Coding and coverage · ICD-10-CM

I70 › I70.3 › I70.36

I70.363 Atherosclerosis of unspecified type of bypass graft(s) of the extremities with gangrene, bilateral legs

BillableCMS-HCC V28: HCC 263age >= 150Chapter 9
Check coverage with this diagnosis

Instructional notes

Chapter 9

Excludes2Not included here: the patient may have both; report both when both are present.
  • 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.-)

I70

Excludes2Not included here: the patient may have both; report both when both are present.
  • 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)
Use additional codeAdd a second code for the full picture.
  • 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)
Includes
  • arteriolosclerosis
  • arterial degeneration
  • arteriosclerosis
  • arteriosclerotic vascular disease
  • arteriovascular degeneration
  • atheroma
  • endarteritis deformans or obliterans
  • senile arteritis
  • senile endarteritis
  • vascular degeneration

I70.3

Excludes1Not coded here: never report with this code, except when the two conditions are unrelated.
  • embolism or thrombus of bypass graft(s) of extremities (T82.8-)
Use additional codeAdd a second code for the full picture.
  • code, if applicable, to identify chronic total occlusion of artery of extremity (I70.92)

I70.36

Use additional codeAdd a second code for the full picture.
  • code to identify the severity of any ulcer (L97.-, L98.49-), if applicable
Includes
  • any condition classifiable to I70.31-, I70.32-, I70.33-, I70.34-, I70.35
  • chronic limb-threatening ischemia of unspecified type of bypass graft(s) of the extremities with gangrene
  • critical limb ischemia of unspecified type of bypass graft(s) of the extremities with gangrene

Chapter 9: Diseases of the circulatory system · I70-I79 Diseases of arteries, arterioles and capillaries (I70-I79)

Source: ICD-10-CM FY 2027 code descriptions and tabular list (CMS and CDC National Center for Health Statistics), effective 2026-10-01 through 2027-09-30 · CMS ICD-10 files. HCC mapping: CMS-HCC V28, payment year 2027. As of 2026-11-04.

Coverage and payment depend on the claim details; confirm with the Medicare Administrative Contractor.