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ICD-10-CM 2027 diagnosis code

Y99.2Volunteer activity

✓ Billable / specificPOA exempt

Y99.2 is a valid, billable ICD-10-CM code for volunteer activity. 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 Y99.2

Y99.2 is the ICD-10-CM diagnosis code for Volunteer activity. It belongs to category Y99 (external cause status), block Y90-Y99 (Supplementary factors related to causes of morbidity classified elsewhere) 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 Y99 (external cause status), Y99.2 is specifically for Volunteer activity. Related codes cover civilian activity done for income or pay (Y99.0), military activity (Y99.1), other external cause status (Y99.8) and unspecified external cause status (Y99.9).

Don't report Y99.2 together with the conditions in its Excludes1 note: activity of child or other family member assisting in compensated work of other family member (Y99.8).

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

It is exempt from present-on-admission (POA) reporting, so no POA indicator is required.

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 E000.2 (Volunteer activity).

Coding notes

Excludes1Not coded here — never report together with this code
  • activity of child or other family member assisting in compensated work of other family member (Y99.8)

Notes that apply from higher levels

Instructions written at a parent level also apply to Y99.2.

› From Y99 External cause status
Note
  • A single code from category Y99 should be used in conjunction with the external cause code(s) assigned to a record to indicate the status of the person at the time the event occurred.

Broader instructions also apply from Y90-Y99 Supplementary factors related to causes of morbidity classified elsewhere and Chapter 20: External causes of morbidity.

Alphabetic index entries

2 entries

Terms in the official ICD-10-CM index that lead to Y99.2.

Codes whose notes reference Y99.2

ICD-9-CM equivalent

Converter →

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 Y99.2

Is Y99.2 billable?

Yes. Y99.2 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can Y99.2 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict Y99.2 as a principal diagnosis.

Is Y99.2 a CC or MCC?

No. Y99.2 is neither a CC nor an MCC under MS-DRG v44.0.

What is the ICD-9 code for Y99.2?

The CMS General Equivalence Mappings map Y99.2 to ICD-9-CM E000.2.