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I70.66

Atherosclerosis of nonbiological bypass graft(s) of the extremities with gangrene

Not billable — category only FY2026 2025-10-01 → 2026-09-30
Exclusions 18 never code together
I70code
Excludes2
  • arteriosclerotic cardiovascular disease (I25.1-)I25.1-
  • arteriosclerotic heart disease (I25.1-)I25.1-
  • atheroembolism (I75.-)I75.-
  • cerebral atherosclerosis (I67.2)I67.2
  • coronary atherosclerosis (I25.1-)I25.1-
  • mesenteric atherosclerosis (K55.1)K55.1
  • precerebral atherosclerosis (I67.2)I67.2
  • primary pulmonary atherosclerosis (I27.0)I27.0
I00-I99chapter
Excludes2
  • certain conditions originating in the perinatal period (P04-P96)P04-P96
  • certain infectious and parasitic diseases (A00-B99)A00-B99
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)O00-O9A
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)Q00-Q99
  • endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
  • injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
  • neoplasms (C00-D49)C00-D49
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)R00-R94
  • systemic connective tissue disorders (M30-M36)M30-M36
  • transient cerebral ischemic attacks and related syndromes (G45.-)G45.-

Excludes2 — not included here, but the patient may have both. Code both when documented.

Instructional notes 21
I70code
Includes
  • arteriolosclerosis
  • arterial degeneration
  • arteriosclerosis
  • arteriosclerotic vascular disease
  • arteriovascular degeneration
  • atheroma
  • endarteritis deformans or obliterans
  • senile arteritis
  • senile endarteritis
  • vascular degeneration
Use additional code
  • code to identify:
  • exposure to environmental tobacco smoke (Z77.22)Z77.22
  • history of tobacco dependence (Z87.891)Z87.891
  • occupational exposure to environmental tobacco smoke (Z57.31)Z57.31
  • tobacco dependence (F17.-)F17.-
  • tobacco use (Z72.0)Z72.0
I70.66code
Includes
  • any condition classifiable to I70.61-, I70.62-, I70.63-, I70.64-, I70.65I70.61-I70.62-I70.63-I70.64-I70.65
  • chronic limb-threatening ischemia of nonbiological bypass graft(s) of the extremities with gangrene
  • critical limb ischemia of nonbiological bypass graft(s) of the extremities with gangrene
Use additional code
  • code to identify the severity of any ulcer (L97.-, L98.49-), if applicableL97.-L98.49-
I70.6code
Use additional code
  • code, if applicable, to identify chronic total occlusion of artery of extremity (I70.92)I70.92
Index entries leading here filed at null

No alphabetic index entry points at this code.

Alongside this code 7 same parent — I70.6
I70.60 Unsp athscl nonbiological bypass graft(s) of the extremities category I70.61 Athscl nonbiol bypass of the extremities w intrmt claud category I70.62 Athscl nonbiological bypass of the extremities w rest pain category I70.63 Athscl nonbiological bypass of the right leg w ulceration category I70.64 Athscl nonbiological bypass of the left leg w ulceration category I70.65 Athscl nonbiological bypass of extremity w ulceration I70.69 Oth athscl nonbiological bypass graft(s) of the extremities category
Subordinate codes 5
I70.661 Athscl nonbiol bypass of the extrm w gangrene, right leg I70.662 Athscl nonbiol bypass of the extrm w gangrene, left leg I70.663 Athscl nonbiol bypass of the extrm w gangrene, bi legs I70.668 Athscl nonbiol bypass of the extrm w gangrene, oth extremity I70.669 Athscl nonbiol bypass of the extrm w gangrene, unsp extrm
Additional references
AHA Coding Clinic® Licence required

Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.

Risk adjustment

Maps to no condition category in any loaded model.

Presence is a property of the code. Untick a model to hide it everywhere.

This code

Billable
no
Code set
FY2026
Parent
I70.6
Block
I70-I79
Siblings
7
Subordinate
5

Present FY2024–FY2027.