2027 ICD-10-CM Diagnosis Code I77.0Arteriovenous fistula, acquired

ICD-10-CM Codes›I00–I99›I70-I79›I77

ICD-10-CM I77.0
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

I77.0 is a billable ICD-10-CM diagnosis code for arteriovenous fistula, acquired. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 299 through 301. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Other specified and unspecified circulatory disease.

I77.0 no longer risk-adjusts for Medicare Advantage: it mapped to HCC 108 under the retired CMS-HCC V24 model through payment year 2025 but maps to no category in the live V28 model. It still risk-adjusts in the PACE (CMS-HCC V22) category 108, ESRD (V21) category 108, and ESRD (V24) category 108 for payment year 2027.

Code Identity

ICD-10-CM Code
I77.0
Billable Status
Yes — Valid for Submission
Code Describes
Arteriovenous fistula, acquired
Short Description
Arteriovenous fistula, acquired
Same as the full description in the CMS dataset.
Parent Code
I77
Other disorders of arteries and arterioles

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI70-I79Diseases of arteries, arterioles and capillaries
CategoryI77Other disorders of arteries and arterioles
This CodeI77.0Arteriovenous fistula, acquired

Medicare Risk Adjustment (HCC)Billing

I77.0 no longer risk-adjusts for Medicare Advantage: it maps to no payment category in the live CMS-HCC V28 model, although it still risk-adjusts in the other CMS models shown below.

CMS-HCC V28 (Medicare Advantage Payment Model)
Not mapped
Dropped in V28 see all codes that no longer risk-adjust
Prior Model (CMS-HCC V24)
HCC 108
V24 retired last contributed to a Medicare Advantage risk score in payment year 2025
Other CMS Models
PACE (CMS-HCC V22): HCC 108 · ESRD (V21): HCC 108 · ESRD (V24): HCC 108
ESRD V21 weights: 0.065 dialysis, 0.086–0.271 functioning graft · ESRD V24 weights: 0.073 dialysis, 0.074–0.287 functioning graft
Part D (RxHCC)
Not mapped
I77.0 does not risk-adjust in the RxHCC prescription drug model

Source: CMS Payment Year 2027 risk adjustment mappings and model software. Weights are relative factors, not dollar amounts; a beneficiary's total RAF also includes demographics and interactions. Browse all CMS-HCC categories.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acquired arteriovenous fistula
  • Acquired arteriovenous fistula aneurysm
  • Acquired arteriovenous fistula of liver
  • Acquired arteriovenous malformation
  • Acquired arteriovenous malformation of the skin
  • Acquired caroticocavernous sinus fistula
  • Acquired left carotid cavernous fistula
  • Acquired renal arteriovenous aneurysm
  • Acquired renal arteriovenous fistula
  • Acquired right carotid cavernous fistula
  • Aortic fistula
  • Aortocaval fistula
  • Arteriovenous fistula
  • Arteriovenous fistula aneurysm
  • Arteriovenous fistula hemorrhage
  • Arteriovenous fistula infection
  • Arteriovenous fistula of carotid artery and internal jugular vein
  • Arteriovenous fistula of left upper extremity
  • Arteriovenous fistula of right upper extremity
  • Arteriovenous fistula of splanchnic circulation
  • Arteriovenous fistula stenosis
  • Arteriovenous graft aneurysm
  • Carotid cavernous fistula
  • Cirsoid aneurysm
  • Diffuse arteriovenous fistula
  • Dural arteriovenous fistula
  • Iatrogenic arteriovenous fistula
  • Immature arteriovenous fistula
  • Infection of hemodialysis arteriovenous fistula
  • Mesenteric arteriovenous fistula
  • Mesenteric-portal fistula
  • Peripheral arteriovenous fistula
  • Surgically constructed arteriovenous fistula
  • Surgically constructed arteriovenous graft
  • Surgically constructed brachiobasilic arteriovenous fistula
  • Surgically constructed brachiocephalic arteriovenous fistula
  • Surgically constructed popliteal to great saphenous arteriovenous fistula
  • Surgically constructed radiocephalic arteriovenous fistula
  • Surgically constructed radiocephalic arteriovenous fistula at anatomical snuff box
  • Surgically constructed ulnar to cephalic arteriovenous fistula
  • Transposed brachiobasilic arteriovenous fistula
  • Transposed popliteal to great saphenous arteriovenous fistula
  • Truncal arteriovenous fistula
  • Vascular graft aneurysm

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to I77.0: its own notes plus those printed at I77 and Chapter 9. A note printed at a category, block or chapter applies to every code under it.

Applicable To

Conditions this code is used for: synonyms of the title or, for "other specified" codes, the conditions assigned to it. The list is not exhaustive.

  • Aneurysmal varix
  • Arteriovenous aneurysm, acquired

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

  • arteriovenous aneurysm NOS (Q27.3-)
  • presence of arteriovenous shunt (fistula) for dialysis (Z99.2)
  • traumatic - see injury of blood vessel by body region

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

On I77.0 itself
From I77 Other disorders of arteries and arterioles applies to 23 codes
  • collagen (vascular) diseases (M30-M36)
  • hypersensitivity angiitis (M31.0)
  • pulmonary artery (I28.-)
From Chapter 9 (I00-I99) Diseases of the circulatory system applies to 1,433 codes
  • 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.-)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name I77.0, its category, or a range that includes it.

Excludes1 1

These codes carry an Excludes1 note naming I77.0: they are not reported together with it, unless the two conditions are unrelated.

  • Q27.3 Arteriovenous malformation (peripheral)
    acquired arteriovenous aneurysm (I77.0)

Excludes2 2

These codes carry an Excludes2 note naming I77.0: its condition is not part of those codes, and both may be reported when the patient has both.

  • I72 Other aneurysm
    acquired aneurysm (I77.0)
  • I72 Other aneurysm
    varicose aneurysm (I77.0)

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR CIR032
Other specified and unspecified circulatory disease
Default principal diagnosis: inpatient Yes · outpatient Yes

Clinical InformationClinical

  • Arteriovenous Fistula

    an abnormal direct communication between an artery and a vein without passing through the capillaries. an a-v fistula usually leads to the formation of a dilated sac-like connection, arteriovenous aneurysm. the locations and size of the shunts determine the degree of effects on the cardiovascular functions such as blood pressure and heart rate.

Patient EducationClinical

Arteriovenous Malformations

Arteriovenous malformations (AVMs) are defects in your vascular system. Your vascular system is your body's network of blood vessels. It includes your:

The full article covers:

  • What are arteriovenous malformations (AVMs)?
  • What causes arteriovenous malformations (AVMs)?
  • What are the symptoms of arteriovenous malformations (AVMs)?
  • How are arteriovenous malformations (AVMs) diagnosed?
  • What are the treatments for arteriovenous malformations (AVMs)?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert I77.0 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
447.0 Acq arterioven fistula
Exact Match The mapping is direct, with no qualifiers.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About I77.0Overview

What is the ICD-10 code for arteriovenous fistula, acquired?

The ICD-10-CM code for arteriovenous fistula, acquired is I77.0 (sometimes written as I770). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

Is I77.0 (Other disorders of arteries and arterioles) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report arteriovenous fistula, acquired on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does I77.0 group to?

When arteriovenous fistula, acquired is the principal diagnosis on an inpatient stay, it groups to MS-DRG 301, 300, 299, with relative weights from 0.7132 to 1.5840 depending on complications. Higher weights mean higher Medicare reimbursement.

Can I77.0 be reported with a code from Q27.3?

Not as a rule. The Excludes1 note on I77.0 lists "arteriovenous aneurysm NOS (Q27.3-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

What is the ICD-9 equivalent of I77.0?

Under the General Equivalence Mappings, arteriovenous fistula, acquired converts to ICD-9-CM 447.0 (acq arterioven fistula). The mapping is a direct match.

Does I77.0 risk-adjust for Medicare Advantage payment?

Not for Medicare Advantage. I77.0 mapped to HCC 108 in the retired CMS-HCC V24 model, which last determined payment in 2025, but it maps to no category in the live V28 model; see all codes that no longer risk-adjust. It still risk-adjusts in the PACE (CMS-HCC V22) category 108 (Vascular Disease), ESRD (V21) category 108 (Vascular Disease), and ESRD (V24) category 108 (Vascular Disease).