ICD-10-CM Code Q21.8
Other congenital malformations of cardiac septa
Billable Code
Billable codes are sufficient justification for admission to an acute care hospital when used a principal diagnosis.POA Exempt Code
The Center for Medicare & Medicaid Services (CMS) requires medical coders to indicate whether or not a condition was present at the time of admission, in order to properly assign MS-DRG codes. This "Present On Admission" (POA) indicator is recorded on CMS form 4010A.Q21.8 is a billable ICD code used to specify a diagnosis of other congenital malformations of cardiac septa. A 'billable code' is detailed enough to be used to specify a medical diagnosis.
POA Indicators on CMS form 4010A are as follows:
| Indicator | Meaning | CMS Will Pay CC/MCC DRG Costs |
|---|---|---|
| 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. Provider unable to clinically determine whether the condition was present at the time of inpatient admission. | Yes |
| 1 | Exempt from POA reporting | No |
The ICD code Q218 is used to code Eisenmenger's syndrome
Eisenmenger's syndrome (or ES, Eisenmenger's reaction or tardive cyanosis) is defined as the process in which a long-standing left-to-right cardiac shunt caused by a congenital heart defect (typically by a ventricular septal defect, atrial septal defect, or less commonly, patent ductus arteriosus) causes pulmonary hypertension and eventual reversal of the shunt into a cyanotic right-to-left shunt. Because of the advent of fetal screening with echocardiography early in life, the incidence of heart defects progressing to Eisenmenger's has decreased.
| Specialty: | Medical Genetics |
| MeSH Codes: | D004541, D004541 |
| ICD 9 Codes: | 745.4, 745.410 |
Schematic drawing showing the principles of Eisenmenger's syndrome
Coding Notes for Q21.8 Info for medical coders on how to properly use this ICD-10 code
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Inclusion Terms:
Inclusion Terms
Inclusion Terms are a list of concepts for which a specific code is used. The list of Inclusion Terms is useful for determining the correct code in some cases, but the list is not necessarily exhaustive. - Eisenmenger's defect
- Pentalogy of Fallot
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Code Type-1 Excludes:
Type-1 Excludes
Type-1 Excludes mean the conditions excluded are mutually exclusive and should never be coded together. Excludes 1 means "do not code here." - Eisenmenger's complex - instead, use code I27.8
- Eisenmenger's syndrome - instead, use code I27.8
MS-DRG Mapping
- DRG Group #306-307 - Cardiac congenital and valvular disorders with MCC.
- DRG Group #306-307 - Cardiac congenital and valvular disorders without MCC.
Related Concepts SNOMET-CT
- Pentalogy of Fallot (disorder)
- Spontaneous closure of ventricular septal defect due to prolapse of cusp of aortic valve (finding)
ICD-10-CM Alphabetical Index References for 'Q21.8 - Other congenital malformations of cardiac septa'
The ICD-10-CM Alphabetical Index links the below-listed medical terms to the ICD code Q21.8. Click on any term below to browse the alphabetical index.
Equivalent ICD-9 Code GENERAL EQUIVALENCE MAPPINGS (GEM)
This is the official approximate match mapping between ICD9 and ICD10, as provided by the General Equivalency mapping crosswalk. This means that while there is no exact mapping between this ICD10 code Q21.8 and a single ICD9 code, 745.8 is an approximate match for comparison and conversion purposes.
Parent Code: Q21 - Congenital malformations of cardiac septa