Y99.9 — Unspecified external cause status

Y99.9

What this code means

An external-cause code recording that the person's status (such as civilian or military) at the time of injury is unspecified.

Also called: unspecified external cause status.

When this code is used

Used as an additional code for unspecified external cause status.

Where it sits in ICD-10-CM

Code Y99.9 belongs to Chapter 20: External causes of morbidity, which covers codes V00–Y99 in the FY2027 ICD-10-CM tabular list. The official description above is copied verbatim from the CDC/NCHS FY2027 code file.

Frequently asked questions

This guide explains ICD-10-CM codes in plain language for patients, students and other readers. It is educational information only — not coding, billing or medical advice. The code recorded for any real encounter is assigned from the full clinical documentation by the treating team and qualified coders, and only they can decide which code fits a specific case.

More codes in Chapter 20

V89.2XXA — Person injured in unspecified motor-vehicle accident, traffic, initial encounterW01.0XXA — Fall on same level from slipping, tripping and stumbling without subsequent striking against object, initial encounterW10.9XXA — Fall (on) (from) unspecified stairs and steps, initial encounterW19.XXXA — Unspecified fall, initial encounterW54.0XXA — Bitten by dog, initial encounterW55.01XA — Bitten by cat, initial encounter

← All Chapter 20 codes · ICD-10 Codes home