Is ICD-10-CM code Y99 billable?

No, Y99 (External cause status) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code Y99 belong to?

Y99 belongs to Chapter 20 of the ICD-10-CM tabular list: V00–Y99 (External Causes of Morbidity).

Y99

Non-Billable

ChapterV00–Y99

Rankcategory

Description

External cause status

About ICD-10-CM code Y99

The ICD-10-CM tabular list places External cause status at code Y99, inside V00-Y99 External Causes of Morbidity, within Supplementary factors related to causes of morbidity classified elsewhere (Y90-Y99). You should not submit this code on claims since it lacks billing specificity, use a child code.

Use a more specific code (5 billable)

Y99.0Civilian activity done for income or pay Y99.1Military activity Y99.2Volunteer activity Y99.8Other external cause status Y99.9Unspecified external cause status

Metadata & Insights

•Non-billable category (requires more specific sub-code).
•Chapter 20: External Causes of Morbidity (V00-Y99).

Clinical Hierarchy

BillableHas subcodes

CH20External causes of morbidity (V00-Y99)

Y90-Y99Supplementary factors related to causes of morbidity classified elsewhere (Y90-Y99)

Y99External cause statusNot billable

Y99.0Civilian activity done for income or payBillable

Y99.1Military activityBillable

Y99.2Volunteer activityBillable

Y99.8Other external cause statusBillable

Y99.9Unspecified external cause statusBillable

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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