ICD-10-CM 2027 diagnosis code

I78Diseases of capillaries

Not billable — use a more specific code

I78 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 I78

I78 is the ICD-10-CM diagnosis code for diseases of capillaries. 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: I78.0 (telangiectasia), I78.1 (non-neoplastic), I78.8 (capillaries) and I78.9 (unspecified).

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 I78

Notes that apply from higher levels

Instructions written at a parent level also apply to I78.

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

Code history

2016
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2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about I78

Is I78 billable?: No. I78 is a header code. Report one of its more specific subcodes instead.