I70.20
Unspecified atherosclerosis of native arteries of extremities
Not billable — category only FY2026 2025-10-01 → 2026-09-30
This is the unspecified option. 7 more
specific codes sit alongside it. Worth
checking whether the documentation supports one of them.
Exclusions 19 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
I70.2code
Excludes2
- atherosclerosis of bypass graft of extremities (I70.30-I70.79)I70.30-I70.79
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 18
I70.2code
Inclusion terms
- Mönckeberg's (medial) sclerosis
Use additional code
- code, if applicable, to identify chronic total occlusion of artery of extremity (I70.92)I70.92
I70code
Includes
- arteriolosclerosis
- arterial degeneration
- arteriosclerosis
- arteriosclerotic vascular disease
- arteriovascular degeneration
- atheroma
- endarteritis deformans or obliterans
- senile arteritis
- senile endarteritis
- vascular degeneration
Index entries leading here filed at null
No alphabetic index entry points at this code.
Alongside this code 7 same parent — I70.2
I70.21 Athscl native arteries of extremities w intermittent claud category I70.22 Athscl native arteries of extremities w rest pain category I70.23 Atherosclerosis of native arteries of right leg w ulceration category I70.24 Atherosclerosis of native arteries of left leg w ulceration category I70.25 Athscl native arteries of extremities w ulceration I70.26 Atherosclerosis of native arteries of extremities w gangrene category I70.29 Other atherosclerosis of native arteries of extremities category
Subordinate codes 5
I70.201 Unsp athscl native arteries of extremities, right leg I70.202 Unsp athscl native arteries of extremities, left leg I70.203 Unsp athscl native arteries of extremities, bilateral legs I70.208 Unsp athscl native arteries of extremities, oth extremity I70.209 Unsp athscl native arteries of extremities, unsp extremity
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.