I70.642 – Atherosclerosis of nonbiological bypass graft(s) of the left leg with ulceration of calf

ICD-10-CM 2027 diagnosis code · Diseases of arteries, arterioles and capillaries

Billable code

ICD-10-CM code I70.642

Code: I70.642 (claims format: I70642)
Description: Atherosclerosis of nonbiological bypass graft(s) of the left leg with ulceration of calf
Short description: Athscl nonbiol bypass of the left leg w ulceration of calf
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 9. Diseases of the circulatory system (I00-I99)
Block: I70-I79 Diseases of arteries, arterioles and capillaries
Parent codes: I70 › I70.6 › I70.64

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

I70 – Atherosclerosis

Includes:

arteriolosclerosis
arterial degeneration
arteriosclerosis
arteriosclerotic vascular disease
arteriovascular degeneration
atheroma
endarteritis deformans or obliterans
senile arteritis
senile endarteritis
vascular degeneration

Excludes2 (not included here):

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 code:

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)

I70.6 – Atherosclerosis of nonbiological bypass graft(s) of the extremities

Use additional code:

code, if applicable, to identify chronic total occlusion of artery of extremity (I70.92)

I70.64 – Atherosclerosis of nonbiological bypass graft(s) of the left leg with ulceration

Includes:

any condition classifiable to I70.612 and I70.622
chronic limb-threatening ischemia of nonbiological bypass graft(s) of the left leg with ulceration
critical limb ischemia of nonbiological bypass graft(s) of the left leg with ulceration

Use additional code:

code to identify severity of ulcer (L97.-)

Index terms for I70.642

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in I70.64

Frequently asked questions

What is ICD-10 code I70.642?

I70.642 is the ICD-10-CM code for atherosclerosis of nonbiological bypass graft(s) of the left leg with ulceration of calf, in the block I70-I79 (Diseases of arteries, arterioles and capillaries).

Is I70.642 a billable code?

Yes. I70.642 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does I70.642 belong to?

It belongs to category I70 – Atherosclerosis.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.