I70.762 ICD-10-CM Code: Atherosclerosis of other type of bypass graft(s) of the extremities with gangrene, left leg
I70.762 maps to CMS-HCC V28 263. A source-labeled RAF reference is available. Confirm the documented diagnosis and applicable coding requirements. MEAT criteria · RAF Calculator · HCC Buddy coding tools
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FY 2026 Apr update / Diseases of the circulatory system (I00-I99) / Diseases of arteries, arterioles and capillaries (I70-I79)
I70.762
Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidanceAtherosclerosis of other type of bypass graft(s) of the extremities with gangrene, left leg
Hardening and narrowing of a surgical bypass graft in the left leg that has progressed to tissue death (gangrene) due to poor blood flow.
Buddy Insight
Atherosclerosis of other type bypass graft with gangrene of the left leg represents the most severe stage of peripheral arterial disease (Fontaine Stage IV with tissue necrosis).
CMS-HCC V28
MappedHCC 263
Code-level coefficient reference
CMS-HCC V24
HistoricalHistorical
Not used for CY2026 payment
ACA/HHS
N/A—
Not mapped
ESRD/PACE
N/A—
Not mapped
RXHCC
N/A—
Not mapped
Code Book Path
Inclusion Terms
OfficialNo inclusion terms are included in this display for I70.762. Check the code and parent instructions in the Code Book.
Excludes 2
Official- certain conditions originating in the perinatal period (P04-P96)Inherited from I00-I99, I70
- certain infectious and parasitic diseases (A00-B99)Inherited from I00-I99, I70
- complications of pregnancy, childbirth and the puerperium (O00-O9A)Inherited from I00-I99, I70
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)Inherited from I00-I99, I70
- endocrine, nutritional and metabolic diseases (E00-E88)Inherited from I00-I99, I70
- injury, poisoning and certain other consequences of external causes (S00-T88)Inherited from I00-I99, I70
- neoplasms (C00-D49)Inherited from I00-I99, I70
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)Inherited from I00-I99, I70
- systemic connective tissue disorders (M30-M36)Inherited from I00-I99, I70
- transient cerebral ischemic attacks and related syndromes (G45.-)Inherited from I00-I99, I70
- arteriosclerotic cardiovascular disease (I25.1-)Inherited from I00-I99, I70
- arteriosclerotic heart disease (I25.1-)Inherited from I00-I99, I70
- atheroembolism (I75.-)Inherited from I00-I99, I70
- cerebral atherosclerosis (I67.2)Inherited from I00-I99, I70
- coronary atherosclerosis (I25.1-)Inherited from I00-I99, I70
- mesenteric atherosclerosis (K55.1)Inherited from I00-I99, I70
- precerebral atherosclerosis (I67.2)Inherited from I00-I99, I70
- primary pulmonary atherosclerosis (I27.0)Inherited from I00-I99, I70
Related Codes
Includes
Official- arteriolosclerosisInherited from I70, I70.76
- arterial degenerationInherited from I70, I70.76
- arteriosclerosisInherited from I70, I70.76
- arteriosclerotic vascular diseaseInherited from I70, I70.76
- arteriovascular degenerationInherited from I70, I70.76
- atheromaInherited from I70, I70.76
- endarteritis deformans or obliteransInherited from I70, I70.76
- senile arteritisInherited from I70, I70.76
- senile endarteritisInherited from I70, I70.76
- vascular degenerationInherited from I70, I70.76
- any condition classifiable to I70.71-, I70.72-, I70.73-, I70.74-, I70.75Inherited from I70, I70.76
- chronic limb-threatening ischemia of other type of bypass graft(s) of the extremities with gangreneInherited from I70, I70.76
- critical limb ischemia of other type of bypass graft(s) of the extremities with gangreneInherited from I70, I70.76
Excludes 1
OfficialNo Excludes 1 notes are included in this display for I70.762. Check the code and parent instructions in the Code Book.
Code First
OfficialNo Code First sequencing instructions are included in this display for I70.762. Check the code and parent instructions in the Code Book.
Use Additional
Official- code to identify:Inherited from I70, I70.7, I70.76
- exposure to environmental tobacco smoke (Z77.22)Inherited from I70, I70.7, I70.76
- history of tobacco dependence (Z87.891)Inherited from I70, I70.7, I70.76
- occupational exposure to environmental tobacco smoke (Z57.31)Inherited from I70, I70.7, I70.76
- tobacco dependence (F17.-)Inherited from I70, I70.7, I70.76
- tobacco use (Z72.0)Inherited from I70, I70.7, I70.76
- code, if applicable, to identify chronic total occlusion of artery of extremity (I70.92)Inherited from I70, I70.7, I70.76
- code to identify the severity of any ulcer (L97.-, L98.49-), if applicableInherited from I70, I70.7, I70.76
Code Also
OfficialNo Code Also instructions are included in this display for I70.762. Check the code and parent instructions in the Code Book.
Buddy Documentation Tip
MEAT Support
Audit Caution
Common Mistakes
Current with CMS: FY2026 ICD-10-CM Apr 1 update (effective Apr 1 – Sep 30, 2026) · CMS-HCC V28, 100% phased in for payment year 2026. FY2027 code set already staged for October 1, 2026. How HCC Buddy stays current →
Is I70.762 an HCC code?
Yes. I70.762 (Atherosclerosis of other type of bypass graft(s) of the extremities with gangrene, left leg) maps to HCC 263, Atherosclerosis of Arteries of the Extremities with Ulceration or Gangrene under the CMS-HCC V28 risk adjustment model, with a source-labeled community non-dual aged reference coefficient of 1.118. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes. It is billable for payment year 2026.
Coder answer: I70.762 is billable and maps to V28 HCC 263, Atherosclerosis of Arteries of the Extremities with Ulceration or Gangrene. Open it in the Code Book for the tabular path, RAF, and MEAT checklist.
- Code
- I70.762
- Description
- Atherosclerosis of other type of bypass graft(s) of the extremities with gangrene, left leg
- HCC (V28)
- HCC 263 — Atherosclerosis of Arteries of the Extremities with Ulceration or Gangrene
- RAF reference coefficient
- 1.118
- Billable
- Yes
- Payment year
- 2026
HCC Category Mapping
These are source-labeled model coefficients, not member totals. A category may still be removed by hierarchy or model cleanup rules. Weights are not directly comparable across models: CMS-HCC V28 and V24 use Community, Non-Dual, Aged; ESRD uses the dialysis continuing-enrollee model; RxHCC is the Part D continuing-enrollee, non-low-income, aged weight (a larger scale than CMS-HCC). ACA/HHS has no single weight — it varies by metal level. Actual per-patient RAF contribution depends on member context, hierarchy and cleanup rules, interactions, and the model year used by the payer. V28 is the CMS-HCC model phased in over payment years 2024–2026; V24 remains available for historical review.
Work I70.762 in the Code Book — tabular path, V28 RAF reference, and MEAT checklist →
MEAT review for I70.762
For I70.762, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule.
- MMonitor: signs, symptoms, disease progression, or lab trending documented in the note
- EEvaluate: test results, medication response, or physical findings reviewed by the provider
- AAssess: explicit mention in the assessment or plan with acknowledgment of status
- TTreat: medication, referral, procedure, therapy, or counseling tied to the diagnosis
Coder workflow notes
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What This Code Means
I70.762 is the ICD-10-CM diagnosis code for atherosclerosis of other type of bypass graft(s) of the extremities with gangrene, left leg. Hardening and narrowing of a surgical bypass graft in the left leg that has progressed to tissue death (gangrene) due to poor blood flow. I70.762 sits in the ICD-10-CM chapter for diseases of the circulatory system (i00-i99), within the section covering diseases of arteries, arterioles and capillaries (i70-i79).
Under the CMS-HCC V28 risk adjustment model, I70.762 maps to Atherosclerosis of Arteries of the Extremities with Ulceration or Gangrene (HCC 263) with a source-labeled community, non-dual, aged reference coefficient of 1.118. No V24 mapping is shown for I70.762; use the applicable model and payment year when reviewing the V28 mapping. For CY2026 non-PACE Medicare Advantage, CMS uses 100% of the 2024 CMS-HCC model (V28). PACE uses a separate model blend. Source-labeled code-level coefficients are references, not member totals. Actual contribution depends on complete member context, hierarchy and cleanup rules, interactions, and model year. HCC Buddy's RAF Calculator supports CMS-HCC V28 PY2026 and shows no score unless every required source and calculation check passes.
Verify documentation specifies the left leg and confirms gangrene is present; gangrene indicates severe disease requiring urgent intervention. For I70.762, confirm that the documentation supports the diagnosis and meets the applicable coding, encounter, program and payer requirements. MEAT (Monitor, Evaluate, Assess, or Treat) is a review mnemonic, not a universal CMS coding rule. When documentation is ambiguous, coders should issue a provider query rather than assume the highest-specificity variant.
HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for I70.762 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.
Coding Tips
- •Verify documentation specifies the left leg and confirms gangrene is present; gangrene indicates severe disease requiring urgent intervention
- •Ensure the bypass graft type is documented as 'other type' rather than autologous vein or nonautologous biological material
Clinical Significance
Atherosclerosis of other type bypass graft with gangrene of the left leg represents the most severe stage of peripheral arterial disease (Fontaine Stage IV with tissue necrosis). Gangrene indicates irreversible tissue death from critical ischemia, carrying high risk for major amputation, sepsis, and mortality. This is a high-acuity condition requiring urgent vascular intervention, aggressive wound management, and often surgical amputation, making it one of the most impactful vascular HCC codes for risk adjustment.
Documentation Requirements
- ✓Gangrene explicitly documented in the left leg — wet or dry gangrene specified when possible
- ✓Atherosclerotic disease of other type bypass graft(s) confirmed as the underlying cause
- ✓Laterality documented: left leg
- ✓Type of bypass graft specified (synthetic, composite, or other non-vein/non-biological type)
- ✓Extent of gangrenous tissue described (digits, forefoot, limb segment)
- ✓Additional code(s) to identify severity of any associated ulceration (L97.-, L98.49-) when ulcers coexist
- ✓Treatment plan documented (amputation level, revascularization attempts, wound care, antibiotic therapy)
- ✓Vascular studies or surgical findings supporting the diagnosis
Commonly Confused Codes
- •I70.661/I70.662/I70.669: Atherosclerosis of nonautologous biological bypass graft with gangrene (different graft type)
- •I70.561/I70.562/I70.569: Atherosclerosis of autologous vein bypass graft with gangrene (different graft type: autologous vein)
- •I70.261/I70.262/I70.269: Atherosclerosis of native arteries with gangrene (native artery, not bypass graft)
- •I70.361/I70.362/I70.369: Atherosclerosis of unspecified type bypass graft with gangrene (less specific graft type)
- •I96: Gangrene, not elsewhere classified (use when gangrene is not due to atherosclerosis of bypass graft)