DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

I79 Disorders of arteries, arterioles and capillaries in diseases classified elsewhere

  • Header · not billable

I79 is not billable. The category heads 3 billable codes in FY2027: the 3 codes directly below it.

Where it sits

  1. Chapter 9 Diseases of the circulatory system (I00-I99)
  2. I70-I79 Diseases of arteries, arterioles and capillaries (I70-I79)
  3. I79 Disorders of arteries, arterioles and capillaries in diseases classified elsewhere
Billable codes
3
Subdivisions
3
CC / MCC codes
0 / 0
HCC V28 codes
0
New FY2027
0
Index entries
5

Codes in I79

  1. I79.0
    Aneurysm of aorta in diseases classified elsewhere
    Billable
    Excludes1 1, Code first 1

    Excludes1

    • syphilitic aneurysm (A52.01) A52.01

    Code first

    • underlying disease
  2. I79.1
    Aortitis in diseases classified elsewhere
    Billable
    Excludes1 1, Code first 1

    Excludes1

    • syphilitic aortitis (A52.02) A52.02

    Code first

    • underlying disease
  3. I79.8
    Other disorders of arteries, arterioles and capillaries in diseases classified elsewhere
    Billable
    Excludes1 3, Code first 2

    Excludes1

    • diabetic (peripheral) angiopathy (E08-E13 with .51-.52) E08 E13
    • syphilitic endarteritis (A52.09) A52.09
    • tuberculous endarteritis (A18.89) A18.89

    Code first

    • underlying disease, such as:
    • amyloidosis (E85.-) E85

Sources of each column.

Instructions

Notes that also apply

Chapter 9 instructions (Excludes2 10): printed on the chapter 9 page.

Index entries

  • Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)syphilitic (aorta)congenital (late) → A50.54 [I79.0]
  • Aortitis (nonsyphilitic) (calcific)syphiliticcongenital → A50.54 [I79.1]
  • Endarteritis (bacterial, subacute) (infective)syphiliticcongenital → A50.54 [I79.8]
  • Syphilis, syphilitic (acquired)aneurysm (aorta) (ruptured)congenital → A50.54 [I79.0]
  • Degeneration, degenerativecapillaries (fatty)amyloid → E85.89 [I79.8]

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy