Correct disease coding is essential in cardiology billing, especially when it comes to Rheumatic Heart Disease. Although this disease is preventable, it still affects millions of people worldwide, making it a common occurrence in hospitals and clinics.
Choosing the correct code for this disease is often a major challenge for medical coders. This is because it involves problems with various heart valves, and it is essential to differentiate whether the disease is new (acute) or old (chronic).
Even a small error in coding can lead to the rejection of an insurance claim or a delay in payments. This guide provides a complete list of ICD-10-CM codes for rheumatic heart disease, along with essential tips to help you do your job with confidence and avoid mistakes.
What Is Rheumatic Heart Disease?
This is a heart disease that results from improper treatment of a past throat infection (Strep Throat). When a sore throat is not treated well, the body’s immune system mistakenly attacks parts of the heart while fighting the germs, which can permanently damage the heart valves.
The mitral valve of the heart is most affected in this condition. In addition, the aortic and tricuspid valves can also be damaged. Other heart diseases can also arise due to the narrowing or leakage of the valves.
If you are doing medical coding, you need to take special care of two things:
- Stage of the disease, whether it is new (Acute) or has it become old and chronic.
- What type of heart valve is damaged?
Based on these two things, you can choose the correct ICD-10-CM codes for rheumatic heart disease.
ICD-10 coding for RHD
Rheumatic fever heart disease (RHD) codes range from I00 to I99. Specifically, RHD codes fall into categories I00 to I09, which include both acute rheumatic fever and chronic rheumatic heart disease.
Within this range, the codes are divided in the following order:
- Acuity: This has separate codes for new or acute disease (I00–I02) and old or chronic disease (I05–I09).
- Valve affected: This has codes for mitral, aortic, tricuspid, or multiple valves.
- Dysfunction: This includes codes for valve stenosis, valve insufficiency, or a combination of both.
Always refer to the instructions in the relevant category, such as Includes (what is included), Excludes1, and Excludes2 (what is not included), before assigning any code. These instructions indicate whether the codes should be used alone, in combination, or not at all. Ignoring these instructions is one of the most common errors in ICD-10 coding for RHD.
List of ICD-10-CM Codes for Rheumatic Heart Disease
The following ICD-10 codes for rheumatic heart disease are organized by category. You can use this as a quick-reference guide during chart review and code assignment.
Acute Rheumatic Fever Codes (I00–I02)
These codes are used when rheumatic fever is active and acute. This simply means that an inflammatory or disease attack is present and has been formally confirmed by the doctor in his report.
| ICD-10 Code | Description |
| 100 | Rheumatic fever without heart involvement |
| 101.0 | Acute rheumatic pericarditis |
| 101.1 | Acute rheumatic endocarditis |
| 101.2 | Acute rheumatic myocarditis |
| 101.8 | Other acute rheumatic heart disease |
| 101.9 | Acute rheumatic heart disease, unspecified |
| 102.0 | Rheumatic chorea with heart involvement |
| 102.9 | Rheumatic chorea without heart involvement |
Chronic Rheumatic Mitral Valve Diseases (I05)
These codes range from 105 – 105.9 and apply to established, chronic mitral valve damage resulting from prior rheumatic fever. The mitral valve of the heart is more affected by rheumatic fever.
| ICD-10 Code | Description |
| 105.0 | Rheumatic mitral stenosis |
| 105.1 | Rheumatic mitral insufficiency |
| 105.2 | Rheumatic mitral stenosis with insufficiency |
| 105.8 | Other rheumatic mitral valve diseases |
| 105.9 | Rheumatic mitral valve diseases, unspecified |
Chronic Rheumatic Aortic Valve Diseases (I06)
The aortic valve is among the second most affected valves in rheumatic heart disease.
| ICD-10 Code | Description |
| 106.0 | Rheumatic aortic stenosis |
| 106.1 | Rheumatic aortic insufficiency |
| 106.2 | Rheumatic aortic stenosis with insufficiency |
| 106.8 | Other rheumatic aortic valve diseases |
| 106.9 | Rheumatic aortic valve disease, unspecified |
Chronic Rheumatic Tricuspid Valve Diseases (I07)
Tricuspid valve disease is far less common in RHD but frequently occurs alongside mitral valve involvement.
| ICD-10 Code | Description |
| 107.0 | Rheumatic tricuspid stenosis |
| 107.1 | Rheumatic tricuspid insufficiency |
| 107.2 | Rheumatic tricuspid stenosis and insufficiency |
| 107.8 | Other rheumatic tricuspid valve diseases |
| 107.9 | Rheumatic tricuspid valve disease, unspecified |
Multiple Valve Diseases (I08)
If a patient has two or more valves (for example, both mitral and aortic) that are defective, a common code (I08) is used for them. Correct use of I08 codes provides a complete picture of the patient’s medical condition.
Accurate coding helps in the correct determination of the DRG (Diagnosis-Related Group), which is very important for hospital reimbursement.
| ICD-10 Code | Description |
| 108.0 | Rheumatic disorders of both the mitral and aortic valves. |
| 108.1 | Rheumatic disorders of both the mitral and tricuspid valves. |
| 108.2 | Rheumatic disorders of both the aortic and tricuspid valves. |
| 108.3 | Combined rheumatic disorders of the mitral, aortic, and tricuspid valves. |
| 108.8 | Other rheumatic multiple valve diseases. |
| 108.9 | Rheumatic multiple valve disease, unspecified. |
Other Rheumatic Heart Diseases (I09)
Category I09 is used for rheumatic conditions that affect parts of the heart other than the valves, such as inflammation of the heart muscle (myocardial), the inner membrane (endocardial) or the outer membrane (pericardial), and rheumatic heart failure.
| ICD-10 Code | Description |
| I09.0 | Rheumatic myocarditis |
| I09.1 | Rheumatic diseases of the endocardium, valve unspecified |
| I09.2 | Chronic rheumatic pericarditis |
| I09.81 | Rheumatic heart failure |
| I09.89 | Other specified rheumatic heart diseases |
| I09.9 | Rheumatic heart disease, unspecified |
RHD Coding Guidelines
Just knowing the codes is not enough; the real skill is using them correctly. Writing ICD-10 coding for Rheumatic Heart Disease (RHD) in the correct order and detail is the difference that makes your work accurate and prevents costly financial errors (Claim errors).
The guidelines below clarify the complex situations where coders often make mistakes:
Apply the Rheumatic Rule Correctly for the Mitral Valve
According to the official rules of ICD-10-CM, if a patient has mitral valve disease, it is automatically assumed that the cause is rheumatic. This automatic assumption is limited to the mitral valve. This rule does not apply to the aortic, tricuspid, or pulmonary valves. The ICD codes (I06, I07, I08) for these valves can only be used if the doctor has clearly stated in the medical record that the cause of the disease is rheumatic.
Misusing this rule (i.e., assuming rheumatic for other valves) or ignoring it for the mitral valve is one of the biggest cardiology coding mistakes that auditors catch the most.
When RHD is the Principal Diagnosis, Keep Codes in Order
When a patient is admitted to the hospital specifically for a problem related to rheumatic heart disease (RHD), such as worsening mitral stenosis or rheumatic heart failure, code the specific valve disease or RHD first, followed by the codes for other related problems.
For example, always code the primary condition that brought the patient to the hospital (e.g., I05.0 for mitral stenosis). Code any other complications that may have arisen from the condition (e.g., if the patient also has atrial fibrillation).
Use a Separate Code for Atrial Fibrillation
Atrial fibrillation is one of the most common complications of rheumatic heart disease of the mitral valve, but it is often overlooked or forgotten by coders. Atrial fibrillation (AFib) is not included in the valve codes for rheumatic heart disease (RHD). If a patient has AFib along with valve disease, you must independently code it.
When both conditions are listed in the doctor’s report, both must be included on the claim. Each has its own clinical significance and can affect insurance reimbursement.
Never Mix Up Acute and Chronic RHD codes
It is very important in cardiology coding to distinguish between acute and chronic rheumatic heart disease, as they are completely different clinically and administratively.
Acute codes are used only when the patient has just had an attack of rheumatic fever, and the heart is currently inflamed. Chronic codes are used when the initial attack of the disease has ended, and the heart valves are now permanently damaged or injured.
It is a big mistake to assign an acute code to a patient with longstanding valve disease. Doing so can make your claim more difficult for insurance companies (payers), which is a major risk in terms of compliance.
Frequently Asked Questions (FAQs)
Q1: What is the diagnosis of rheumatic heart disease?
Ans. To diagnose RHD, doctors rely on the patient’s medical history, physical examination, and tests. During the diagnosis, it is seen whether the valves have become thick (thickening), narrowed (stenosis), or are leaking blood (regurgitation).
Q2: What are the first signs of rheumatic heart disease?
Ans. The symptoms of RHD often appear many years after an attack of rheumatic fever, which may include shortness of breath, fatigue, palpitations, and a heart murmur.
Q3: What are the severe effects of rheumatic heart disease?
Ans. If the disease progresses, it can be fatal with valve failure, heart irregularities, stroke, heart failure, and infection.
Conclusion
Correct ICD-10 coding of rheumatic heart disease (RHD) is not only about memorizing a list of codes, but also requires a deep understanding of the underlying nature of the disease, the distinction between acute versus chronic, and the documented conditions associated with specific valves.
Use this guide to rheumatic heart disease ICD-10 codes as your professional reference so that your coding on every chart is accurate, reasoned, and standardized.