Alphabetic Index FY2027

I70.56

Atherosclerosis of nonautologous biological bypass graft(s) of the extremities with gangrene

FY2027Chapter 9: Diseases of the circulatory system/I70–I79 Diseases of arteries, arterioles and capillaries

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

I70.56 is a non-billable ICD-10-CM code header for atherosclerosis of nonautologous biological bypass graft(s) of the extremities with gangrene. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are I70.561 Atherosclerosis of nonautologous biological bypass graft(s) of the extremities with gangrene, right leg; I70.562 Atherosclerosis of nonautologous biological bypass graft(s) of the extremities with gangrene, left leg; I70.563 Atherosclerosis of nonautologous biological bypass graft(s) of the extremities with gangrene, bilateral legs; I70.568 Atherosclerosis of nonautologous biological bypass graft(s) of the extremities with gangrene, other extremity and 1 more. Its coding notes include a Use additional code instruction and 18 Excludes2 entries.

Use additional code

Add the listed code as a secondary code, if known.

This code
  • code to identify the severity of any ulcer (L97.-, L98.49-), if applicable
Inherited from I70.5 Atherosclerosis of nonautologous biological bypass graft(s) of the extremities
  • code, if applicable, to identify chronic total occlusion of artery of extremity (I70.92)
Inherited from I70 Atherosclerosis
  • code to identify:
    • exposure to environmental tobacco smoke (Z77.22)
    • history of tobacco dependence (Z87.891)
    • occupational exposure to environmental tobacco smoke (Z57.31)
    • tobacco dependence (F17.-)
    • tobacco use (Z72.0)

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

Inherited from I70 Atherosclerosis
  • arteriosclerotic cardiovascular disease (I25.1-)
  • arteriosclerotic heart disease (I25.1-)
  • atheroembolism (I75.-)
  • cerebral atherosclerosis (I67.2)
  • coronary atherosclerosis (I25.1-)
  • mesenteric atherosclerosis (K55.1)
  • precerebral atherosclerosis (I67.2)
  • primary pulmonary atherosclerosis (I27.0)
Also from chapter/block level (10 notes)
Inherited from Chapter 9 Diseases of the circulatory system
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • systemic connective tissue disorders (M30-M36)
  • transient cerebral ischemic attacks and related syndromes (G45.-)

Includes

Further defines or gives examples of the content of the category.

This code
  • any condition classifiable to I70.51-, I70.52-, and I70.53-, I70.54-, I70.55
  • chronic limb-threatening ischemia of nonautologous biological bypass graft(s) of the extremities with gangrene
  • critical limb ischemia of nonautologous biological bypass graft(s) of the extremities with gangrene
Inherited from I70 Atherosclerosis
  • arteriolosclerosis
  • arterial degeneration
  • arteriosclerosis
  • arteriosclerotic vascular disease
  • arteriovascular degeneration
  • atheroma
  • endarteritis deformans or obliterans
  • senile arteritis
  • senile endarteritis
  • vascular degeneration

More specific codes under I70.56 5