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ICD-10-CM 2027 diagnosis code

Y99.0Civilian activity done for income or pay

✓ Billable / specificPOA exempt

Y99.0 is a valid, billable ICD-10-CM code for civilian activity done for income or pay. 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 Y99.0

Y99.0 is the ICD-10-CM diagnosis code for civilian activity done for income or pay. 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), Y99.0 is specifically for civilian activity done for income or pay. Related codes cover military activity (Y99.1), Volunteer activity (Y99.2), other external cause status (Y99.8) and unspecified external cause status (Y99.9).

Don't report Y99.0 together with the conditions in its Excludes1 note: military activity (Y99.1) and volunteer activity (Y99.2).

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 E000.0 (civilian activity done for income or pay).

Coding notes

Applicable toConditions and synonyms classified to this code
  • Civilian activity done for financial or other compensation
Excludes1Not coded here — never report together with this code
  • military activity (Y99.1)
  • volunteer activity (Y99.2)

Notes that apply from higher levels

Instructions written at a parent level also apply to Y99.0.

› 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

6 entries

Terms in the official ICD-10-CM index that lead to Y99.0.

Codes whose notes reference Y99.0

ICD-9-CM equivalent

Converter →
  • E000.0Civilian activity done for income or payexact

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 Y99.0

Is Y99.0 billable?

Yes. Y99.0 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).

Can Y99.0 be used as a principal diagnosis?

Yes. The Medicare Code Editor doesn't restrict Y99.0 as a principal diagnosis.

Is Y99.0 a CC or MCC?

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

What is the ICD-9 code for Y99.0?

The CMS General Equivalence Mappings map Y99.0 to ICD-9-CM E000.0.