ICD-10-CM Code I77.6

Arteritis, unspecified

Version 2020 Billable Code

Valid for Submission

I77.6 is a billable code used to specify a medical diagnosis of arteritis, unspecified. The code is valid for the year 2020 for the submission of HIPAA-covered transactions. The ICD-10-CM code I77.6 might also be used to specify conditions or terms like antineutrophil cytoplasmic antibody positive vasculitis, aortitis, arteriolitis, arteritis, chronic peri-aortitis, disorder of arteriole, etc

Short Description:Arteritis, unspecified
Long Description:Arteritis, unspecified

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code I77.6:

Inclusion Terms

Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • Aortitis NOS
  • Endarteritis NOS

Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.

Index to Diseases and Injuries

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code I77.6 are found in the index:


The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

  • Antineutrophil cytoplasmic antibody positive vasculitis
  • Aortitis
  • Arteriolitis
  • Arteritis
  • Chronic peri-aortitis
  • Disorder of arteriole
  • Drug-induced necrotizing vasculitis
  • Endarteritis
  • Glomerulonephritis co-occurrent and due to antineutrophil cytoplasmic antibody positive vasculitis
  • Hughes Stovin syndrome
  • Idiopathic aortitis
  • Immune complex small vessel vasculitis caused by drug
  • Immune complex urticaria
  • Infectious endarteritis of arterial duct
  • Infective aortitis
  • Infective endarteritis at site of aortic coarctation
  • Infective endarteritis at site of aortopulmonary window
  • Juvenile temporal arteritis
  • Lumbosacral plexopathy due to vasculitis
  • Lupus vasculitis
  • Paraneoplastic vasculitis
  • Periarteritis
  • Polyarteritis
  • Post-infectious vasculitis
  • Primary systemic arteritis
  • Primary systemic vasculitis
  • Pulmonary hypertension due to vasculitis
  • Pulmonary hypertension in systemic disorder
  • Renal vasculitis
  • Secondary aortitis
  • Secondary systemic vasculitis
  • Serum sickness type vasculitis
  • Single organ vasculitis
  • Small vessel vasculitis
  • Small vessel vasculitis caused by immune complex
  • Systemic vasculitis
  • Thromboarteritis
  • Vascular disorder of large intestine
  • Vasculitis
  • Vasculitis due to adenosine deaminase 2 deficiency
  • Vasculitis of large artery
  • Vasculitis of large intestine
  • Vasculitis of medium sized vessel
  • Vasculitis of mesenteric artery
  • Vasculitis secondary to drug
  • Vasculitis with glomerulonephritis

Clinical Information

  • ARTERITIS-. inflammation of any arteries.
  • POLYARTERITIS NODOSA-. a form of necrotizing non granulomatous inflammation occurring primarily in medium sized arteries often with microaneurysms. it is characterized by muscle joint and abdominal pain resulting from arterial infarction and scarring in affected organs. polyarteritis nodosa with lung involvement is called churg strauss syndrome.
  • TAKAYASU ARTERITIS-. a chronic inflammatory process that affects the aorta and its primary branches such as the brachiocephalic artery brachiocephalic trunk and carotid arteries. it results in progressive arterial stenosis occlusion and aneurysm formation. the pulse in the arm is hard to detect. patients with aortitis syndrome often exhibit retinopathy.
  • GIANT CELL ARTERITIS-. a systemic autoimmune disorder that typically affects medium and large arteries usually leading to occlusive granulomatous vasculitis with transmural infiltrate containing multinucleated giant cells. the temporal artery is commonly involved. this disorder appears primarily in people over the age of 50. symptoms include fever; fatigue; headache; visual impairment; pain in the jaw and tongue; and aggravation of pain by cold temperatures. from adams et al. principles of neurology 6th ed
  • VASCULITIS CENTRAL NERVOUS SYSTEM-. inflammation of blood vessels within the central nervous system. primary vasculitis is usually caused by autoimmune or idiopathic factors while secondary vasculitis is caused by existing disease process. clinical manifestations are highly variable but include headache; seizures; behavioral alterations; intracranial hemorrhages; transient ischemic attack; and brain infarction. from adams et al. principles of neurology 6th ed pp856 61

Diagnostic Related Groups

The ICD-10 code I77.6 is grouped in the following groups for version MS-DRG V37.0 What are Diagnostic Related Groups?
The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC).
applicable from 10/01/2019 through 09/30/2020.


Convert I77.6 to ICD-9

Code Classification

  • Diseases of the circulatory system (I00–I99)
    • Diseases of arteries, arterioles and capillaries (I70-I79)
      • Other disorders of arteries and arterioles (I77)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Information for Patients


Vasculitis is an inflammation of the blood vessels. It happens when the body's immune system attacks the blood vessel by mistake. It can happen because of an infection, a medicine, or another disease. The cause is often unknown.

Vasculitis can affect arteries, veins and capillaries. Arteries are vessels that carry blood from the heart to the body's organs. Veins are the vessels that carry blood back to the heart. Capillaries are tiny blood vessels that connect the small arteries and veins.

When a blood vessel becomes inflamed, it can

  • Narrow, making it more difficult for blood to get through
  • Close off completely so that blood can't get through
  • Stretch and weaken so much that it bulges. The bulge is called an aneurysm. If it bursts, it can cause dangerous bleeding inside the body.

Symptoms of vasculitis can vary, but usually include fever, swelling and a general sense of feeling ill. The main goal of treatment is to stop the inflammation. Steroids and other medicines to stop inflammation are often helpful.

NIH: National Heart, Lung, and Blood Institute

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