I70.643 — Atherosclerosis of nonbiological bypass graft(s) of the left leg with ulceration of ankle
Is I70.643 billable?
Yes — I70.643 is billable for FY2027. I70.643 is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. I70.643 may be submitted for encounters from October 1, 2026 through September 30, 2027.
I70.643 at a glance
| Code | I70.643 |
|---|---|
| Description | Atherosclerosis of nonbiological bypass graft(s) of the left leg with ulceration of ankle |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
Which MS-DRGs does I70.643 group to?
I70.643 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
As a secondary diagnosis, I70.643 is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.
How is I70.643 listed in the Alphabetic Index?
These are the routes through the Alphabetic Index that lead to I70.643. They show the wording a clinician may have documented, which often differs from the Tabular description.
- Arteriosclerosis, arteriosclerotic › extremities › bypass graft › nonbiological graft › leg › left › with › ulceration › ankle (diffuse) (obliterans) (of) (senile) (with calcification)
- Arteriosclerosis, arteriosclerotic › with › critical limb ischemia › bypass graft › nonbiological graft › leg › left › with › ulceration › ankle (diffuse) (obliterans) (of) (senile) (with calcification)
Use additional code — inherited from I70
Report an additional code alongside I70.643 to fully describe the condition. I70.643 is sequenced first.
Use additional code — inherited from I70.6
Report an additional code alongside I70.643 to fully describe the condition. I70.643 is sequenced first.
- code, if applicable, to identify chronic total occlusion of artery of extremity (I70.92)
Use additional code — inherited from I70.64
Report an additional code alongside I70.643 to fully describe the condition. I70.643 is sequenced first.
- code to identify severity of ulcer (L97.-)
Excludes2 — not included here — inherited from Chapter 9
The conditions below are not part of I70.643, but a patient may have both at the same time. When documentation supports it, I70.643 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 I70.643, but a patient may have both at the same time. When documentation supports it, I70.643 and the excluded code may both be reported.
How long has I70.643 existed?
I70.643 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 I70.64 family? (6)
- I70.641Atherosclerosis of nonbiological bypass graft(s) of the left leg with ulceration of thigh
- I70.642Atherosclerosis of nonbiological bypass graft(s) of the left leg with ulceration of calf
- I70.644Atherosclerosis of nonbiological bypass graft(s) of the left leg with ulceration of heel and midfoot
- I70.645Atherosclerosis of nonbiological bypass graft(s) of the left leg with ulceration of other part of foot
- I70.648Atherosclerosis of nonbiological bypass graft(s) of the left leg with ulceration of other part of lower leg
- I70.649Atherosclerosis of nonbiological bypass graft(s) of the left leg with ulceration of unspecified site