ICDcodes.org
FY2027

I70.599 — Other atherosclerosis of nonautologous biological bypass graft(s) of the extremities, unspecified extremity

BillableUnspecified

Is I70.599 billable?

Yes, but I70.599 is an unspecified code. I70.599 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, I70.599 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting I70.599 — the more specific alternatives are listed below.

I70.599 at a glance

CodeI70.599
DescriptionOther atherosclerosis of nonautologous biological bypass graft(s) of the extremities, unspecified extremity
BillableYes
Code setICD-10-CM FY2027
Valid for encountersOctober 1, 2026 – September 30, 2027

Which MS-DRGs does I70.599 group to?

I70.599 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 I70.599 listed in the Alphabetic Index?

These are the routes through the Alphabetic Index that lead to I70.599. They show the wording a clinician may have documented, which often differs from the Tabular description.

  • Arteriosclerosis, arteriosclerotic › extremities › bypass graft › nonautologous biological graft › leg › specified type NEC (diffuse) (obliterans) (of) (senile) (with calcification)

Use additional code — inherited from I70

Report an additional code alongside I70.599 to fully describe the condition. I70.599 is sequenced first.

  • 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)

Use additional code — inherited from I70.5

Report an additional code alongside I70.599 to fully describe the condition. I70.599 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 I70.599, but a patient may have both at the same time. When documentation supports it, I70.599 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 I70.599, but a patient may have both at the same time. When documentation supports it, I70.599 and the excluded code may both be reported.

  • 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)

How long has I70.599 existed?

I70.599 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 I70.59 family? (4)