I70.1 is not a CMS-HCC payment code. MEAT criteria · RAF Calculator · HCC coding software

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Code lookupI70.1

Effective periodFY2026 Apr Update (Apr 1-Sep 30)

FY 2026 Apr update / Diseases of the circulatory system (I00-I99) / Diseases of arteries, arterioles and capillaries (I70-I79)

I70.1

Billable / SpecificICD-10-CMOfficial ICD-10-CMCodebook guidance

Atherosclerosis of renal artery

Narrowing of the blood vessels that supply the kidneys due to fatty plaque buildup, which can affect kidney function and blood pressure.

Buddy Insight

Atherosclerosis of the renal artery can cause renovascular hypertension and ischemic nephropathy, potentially leading to progressive chronic kidney disease and refractory hypertension.

Overview Risk Models Code Book Documentation Audit Notes Edition comparison

CMS-HCC V28

N/A

—

Not risk-adjusted for this model/period.

Not mapped

CMS-HCC V24

Historical

Not used for standard CY2026 Medicare Advantage payment. Select a historical period to review V24.

Not used for CY2026 payment

ACA/HHS

N/A

—

Not risk-adjusted for this model/period.

Not mapped

ESRD/PACE

Context needed

HCC 108

ESRD candidates: HCC 108 when age >= 15. ESRD mapping is separate from PACE. Dialysis, graft, age, and other member context determine the applicable coefficient.

Coefficient needs member context

RXHCC

N/A

—

Not risk-adjusted for this model/period.

Not mapped

Code Book Path

Official

I70Atherosclerosis I70.1Atherosclerosis of renal artery

Inclusion Terms

Official

Goldblatt's kidney

Excludes 2

Official

atherosclerosis of renal arterioles (I12.-)
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

Official

I70.0Atherosclerosis of aorta I70.2Atherosclerosis of native arteries of the extremities I70.3Atherosclerosis of unspecified type of bypass graft(s) of the extremities I70.4Atherosclerosis of autologous vein bypass graft(s) of the extremities I70.5Atherosclerosis of nonautologous biological bypass graft(s) of the extremities

Includes

Official

arteriolosclerosisInherited from I70
arterial degenerationInherited from I70
arteriosclerosisInherited from I70
arteriosclerotic vascular diseaseInherited from I70
arteriovascular degenerationInherited from I70
atheromaInherited from I70
endarteritis deformans or obliteransInherited from I70
senile arteritisInherited from I70
senile endarteritisInherited from I70
vascular degenerationInherited from I70

Excludes 1

Official

No Excludes 1 notes are included in this display for I70.1. Check the code and parent instructions in the Code Book.

Code First

Official

No Code First sequencing instructions are included in this display for I70.1. Check the code and parent instructions in the Code Book.

Use Additional

Official

code to identify:Inherited from I70
exposure to environmental tobacco smoke (Z77.22)Inherited from I70
history of tobacco dependence (Z87.891)Inherited from I70
occupational exposure to environmental tobacco smoke (Z57.31)Inherited from I70
tobacco dependence (F17.-)Inherited from I70
tobacco use (Z72.0)Inherited from I70

Code Also

Official

No Code Also instructions are included in this display for I70.1. Check the code and parent instructions in the Code Book.

Buddy Documentation Tip

HCC Buddy guidance

Documentation of the specific arterial site affected by atherosclerosis

Imaging or hemodynamic evidence of renal artery stenosis (duplex ultrasonography, computed tomography angiography, or arteriography)

Assessment of impact on renal function (serum creatinine, glomerular filtration rate) and blood pressure control

Documentation of whether renovascular hypertension or ischemic nephropathy is present

MEAT Support

HCC Buddy guidance

Documentation of the specific arterial site affected by atherosclerosis

Imaging or hemodynamic evidence of renal artery stenosis (duplex ultrasonography, computed tomography angiography, or arteriography)

Assessment of impact on renal function (serum creatinine, glomerular filtration rate) and blood pressure control

Documentation of whether renovascular hypertension or ischemic nephropathy is present

Audit Caution

HCC Buddy guidance

Not coding the associated renovascular hypertension (I15.0) when documented — renal artery atherosclerosis and its hypertensive consequence are coded separately

Confusing atherosclerosis of the renal artery with chronic kidney disease — while renal artery atherosclerosis can cause chronic kidney disease, the two are distinct diagnoses that should be coded separately

Failing to differentiate between atherosclerotic renal artery stenosis and fibromuscular dysplasia of the renal artery, which has a different etiology and code

Not reassessing and documenting atherosclerotic disease at each encounter — peripheral arterial disease and other atherosclerotic conditions must be actively managed and documented annually for risk adjustment recapture

Common Mistakes

HCC Buddy guidance

I70.0 — Atherosclerosis of aorta; use when atherosclerosis affects the aorta rather than the renal arteries

I15.0 — Renovascular hypertension; this is the hypertension caused by renal artery disease and may be coded in addition to I70.1

N28.0 — Ischemia and infarction of kidney; use for acute renal ischemia, which may be a consequence of renal artery atherosclerosis

I70.2x — Atherosclerosis of native arteries of extremities; use when the peripheral arterial disease involves limb arteries

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 I70.1 an HCC code?

Code: I70.1
Description: Atherosclerosis of renal artery
HCC (V28): No CMS-HCC V28 mapping
RAF reference coefficient: —
Billable: Yes
Payment year: 2026

Coder workflow notes

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What This Code Means

I70.1 is the ICD-10-CM diagnosis code for atherosclerosis of renal artery. Narrowing of the blood vessels that supply the kidneys due to fatty plaque buildup, which can affect kidney function and blood pressure. I70.1 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).

I70.1 has no mapping under the current CMS-HCC V28 community payment model. I70.1 has a separate mapping under the CMS-HCC ESRD model (HCC 108 (Vascular Disease)); the applicable result needs member context. Do not assign V28 risk adjustment value from this page; verify the applicable model and payment year before using this code for risk adjustment.

Specify laterality (right, left, or bilateral) in documentation to support accurate coding.

HCC Buddy maintains structured V28 and V24 mapping, source-labeled coefficient references, and MEAT documentation criteria for I70.1 sourced directly from the CMS-HCC risk adjustment model files and the CMS ICD-10-CM code set.

Coding Tips

•Specify laterality (right, left, or bilateral) in documentation to support accurate coding
•Document any associated hypertension or chronic kidney disease, as these conditions often coexist

Clinical Significance

Atherosclerosis of the renal artery can cause renovascular hypertension and ischemic nephropathy, potentially leading to progressive chronic kidney disease and refractory hypertension. This condition represents a significant intersection of vascular and renal pathology, often requiring specialized diagnostic workup including renal duplex ultrasonography and potentially angioplasty or stenting. Accurate documentation is important because it identifies patients at high risk for both cardiovascular events and progressive renal deterioration.

Documentation Requirements

✓Documentation of the specific arterial site affected by atherosclerosis
✓Imaging or hemodynamic evidence of renal artery stenosis (duplex ultrasonography, computed tomography angiography, or arteriography)
✓Assessment of impact on renal function (serum creatinine, glomerular filtration rate) and blood pressure control
✓Documentation of whether renovascular hypertension or ischemic nephropathy is present
✓Treatment plan (medical management, angioplasty, or stenting) with ongoing monitoring

Excludes 2, Not included here, may code separately

atherosclerosis of renal arterioles (I12.-)

Commonly Confused Codes

•I70.0: Atherosclerosis of aorta; use when atherosclerosis affects the aorta rather than the renal arteries
•I15.0: Renovascular hypertension; this is the hypertension caused by renal artery disease and may be coded in addition to I70.1
•N28.0: Ischemia and infarction of kidney; use for acute renal ischemia, which may be a consequence of renal artery atherosclerosis
•I70.2x: Atherosclerosis of native arteries of extremities; use when the peripheral arterial disease involves limb arteries