Is ICD-10-CM code I06 billable?

No, I06 (Rheumatic aortic valve diseases) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code I06 belong to?

I06 belongs to Chapter 9 of the ICD-10-CM tabular list: I00–I99 (Diseases of the Circulatory System).

I06Not billable, use a more specific code below

Rheumatic aortic valve diseases

In Chronic rheumatic heart diseases (I05-I09), chapter 9: Diseases of the Circulatory System

5 billable codes under I06: none are a CC or MCC; none map to an HCC.

Instructional notes

Excludes2: not included here, code separately if applicable

aortic valve disease not specified as rheumatic (I35.-)
aortic valve disease with mitral and/or tricuspid valve involvement (I08.-)

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Covers hypertension with heart and kidney disease, coronary artery disease with angina, perioperative stroke, cerebrovascular sequelae, and acute myocardial infarction types and timing.

Hypertension (page 50)
Atherosclerotic Coronary Artery Disease and Angina (page 52)
Intraoperative and Postprocedural Cerebrovascular Accident (page 53)
Sequelae of Cerebrovascular Disease (page 53)
Acute myocardial infarction (AMI) (page 54)

Read Section I.C.9 (page 50)

All codes under I06

I06 can't be used on a claim. Pick a billable code below; grey headings group them.

I06 MS-DRGs

As the principal diagnosis, all 5 billable codes under I06 group to MS-DRG 306 or 307 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

Other codes that refer to I06

Notes on these codes point to I06.

I27.22 Code Also: rheumatic aortic valve diseases (I06.-)
I35 Excludes2: aortic valve disorder specified as rheumatic (I06.-)

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

Heart Valve Diseases

Heart valve disease happens when one or more of your heart valves don't work well. Your heart has four valves: the tricuspid, pulmonary, mitral, and aortic valves. The valves have flaps that open and close. The flaps make sure that blood flows in the right direction through your heart and to the rest of your body. When your heart beats, the flaps open to let blood through. Between heartbeats they close to stop the blood from flowing backwards.

Streptococcal Infections

Strep is short for Streptococcus, a type of bacteria that often lives in your nose and throat. Most strep infections are mild, but some may become serious depending on your overall health.

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.