ICD-10 Diagnosis Code Q21.3

Diagnostic Related Groups
The diagnosis code Q21.3 is grouped in the following Diagnostic Related Group(s) (MS-DRG V35.0)

• 306 - CARDIAC CONGENITAL AND VALVULAR DISORDERS WITH MCC
• 307 - CARDIAC CONGENITAL AND VALVULAR DISORDERS WITHOUT MCC

Convert to ICD-9

• 745.2 - Tetralogy of fallot

Present on Admission (POA)
The code Q21.3 is exempt from POA reporting.

Clinical Information
Notes:

• Tetralogy of Fallot: A combination of congenital heart defects consisting of four key features including VENTRICULAR SEPTAL DEFECTS; PULMONARY STENOSIS; RIGHT VENTRICULAR HYPERTROPHY; and a dextro-positioned AORTA. In this condition, blood from both ventricles (oxygen-rich and oxygen-poor) is pumped into the body often causing CYANOSIS.

Terms:

• Fallot's Tetralogy

Synonyms

• Anterior deviation of infundibular septum of Fallot type
• Atrioventricular septal defect associated with tetralogy of Fallot
• Congenital absence of pulmonary valve
• Dextraposition of aorta in Fallot's tetralogy
• Fallot complex with intellectual disability and growth delay syndrome
• Growth retardation
• Overriding aorta
• Pulmonary atresia with ventricular septal defect
• Pulmonary atresia with ventricular septal defect
• Pulmonary atresia with ventricular septal defect of Fallot type
• Tetralogy of Fallot
• Tetralogy of Fallot with absent pulmonary valve
• Tetralogy of Fallot with pulmonary atresia
• Tetralogy of Fallot with pulmonary stenosis
• Ventricular septal defect in Fallot's tetralogy

Index to Diseases and Injuries
References found for the code Q21.3 in the Index to Diseases and Injuries:

• - Anomaly, anomalous (congenital) (unspecified type) - Q89.9
  • - heart - Q24.9
    • - septum - Q21.9
      • - interventricular - Q21.0
        • - with pulmonary stenosis or atresia, dextraposition of aorta and hypertrophy of right ventricle - Q21.3
      • - ventricular - Q21.0
        • - with pulmonary stenosis or atresia, dextraposition of aorta and hypertrophy of right ventricle - Q21.3
    • - tetralogy of Fallot - Q21.3

• - Defect, defective - Q89.9
  • - interventricular septal - Q21.0
    • - with dextroposition of aorta, pulmonary stenosis and hypertrophy of right ventricle - Q21.3
    • - in tetralogy of Fallot - Q21.3
  • - ventricular septal - Q21.0
    • - in tetralogy of Fallot - Q21.3

• - Dextraposition, aorta - Q20.3
  • - in tetralogy of Fallot - Q21.3

• - Fallot's
  • - tetrad or tetralogy - Q21.3

• - Hypertrophy, hypertrophic
  • - ventricle, ventricular (heart) - See Also: Hypertrophy, cardiac;
    • - in tetralogy of Fallot - Q21.3

• - Imperfect
  • - closure (congenital)
    • - septum
      • - interventricular - Q21.0
        • - in tetralogy of Fallot - Q21.3
      • - ventricular - Q21.0
        • - with pulmonary stenosis or atresia, dextraposition of aorta, and hypertrophy of right ventricle - Q21.3
        • - in tetralogy of Fallot - Q21.3

• - Stenosis, stenotic (cicatricial) - See Also: Stricture;
  • - pulmonary (artery) (congenital) - Q25.6
    • - with ventricular septal defect, transposition of aorta, and hypertrophy of right ventricle - Q21.3
    • - in tetralogy of Fallot - Q21.3

• - Syndrome - See Also: Disease;
  • - Fallot's - Q21.3

• - Tetralogy of Fallot - Q21.3

Tabular List of Diseases and Injuries
References found for the code Q21.3 in the Tabular List of Diseases and Injuries:

• Inclusion Terms:
  • Ventricular septal defect WITH pulmonary stenosis or atresia, dextroposition of aorta and hypertrophy of right ventricle.

Congenital Heart Defects

A congenital heart defect is a problem with the structure of the heart. It is present at birth. Congenital heart defects are the most common type of birth defect. The defects can involve the walls of the heart, the valves of the heart, and the arteries and veins near the heart. They can disrupt the normal flow of blood through the heart. The blood flow can slow down, go in the wrong direction or to the wrong place, or be blocked completely.

Doctors use a physical exam and special heart tests to diagnose congenital heart defects. They often find severe defects during pregnancy or soon after birth. Signs and symptoms of severe defects in newborns include

• Rapid breathing
• Cyanosis - a bluish tint to the skin, lips, and fingernails
• Fatigue
• Poor blood circulation

Many congenital heart defects cause few or no signs and symptoms. They are often not diagnosed until children are older.

Many children with congenital heart defects don't need treatment, but others do. Treatment can include medicines, catheter procedures, surgery, and heart transplants. The treatment depends on the type of the defect, how severe it is, and a child's age, size, and general health.

NIH: National Heart, Lung, and Blood Institute

• Atrial septal defect (Medical Encyclopedia)
• Bicuspid aortic valve (Medical Encyclopedia)
• Congenital heart defect corrective surgeries (Medical Encyclopedia)
• Congenital heart disease (Medical Encyclopedia)
• Cyanotic heart disease (Medical Encyclopedia)
• Dextrocardia (Medical Encyclopedia)
• Echocardiogram -- children (Medical Encyclopedia)
• Heart murmurs and other sounds (Medical Encyclopedia)
• Patent ductus arteriosus (Medical Encyclopedia)
• Ventricular septal defect (Medical Encyclopedia)

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Critical congenital heart disease Critical congenital heart disease (CCHD) is a term that refers to a group of serious heart defects that are present from birth. These abnormalities result from problems with the formation of one or more parts of the heart during the early stages of embryonic development. CCHD prevents the heart from pumping blood effectively or reduces the amount of oxygen in the blood. As a result, organs and tissues throughout the body do not receive enough oxygen, which can lead to organ damage and life-threatening complications. Individuals with CCHD usually require surgery soon after birth.Although babies with CCHD may appear healthy for the first few hours or days of life, signs and symptoms soon become apparent. These can include an abnormal heart sound during a heartbeat (heart murmur), rapid breathing (tachypnea), low blood pressure (hypotension), low levels of oxygen in the blood (hypoxemia), and a blue or purple tint to the skin caused by a shortage of oxygen (cyanosis). If untreated, CCHD can lead to shock, coma, and death. However, most people with CCHD now survive past infancy due to improvements in early detection, diagnosis, and treatment.Some people with treated CCHD have few related health problems later in life. However, long-term effects of CCHD can include delayed development and reduced stamina during exercise. Adults with these heart defects have an increased risk of abnormal heart rhythms, heart failure, sudden cardiac arrest, stroke, and premature death.Each of the heart defects associated with CCHD affects the flow of blood into, out of, or through the heart. Some of the heart defects involve structures within the heart itself, such as the two lower chambers of the heart (the ventricles) or the valves that control blood flow through the heart. Others affect the structure of the large blood vessels leading into and out of the heart (including the aorta and pulmonary artery). Still others involve a combination of these structural abnormalities.People with CCHD have one or more specific heart defects. The heart defects classified as CCHD include coarctation of the aorta, double-outlet right ventricle, D-transposition of the great arteries, Ebstein anomaly, hypoplastic left heart syndrome, interrupted aortic arch, pulmonary atresia with intact septum, single ventricle, total anomalous pulmonary venous connection, tetralogy of Fallot, tricuspid atresia, and truncus arteriosus.
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General Equivalence Map Definitions
The ICD-10 and ICD-9 GEMs are used to facilitate linking between the diagnosis codes in ICD-9-CM and the new ICD-10-CM code set. The GEMs are the raw material from which providers, health information vendors and payers can derive specific applied mappings to meet their needs.

• Approximate Flag - The approximate flag is on, indicating that the relationship between the code in the source system and the code in the target system is an approximate equivalent.
• No Map Flag - The no map flag indicates that a code in the source system is not linked to any code in the target system.
• Combination Flag - The combination flag indicates that more than one code in the target system is required to satisfy the full equivalent meaning of a code in the source system.

Index of Diseases and Injuries Definitions

• And - The word "and" should be interpreted to mean either "and" or "or" when it appears in a title.
• Code also note - A "code also" note instructs that two codes may be required to fully describe a condition, but this note does not provide sequencing direction.
• Code first - Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions, the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists, there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation.
• Type 1 Excludes Notes - 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.
• Type 2 Excludes Notes - A type 2 Excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
• Includes Notes - This note appears immediately under a three character code title to further define, or give examples of, the content of the category.
• Inclusion terms - List of terms is included under some codes. 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.
• NEC "Not elsewhere classifiable" - This abbreviation in the Alphabetic Index represents "other specified". When a specific code is not available for a condition, the Alphabetic Index directs the coder to the "other specified” code in the Tabular List.
• NOS "Not otherwise specified" - This abbreviation is the equivalent of unspecified.
• See - The "see" instruction following a main term in the Alphabetic Index indicates that another term should be referenced. It is necessary to go to the main term referenced with the "see" note to locate the correct code.
• See Also - A "see also" instruction following a main term in the Alphabetic Index instructs that there is another main term that may also be referenced that may provide additional Alphabetic Index entries that may be useful. It is not necessary to follow the "see also" note when the original main term provides the necessary code.
• 7th Characters - Certain ICD-10-CM categories have applicable 7th characters. The applicable 7th character is required for all codes within the category, or as the notes in the Tabular List instruct. The 7th character must always be the 7th character in the data field. If a code that requires a 7th character is not 6 characters, a placeholder X must be used to fill in the empty characters.
• With - The word "with" should be interpreted to mean "associated with" or "due to" when it appears in a code title, the Alphabetic Index, or an instructional note in the Tabular List. The word "with" in the Alphabetic Index is sequenced immediately following the main term, not in alphabetical order.

Present on Admission
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.