICD-9 equivalent. The matched code is the closest available option, but it may not fully capture the original diagnosis or clinical intent.
Patient Education
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:
- Ask questions if you have doubts or concerns. Take a relative or friend to your doctor appointment to help you ask questions and understand answers.
- Make sure you understand what will happen if you need surgery
- Tell your health care providers about all the medicines you take, including over-the-counter drugs and dietary supplements. Tell them if you have any allergies or bad reactions to anesthesia. Make sure you know how to take your medications correctly.
- Get a second opinion about treatment options
- Keep a copy of your own medical history
Agency for Healthcare Research and Quality
[Learn More in MedlinePlus]
Code History
- FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
- FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
- FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
- FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
- FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
- FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
- FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
- FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
- FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.
