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ICD-10-CM I70.702: Unspecified atherosclerosis of other type of bypass graft(s) of the extremities, left leg

I70.702 is the billable ICD-10-CM code for unspecified atherosclerosis of other type of bypass graft(s) of the extremities, left leg, in category I70 (Atherosclerosis) of the Diseases of arteries, arterioles and capillaries section. As a principal diagnosis it groups to MS-DRG 299 Peripheral Vascular Disorders with MCC, MS-DRG 300 Peripheral Vascular Disorders with CC, MS-DRG 301 Peripheral Vascular Disorders without CC/MCC (MDC 05 MDC 05: Diseases and Disorders of the Circulatory System). 9 LCD billing and coding articles list it as covered.

Compiled from CMS files by the QuickIntell RCM Editorial Team · Data effective · Method: reference methodology · Report a data correction

Data currency: ICD-10-CM code descriptions: FY2027 (effective October 1, 2026); IPPS Table 5 (MS-DRG weights): v44 FY2027 (final rule + CN3) (effective October 1, 2026); ICD-10-CM to HCC mapping: PY2027 initial ICD-10-CM mappings (dates of service 2026) (payment year 2027); Medicare Coverage Database billing and coding articles: MCD release October 8, 2026 (effective October 4, 2026). Next CMS release: FY2028 code files, effective October 1, 2027 for the ICD-10-CM code descriptions; FY2028 final rule (August 2027), effective October 1, 2027; an April 1 interim grouper update when CMS issues one for the IPPS Table 5 (MS-DRG weights); PY2028 advance notice (February 2027) and the PY2027 midyear final mapping (spring 2027) for the ICD-10-CM to HCC mapping; weekly, every Thursday for the Medicare Coverage Database billing and coding articles.

Code
I70.702
billable FY2027 ICD-10-CM code
Category
I70 Atherosclerosis
Chapter
9: Diseases of the circulatory system (I00-I99)
CC/MCC (MS-DRG v44)
Neither
CMS-HCC V28
Not mapped
POA reporting
Required

Tabular list notes for I70.702

The tabular list has no notes on I70.702 itself; the notes below apply from its parent headings.

Inherited from I70 (Atherosclerosis)

Includes
  • arteriolosclerosis
  • arterial degeneration
  • arteriosclerosis
  • arteriosclerotic vascular disease
  • arteriovascular degeneration
  • atheroma
  • endarteritis deformans or obliterans
  • senile arteritis
  • senile endarteritis
  • vascular degeneration
Excludes2 (not part of this condition, may be coded together)
  • 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)
Use additional code
  • 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)

Inherited from I70.7 (Atherosclerosis of other type of bypass graft(s) of the extremities)

Use additional code
  • code, if applicable, to identify chronic total occlusion of artery of extremity (I70.92)

MS-DRG grouping when I70.702 is the principal diagnosis

MS-DRG v44 groups for I70.702 as principal diagnosis
MDCMS-DRGs
05 MDC 05: Diseases and Disorders of the Circulatory System299300301

The final group also depends on procedures, secondary diagnoses and discharge status; the MS-DRG lookup for I70.702 shows the full grouping logic.

CC/MCC status and inpatient edits

I70.702 is neither a CC nor an MCC under MS-DRG v44, so as a secondary diagnosis it does not raise the MS-DRG severity level. Check I70.702 against a principal diagnosis.

  • Present on admission: a POA indicator is required on inpatient claims.
  • Medicare Code Editor: age conflict: adult diagnosis (age 15 to 124).

CMS-HCC V28 risk adjustment

I70.702 does not map to a payment HCC in the PY2027 CMS-HCC V28 model, so on its own it does not change a Medicare Advantage risk score.

LCD billing and coding articles that list I70.702

9 current Medicare billing and coding articles list I70.702 among the diagnoses that support medical necessity for the services they cover.

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Frequently asked questions

What does ICD-10-CM I70.702 mean?

I70.702 means unspecified atherosclerosis of other type of bypass graft(s) of the extremities, left leg. It is one of 25 billable codes under I70, atherosclerosis.

Which MS-DRG does I70.702 group to?

As the principal diagnosis, I70.702 groups to MS-DRG 299 Peripheral Vascular Disorders with MCC, MS-DRG 300 Peripheral Vascular Disorders with CC, MS-DRG 301 Peripheral Vascular Disorders without CC/MCC (MDC 05 MDC 05: Diseases and Disorders of the Circulatory System) under MS-DRG v44, before procedures and secondary diagnoses are applied.

Sources

Every figure on this page is taken from the CMS publications below, as released by the Centers for Medicare & Medicaid Services. Projection built 2026-10-10. Verify against the primary file before billing or contracting decisions. The reference methodology explains how each figure is computed from these files.

Disclaimer

The descriptor and notes are reproduced from the FY2027 ICD-10-CM files; MS-DRG, CC/MCC and HCC facts come from the CMS FY2027 and PY2027 tables. Code from the medical record and the ICD-10-CM Official Guidelines. Not legal, clinical or billing advice.

Found a figure that does not match the CMS file? Report a data correction with the CMS file and the value you expected; the request reaches the editorial team through the contact form.