Critical limb ischemia, also known as chronic limb-threatening ischemia, is a clinical syndrome of peripheral artery disease of the lower limbs with ischemic pain at rest and ischemic tissue such as nonhealing ulcers or gangrene. Critical limb ischemia (CLI) does not happen overnight and does occur over time. Patients are at a much higher risk of limb loss and cardiovascular events with CLI. Effective with discharges October 1,2020, there are new inclusion terms in the Tabular List within category I70, Atherosclerosis, to identify codes for critical limb ischemia. In the Alphabetic Index, there are also new subentries to direct users to category I70. Critical limb ischemia without further specification is coded to atherosclerosis of the extremities with rest pain.1
Alphabetic Index:
Ischemia, ischemic I99.8
limb-threatening, chronic – see Arteriosclerosis, with critical limb ischemia
Tabular List:
Arteriosclerosis, arteriosclerotic (diffuse) (obliterans) (of) (senile) (with calcification) I70.90
with
chronic limb-threatening ischemia – see Arteriosclerosis, with critical limb ischemia
I70.22 Atherosclerosis of native arteries of extremities with rest pain
- Includes any condition classifiable to I70.21-
- chronic limb-threatening ischemia NOS of native arteries of extremities
- chronic limb-threatening ischemia of native arteries of extremities with rest pain
- critical limb ischemia NOS of native arteries of extremities
- critical limb ischemia of native arteries of extremities with rest pain
- I70.221 Atherosclerosis of native arteries of extremities with rest pain, right leg
- I70.222 Atherosclerosis of native arteries of extremities with rest pain, left leg
- I70.223 Atherosclerosis of native arteries of extremities with rest pain, bilateral legs
- I70.228 Atherosclerosis of native arteries of extremities with rest pain, other extremity
- I70.229 Atherosclerosis of native arteries of extremities with rest pain, unspecified extremity
1 Coding clinic for ICD-10-CM/PCS, Fourth Quarter 2020:Page 98