2027 ICD-10-CM Diagnosis Code I70.90Unspecified atherosclerosis
ICD-10-CM Codes›I00–I99›I70-I79›I70
- Billable — Valid for Submission
- Chronic Condition
I70.90 is a billable ICD-10-CM diagnosis code for unspecified atherosclerosis. 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. The code is restricted by the Medicare Code Editor to adult patients (age 15 through 124). In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Peripheral and visceral vascular disease.
Code Identity
Code Classification
Code EditsBilling
Medicare Code Editor checks that affect claim validity for I70.90.
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Abnormal diffuse intimal thickening of artery
- Acute occlusion of artery
- Arteriosclerosis obliterans
- Arteriosclerotic vascular disease
- Arteriovascular degeneration
- Asymptomatic chronic arterial occlusive disease
- Asymptomatic occlusion of artery
- Atheroma of artery
- Atherosclerosis of artery
- Atherosclerosis, deafness, diabetes, epilepsy, nephropathy syndrome
- Atherosclerotic occlusive disease
- Atherosclerotic plaque disruption with thrombosis of artery
- Calciphylaxis
- Condition of arterial wall - finding
- Endarteritis
- Endarteritis deformans
- Endarteritis obliterans
- Hardened arteries
- Ischemic ulcer of lower leg due to atherosclerotic disease
- Multifocal atherosclerosis
- Non-uremic calcific arteriolopathy
- Occlusion of artery
- Senile arteriosclerosis
- Senile arteritis
- Senile endarteritis
- Subclinical atherosclerosis of artery
- Subclinical disease AND/OR syndrome
- Vascular degeneration
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to I70.90: its own notes plus those printed at I70.9, I70, and Chapter 9. A note printed at a category, block or chapter applies to every code under it.
Includes
Further defines, or gives examples of, the content of the category.
- arteriolosclerosis
- arterial degeneration
- arteriosclerosis
- arteriosclerotic vascular disease
- arteriovascular degeneration
- atheroma
- endarteritis deformans or obliterans
- senile arteritis
- senile endarteritis
- vascular degeneration
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.
- disorders of pyrophosphate metabolism (E83.82-)
- 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.-)
Use Additional Code
Add a second code, after this one, to fully describe the condition.
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name I70.90, its category, or a range that includes it.
Excludes1 3
These codes carry an Excludes1 note naming I70.90: they are not reported together with it, unless the two conditions are unrelated.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
Atheroma, atheromatous See Also: Arteriosclerosis; I70.90
capillary See Also: Arteriosclerosis; I70.90
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Arteriosclerosis
thickening and loss of elasticity of the walls of arteries of all sizes. there are many forms classified by the types of lesions and arteries involved, such as atherosclerosis with fatty lesions in the arterial intima of medium and large muscular arteries.
Patient EducationClinical
Atherosclerosis
Atherosclerosis is a condition in which plaque builds up inside your arteries. Plaque is a sticky substance made up of cholesterol, fat, blood cells, calcium, and other substances found in the blood. Over time, plaque hardens and causes your arteries to narrow. That limits the flow of oxygen-rich blood to your body.
The full article covers:
- What is atherosclerosis?
- What causes atherosclerosis?
- Who is more likely to develop atherosclerosis?
- What are the symptoms of atherosclerosis?
- What other problems can atherosclerosis cause?
- How is atherosclerosis diagnosed?
- What are the treatments for atherosclerosis?
- Can atherosclerosis be prevented?
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Convert I70.90 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About I70.90Overview
What is the ICD-10 code for unspecified atherosclerosis?
The ICD-10-CM code for unspecified atherosclerosis is I70.90 (sometimes written as I7090). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
Is I70.90 (Other and unspecified atherosclerosis) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report unspecified atherosclerosis on HIPAA-covered claims from October 1, 2026 through September 30, 2027.
What MS-DRG does I70.90 group to?
When unspecified atherosclerosis 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.
Who can I70.90 be reported for?
The Medicare Code Editor checks unspecified atherosclerosis against patient demographics: this code is intended for adult patients (age 15 through 124). Claims outside these limits are flagged as inconsistent.
Does I70.90 need an additional code?
When the condition applies, yes. The Use Additional Code note at I70, which applies to I70.90, reads: 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). The additional code is reported after I70.90.
