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ICD-10-CM 2027 diagnosis code

Y65.0Mismatched blood in transfusion

✓ Billable / specific

Y65.0 is a valid, billable ICD-10-CM code for mismatched blood in transfusion. It can be reported on claims for dates of service from October 1, 2026 – September 30, 2027.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About Y65.0

Y65.0 is the ICD-10-CM diagnosis code for Mismatched blood in transfusion. It belongs to category Y65 (other misadventures during surgical and medical care), block Y62-Y69 (misadventures to patients during surgical and medical care) and chapter 20 (external causes of morbidity). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within Y65 (other misadventures during surgical and medical care), Y65.0 is specifically for Mismatched blood in transfusion. Related codes cover wrong fluid used in infusion (Y65.1), failure in suture or ligature during surgical operation (Y65.2), endotracheal tube wrongly placed during anesthetic procedure (Y65.3), failure to introduce or to remove other tube or instrument (Y65.4), Performance of wrong procedure (operation) (Y65.5) and other specified misadventures during surgical and medical care (Y65.8).

It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as E876.0 (Mismatched blood in transfusion).

Notes that apply from higher levels

Instructions written at a parent level also apply to Y65.0.

Broader instructions also apply from Y62-Y69 Misadventures to patients during surgical and medical care and Chapter 20: External causes of morbidity.

Alphabetic index entries

4 entries

Terms in the official ICD-10-CM index that lead to Y65.0.

ICD-9-CM equivalent

Converter →
  • E876.0Mismatched blood in transfusionexact

From the CMS 2018 General Equivalence Mappings (GEMs), the final GEMs release.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about Y65.0

Is Y65.0 billable?

Yes. Y65.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can Y65.0 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict Y65.0 as a principal diagnosis.

Is Y65.0 a CC or MCC?

No. Y65.0 is neither a CC nor an MCC under MS-DRG v44.0.

What is the ICD-9 code for Y65.0?

The CMS General Equivalence Mappings map Y65.0 to ICD-9-CM E876.0.