Y99.2 – Volunteer activity

ICD-10-CM 2027 diagnosis code · Supplementary factors related to causes of morbidity classified elsewhere

Billable code

ICD-10-CM code Y99.2

Code: Y99.2 (claims format: Y992)
Description: Volunteer activity
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 20. External causes of morbidity (V00-Y99)
Block: Y90-Y99 Supplementary factors related to causes of morbidity classified elsewhere
Parent codes: Y99

Notes for Y99.2

Excludes1 (not coded here):

activity of child or other family member assisting in compensated work of other family member (Y99.8)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Y99 – External cause status

Notes:

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.

Block Y90-Y99

Notes:

These categories may be used to provide supplementary information concerning causes of morbidity. They are not to be used for single-condition coding.

Related codes in Y99

Y99.0 – Civilian activity done for income or payBillable
Y99.1 – Military activityBillable
Y99.8 – Other external cause statusBillable
Y99.9 – Unspecified external cause statusBillable

Frequently asked questions

What is ICD-10 code Y99.2?

Y99.2 is the ICD-10-CM code for volunteer activity, in the block Y90-Y99 (Supplementary factors related to causes of morbidity classified elsewhere).

Is Y99.2 a billable code?

Yes. Y99.2 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does Y99.2 belong to?

It belongs to category Y99 – External cause status.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.