I73 vs T69.1

I73 (Other peripheral vascular diseases) compared with T69.1 (Chilblains), from the official CMS tabular data. Both may be reported when both conditions are documented (Excludes2).

Can these codes be reported together?

Yes, when both are documented. I73 carries an Excludes2 note covering T69.1: “chilblains (T69.1)”

Excludes2 marks distinct conditions — both may be reported when both are documented.

Side by side

	I73Other peripheral vascular diseases	T69.1Chilblains
Billing status	Non-billable header Report instead: I73.00, I73.01, I73.1, I73.81, I73.89	Non-billable header Report instead: T69.1XXA, T69.1XXD, T69.1XXS
Classification	I00-I99 — Diseases of the Circulatory System (I00-I99)	S00-T88 — Injury, Poisoning and Certain Other Consequences of External Causes (S00-T88)
Definition	Other peripheral vascular diseases is a non-billable ICD-10-CM category code (I73).	Chilblains is a non-billable ICD-10-CM category code (T69.1).
7th character	—	The appropriate 7th character is to be added to each code from category T69
Use additional code	—	code to identify source of exposure: Exposure to excessive cold of man-made origin (W93) Exposure to excessive cold of natural origin (X31)

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Derived from the official CMS ICD-10-CM tabular data (FY2026). Not billing advice; verify sequencing rules for the encounter. All data sources