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ICD-10-CM 2027 diagnosis code

I73Other peripheral vascular diseases

Not billable — use a more specific code

I73 is a header code, so it can't be reported by itself. Choose one of the 4 more specific codes beneath it.

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 I73

I73 is the ICD-10-CM diagnosis code for other peripheral vascular diseases. It belongs to block I70-I79 (diseases of arteries, arterioles and capillaries) and chapter 9 (diseases of the circulatory system). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: I73.0 (syndrome), I73.1 (disease]), I73.8 (diseases) and I73.9 (unspecified).

The conditions in its Excludes2 note aren't part of I73, but may be coded alongside it if the patient has both: chilblains (T69.1), frostbite (T33-T34), immersion hand or foot (T69.0-) and spasm of cerebral artery (G45.9).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under I73

Coding notes

Excludes2Not included here — may be reported together if both conditions exist

Notes that apply from higher levels

Instructions written at a parent level also apply to I73.

Broader instructions also apply from Chapter 9: Diseases of the circulatory system.

Codes whose notes reference I73

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 I73

Is I73 billable?

No. I73 is a header code. Report one of its more specific subcodes instead.