2024 ICD-10-CM Diagnosis Code Q24.5

Approximate Synonyms

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

• Aberrant course of left anterior descending coronary artery from right coronary artery crossing right ventricular outflow tract
• Abnormal coronary artery course
• Abnormal ostium of coronary artery
• Abnormal ostium of coronary sinus
• Abnormality of right superior vena cava
• Aneurysm of coronary vessels
• Anomalous communication of coronary artery
• Anomalous coronary artery with acute angulation of less than 45 degrees relative to aorta
• Anomalous coronary artery without acute angulation of less than 45 degrees relative to aorta
• Anomalous coronary venous return
• Anomalous course of coronary artery across right ventricular outflow tract
• Anomalous course of coronary artery anterior to aorta
• Anomalous course of coronary artery anterior to pulmonary trunk
• Anomalous course of coronary artery anterior to pulmonary trunk and aorta
• Anomalous course of coronary artery posterior to aorta
• Anomalous course of coronary artery posterior to pulmonary trunk
• Anomalous course of coronary artery posterior to pulmonary trunk and aorta
• Anomalous course of coronary artery through infundibular septum
• Anomalous intramural course of proximal portion of coronary artery above aortic sinus
• Anomalous intramural course of proximal portion of coronary artery across commissure of aortic valve
• Anomalous intramural course of proximal portion of coronary artery within aortic sinus
• Anomalous origin of accessory coronary artery from aortic sinus
• Anomalous origin of accessory coronary artery from pulmonary artery
• Anomalous origin of circumflex artery from aortic sinus to right of nonfacing aortic sinus and anomalous origin of left anterior descending coronary artery and right coronary artery from aortic sinus to left of nonfacing aortic sinus
• Anomalous origin of conus artery from separate aortic sinus orifice
• Anomalous origin of coronary arteries from anterior aortic sinus
• Anomalous origin of coronary arteries from both aortic sinuses of bicuspid valve
• Anomalous origin of coronary artery
• Anomalous origin of coronary artery from aorta
• Anomalous origin of coronary artery from aortic sinus to left of nonfacing aortic sinus
• Anomalous origin of coronary artery from aortic sinus to right of nonfacing aortic sinus
• Anomalous origin of coronary artery from left pulmonary artery
• Anomalous origin of coronary artery from non-facing sinus
• Anomalous origin of coronary artery from pulmonary arterial tree
• Anomalous origin of coronary artery from right pulmonary artery
• Anomalous origin of dual left anterior descending coronary arteries
• Anomalous origin of dual left anterior descending coronary arteries from right coronary artery and left coronary artery
• Anomalous origin of large conus artery from right coronary artery
• Anomalous origin of left anterior descending artery and right coronary artery from aortic sinus to right of nonfacing aortic sinus and anomalous origin of circumflex artery from aortic sinus to left of nonfacing aortic sinus
• Anomalous origin of left anterior descending artery from aortic sinus to right of nonfacing aortic sinus and anomalous origin of circumflex artery and right coronary artery from aortic sinus to left of nonfacing aortic sinus
• Anomalous origin of left anterior descending coronary artery from pulmonary artery
• Anomalous origin of left anterior descending coronary artery from right coronary artery aortic sinus
• Anomalous origin of left anterior descending from right coronary artery
• Anomalous origin of left circumflex artery from right coronary artery
• Anomalous origin of left circumflex coronary artery from pulmonary artery
• Anomalous origin of left circumflex coronary artery from right coronary aortic sinus
• Anomalous origin of left coronary artery
• Anomalous origin of left coronary artery and right coronary artery from pulmonary artery
• Anomalous origin of left coronary artery and right coronary artery with dual orifices from aortic sinus to left of nonfacing aortic sinus
• Anomalous origin of left coronary artery and right coronary artery with dual orifices from aortic sinus to right of nonfacing aortic sinus
• Anomalous origin of left coronary artery from pulmonary artery
• Anomalous origin of left coronary artery from right coronary aortic sinus
• Anomalous origin of left coronary artery from right coronary artery
• Anomalous origin of right coronary artery
• Anomalous origin of right coronary artery and circumflex artery from aortic sinus to right of nonfacing aortic sinus and anomalous origin of left anterior descending artery from aortic sinus to left on nonfacing aortic sinus
• Anomalous origin of right coronary artery from aortic sinus to right of nonfacing aortic sinus and anomalous origin of left coronary artery from aortic sinus to left of nonfacing aortic sinus
• Anomalous origin of right coronary artery from left anterior descending coronary artery
• Anomalous origin of right coronary artery from left circumflex coronary artery
• Anomalous origin of right coronary artery from left coronary artery
• Anomalous origin of right coronary artery from left coronary artery aortic sinus
• Anomalous origin of right coronary artery from left coronary artery aortic sinus and anomalous origin of left coronary artery from right coronary artery aortic sinus
• Anomalous origin of right coronary artery from pulmonary artery
• Anomalous origin of single coronary artery from aortic sinus to left of nonfacing aortic sinus
• Anomalous origin of single coronary artery from aortic sinus to right of nonfacing aortic sinus
• Anomalous origin of single coronary artery from left coronary artery aortic sinus
• Anomalous origin of single coronary artery from nonfacing aortic sinus
• Anomalous origin of single coronary artery from right coronary artery aortic sinus
• Anomalous origin of sinus node coronary artery from separate aortic sinus orifice
• Anomalous valve of coronary sinus
• Aortic left ventricular tunnel
• Aortic left ventricular tunnel with right coronary artery from tunnel
• Aortic tunnel
• Aortopulmonary coronary arterial course
• Atresia of systemic vein
• Balanced coronary system
• Calcification of coronary artery
• Circumflex runs posterior to aorta
• Circumflex runs posterior to pulmonary trunk
• Common coronary artery orifice
• Completely unroofed coronary sinus defect in left atrium
• Congenital abnormal number of coronary ostia
• Congenital abnormality of great veins and coronary sinus
• Congenital abnormality of hepatic vein
• Congenital absence of coronary artery
• Congenital absence of coronary sinus
• Congenital anomaly of coronary artery
• Congenital atresia of cardiac vein
• Congenital atresia of coronary ostium
• Congenital atresia of left main stem coronary artery
• Congenital atresia of right coronary artery orifice
• Congenital coronary aneurysm
• Congenital coronary arteriovenous fistula
• Congenital coronary artery calcification
• Congenital coronary artery fistula
• Congenital coronary artery fistula to left atrium
• Congenital coronary artery fistula to left ventricle
• Congenital coronary artery fistula to pulmonary artery
• Congenital coronary artery fistula to right atrium
• Congenital coronary artery fistula to right ventricle
• Congenital coronary artery sclerosis
• Congenital coronary sinus stenosis
• Congenital occlusion of coronary sinus
• Congenital stenosis of coronary artery
• Congenital stenosis of coronary ostium
• Congenital stenosis of distal coronary artery
• Congenital stricture of artery
• Coronary artery arising from main pulmonary artery
• Coronary artery fistula to left atrium
• Coronary artery fistula to left ventricle
• Coronary artery fistula to right atrium
• Coronary artery fistula to right ventricle
• Coronary artery orifice abnormally low
• Coronary artery patency - finding
• Coronary artery patent
• Coronary artery runs between aorta and pulmonary trunk
• Coronary orifice abnormally high
• Coronary orifice asymmetrical
• Coronary ostium stenosis
• Coronary sinus defect in left atrium
• Coronary sinus drainage cephalad to left superior caval vein
• Coronary sinus drainage cephalad to right superior caval vein
• Coronary sinus orifice atresia
• Coronary sinus to left ventricle fistula
• Coronary stricture
• Diverticulum of coronary sinus
• Double barrel dual coronary artery orifices within aortic sinus
• Dual coronary orifice
• Fistula of coronary sinus
• Hepatic vein to coronary sinus
• Interruption of coronary artery
• Intramural coronary artery course
• Left dominant coronary system
• Malposition of coronary artery orifice
• Obstruction of coronary sinus
• Occlusion of coronary sinus
• Right dominant coronary system
• Right superior caval vein connecting to coronary sinus
• Single coronary artery
• Single coronary artery dividing into right coronary artery and left coronary artery
• Single left coronary artery supplying all of heart with usual distribution of right coronary artery derived from distal left coronary artery
• Single right coronary artery supplying all of heart with usual distribution of left coronary artery derived from distal right coronary artery
• Stricture of artery
• Systemic to coronary collateral artery
• Systemic to pulmonary collateral artery from coronary artery
• Truncal arteriovenous fistula
• Variant coronary origin from aortic sinus
• Variant dominance of coronary circulation
• Variant dominance of coronary circulation
• Variant dominance of coronary circulation
• Venous valvular anomaly
• Widely spaced right coronary artery and left coronary artery orifices within single aortic sinus

Q24.5 is grouped with Diagnostic Related Groups - MS-DRG Mapping

Diagnostic Related Groups (DRGs) are a classification system used to group together diagnosis codes for the purpose of reimbursement and healthcare management. DRGs are used to standardize the way hospitals and other providers are paid for inpatient services. In this system patients are grouped together based on their principal diagnosis in areas referred to as Major Diagnostic Categories (MDC). Once a patient is assigned a particular diagnostic category, providers receive a predetermined payment rate for the services rendered. This reimbursement rate is often fixed and is meant to cover the cost of care for that patient. Reimbursement is also affected by the relative weight of a diagnostic related group based on the severity of a patient's illness and the associated cost of care during hospitalization.

Diagnostic related groups encourage healthcare providers to focus on quality and efficiency in patient care while managing costs effectively. The diagnosis code is present in the following groups for version MS-DRG V41.0 applicable from 10/01/2023 through 09/30/2024.

MS-DRG	MS-DRG Title	MCD	Relative Weight
306	CARDIAC CONGENITAL AND VALVULAR DISORDERS WITH MCC	05	1.5368
307	CARDIAC CONGENITAL AND VALVULAR DISORDERS WITHOUT MCC	05	0.9426

The relative weight of a diagnostic related group determines the reimbursement rate based on the severity of a patient's illness and the associated cost of care during hospitalization.

Present on Admission (POA)

Q24.5 is exempt from POA reporting - The Present on Admission (POA) indicator is used for diagnosis codes included in claims involving inpatient admissions to general acute care hospitals. POA indicators must be reported to CMS on each claim to facilitate the grouping of diagnoses codes into the proper Diagnostic Related Groups (DRG). CMS publishes a listing of specific diagnosis codes that are exempt from the POA reporting requirement. Review other POA exempt codes here.

CMS POA Indicator Options and Definitions

POA Indicator	Reason for Code	CMS will pay the CC/MCC DRG?
Y	Diagnosis was present at time of inpatient admission.	YES
N	Diagnosis was not present at time of inpatient admission.	NO
U	Documentation insufficient to determine if the condition was present at the time of inpatient admission.	NO
W	Clinically undetermined - unable to clinically determine whether the condition was present at the time of inpatient admission.	YES
1	Unreported/Not used - Exempt from POA reporting.	NO

Convert Q24.5 to ICD-9-CM

• ICD-9-CM Code: 746.85 - Coronary artery anomaly
  Approximate Flag - The approximate mapping means there is not an exact match between the ICD-10 and ICD-9 codes and the mapped code is not a precise representation of the original code.

Patient Education

Congenital Heart Defects

What are congenital heart defects?

Congenital heart defects (CHDs) are problems with the structure of the heart. "Congenital" means that that the problems are present at birth. These defects happen when a baby's heart doesn't develop normally during pregnancy. Congenital heart defects are the most common type of birth defect.

Congenital heart defects can change the way the heart pumps blood. They may make blood flow too slowly, go the wrong way, or block it completely.

There are many types of congenital heart defects. They can happen in one or more parts of the heart. The most common types are:

• Septal defects ("hole in the heart") - openings in the wall between the left and right sides of the heart
• Heart valve defects - problems with the valves that control the flow of blood through the heart
• Defects in the large blood vessels that carry blood in and out of the heart

Congenital heart defects can range from very mild problems that never need treatment to life-threatening problems at birth. The most serious congenital heart defects are called critical congenital heart disease. Babies with these defects usually need surgery in the first year of life. But the symptoms of milder heart defects may not show up until childhood or adulthood.

What causes congenital heart defects?

Researchers often don't know what causes congenital heart defects. They do know that changes in a baby's genes sometimes cause a heart defect. The changed genes may come from the parents, or the changes may happen during pregnancy.

Who is more likely to have a baby with a congenital heart defect?

Several things may increase the chance that your baby has a congenital heart defect, such as:

• Your health before and during pregnancy, including
  • Having diabetes before pregnancy or developing it in the first 3 months of pregnancy (diabetes that develops later in pregnancy isn't a major risk for heart defects). Carefully controlling your blood sugar before and during pregnancy can lower your baby's risk of congenital heart defects.
  • Having phenylketonuria (PKU), a rare inherited disorder that affects how the body uses a protein in foods. If you have PKU, eating a low-protein diet before getting pregnant can lower your baby's risk of having a congenital heart defect.
  • Having rubella (German measles) during pregnancy.
• Your contact with certain substances during pregnancy, including
  • Smoking or secondhand smoke (breathing smoke from another smoker).
  • Certain medicines, such as angiotensin-converting (ACE) inhibitors for high blood pressure and retinoic acids for acne. If you're pregnant or plan to get pregnant, talk with your health care provider about all the medicines you take.
• Your family history and genetics. In most cases, congenital heart defects don't run in families. But your chance of having a baby with a congenital heart defect does go up if you or the other parent has a congenital heart defect, or if you already have a child with a congenital heart defect.

What are the symptoms of congenital heart defects?

Congenital heart defects don't cause pain. The signs and symptoms are different, depending on the type and number of defects and how serious they are.

Common signs and symptoms of congenital heart defects include:

• Cyanosis - a bluish color to the skin, lips, and fingernails. It happens when there isn't enough oxygen in the blood
• Fatigue - your baby may be unusually sleepy and may become very tired during feedings
• Poor blood flow
• Fast or difficult breathing
• Heart murmur - an unusual sound between heartbeats

What other problems do congenital heart defects cause?

Congenital heart defects don't always cause other problems. If they do, which problems you have would depend on the type and number of defects and how serious the defects are.

Children with congenital heart defects are more likely to:

• Be smaller than other children
• Have problems or delays in mental, and emotional growth, and behavior, such as:
  • Speech and language problems
  • Attention deficit hyperactivity disorders (ADHD)

People with congenital heart defects may develop other health conditions, including:

• Endocarditis - an infection of lining of the heart and valves
• Arrhythmia - a problem with the rate or rhythm of your heartbeat
• Heart failure - when your heart can't pump enough blood to the body
• Pulmonary hypertension - high blood pressure in your lungs
• Kidney and liver disease

How are congenital heart defects diagnosed?

• Before a baby is born, your provider may use ultrasound pictures of the baby's heart to look for heart defects. This is called a fetal echocardiogram. It's done between weeks 18 and 22 of pregnancy.
• During the first few days after birth, all newborns are checked for congenital heart defects. A pulse oximeter is clipped to your baby's hands or feet to measure blood oxygen. If it shows low levels of blood oxygen, more tests will be needed to find out if your baby has a heart defect.
• To diagnose congenital heart defects in babies, children, and adults, a provider may use many tools, including:
  • A physical exam.
  • Certain heart tests to see how the heart is working.
  • Genetic testing to see if certain gene problems caused the defect.

What are the treatments for congenital heart defects?

Treatment depends on the type of congenital heart defect and how serious it is. Possible treatments include:

• Cardiac catheterization to repair simple defects, such as a small hole in the inside wall of the heart. A catheterization uses a thin tube guided through a vein and into the heart.
• Heart surgery may be needed to:
  • Repair defects in the heart and blood vessels.
  • Repair or replace a heart valve.
  • Place a device in the chest to help the heart pump blood.
  • Do a heart transplant.
• Medicine is often used if your baby has a specific type of congenital heart defect called patent ductus arteriosus.

All children and adults who have congenital heart defects need regular follow-up care from a cardiologist (a doctor who specializes in heart diseases) throughout their life, even if their defect was repaired.

Some people may need several heart surgeries or catheterizations over the years. They may also need to take medicines to help their hearts work as well as possible.

NIH: National Heart, Lung, and Blood Institute

[Learn More in MedlinePlus]

Code History

• FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
• FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
• FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
• FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
• FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
• FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
• FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
• FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
• FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.