I70.521 — Atherosclerosis of nonautologous biological bypass graft(s) of the extremities with rest pain, right leg
Is I70.521 billable?
Yes — I70.521 is billable for FY2027. I70.521 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. I70.521 may be submitted for encounters from October 1, 2026 through September 30, 2027.
I70.521 at a glance
| Code | I70.521 |
|---|---|
| Description | Atherosclerosis of nonautologous biological bypass graft(s) of the extremities with rest pain, right leg |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does I70.521 group to?
I70.521 sits in MDC 05 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 299Peripheral Vascular Disorders with MCCmedical
- 300Peripheral Vascular Disorders with CCmedical
- 301Peripheral Vascular Disorders without CC/MCCmedical
How is I70.521 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to I70.521. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Arteriosclerosis, arteriosclerotic › with › critical limb ischemia › bypass graft › nonautologous biological graft › leg › right (diffuse) (obliterans) (of) (senile) (with calcification)
- Arteriosclerosis, arteriosclerotic › extremities › bypass graft › nonautologous biological graft › leg › right › with › rest pain (diffuse) (obliterans) (of) (senile) (with calcification)
- Arteriosclerosis, arteriosclerotic › with › critical limb ischemia › bypass graft › nonautologous biological graft › leg › right › with › rest pain (diffuse) (obliterans) (of) (senile) (with calcification)
Use additional code — inherited from I70
Report an additional code alongside I70.521 to fully describe the condition. I70.521 is sequenced first.
Use additional code — inherited from I70.5
Report an additional code alongside I70.521 to fully describe the condition. I70.521 is sequenced first.
- code, if applicable, to identify chronic total occlusion of artery of extremity (I70.92)
Excludes2 — not included here — inherited from Chapter 9
The conditions below are not part of I70.521, but a patient may have both at the same time. When documentation supports it, I70.521 and the excluded code may both be reported.
- 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.-)
Excludes2 — not included here — inherited from I70
The conditions below are not part of I70.521, but a patient may have both at the same time. When documentation supports it, I70.521 and the excluded code may both be reported.
How long has I70.521 existed?
I70.521 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.
What other codes are in the I70.52 family? (4)
- I70.522Atherosclerosis of nonautologous biological bypass graft(s) of the extremities with rest pain, left leg
- I70.523Atherosclerosis of nonautologous biological bypass graft(s) of the extremities with rest pain, bilateral legs
- I70.528Atherosclerosis of nonautologous biological bypass graft(s) of the extremities with rest pain, other extremity
- I70.529Atherosclerosis of nonautologous biological bypass graft(s) of the extremities with rest pain, unspecified extremity