I51.9
BillableHeart disease, unspecified
Heart disease, unspecified
Coding Notes
Excludes 1
Codes that cannot be used together with this code (mutual exclusion)
Excludes 2
Conditions not included here, but the patient may have both
- •certain conditions originating in the perinatal periodP04-P96
- •certain infectious and parasitic diseasesA00-B99
- •complications of pregnancy, childbirth and the puerperiumO9A)O00
- •congenital malformations, deformations, and chromosomal abnormalitiesQ00-Q99
- •endocrine, nutritional and metabolic diseasesE00-E88
- •injury, poisoning and certain other consequences of external causesS00-T88
- •neoplasmsC00-D49
- •symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classifiedR00-R94
- •systemic connective tissue disordersM30-M36
- •transient cerebral ischemic attacks and related syndromesG45
Related Codes(8)
I51.0Cardiac septal defect, acquired
I51.1Rupture of chordae tendineae, not elsewhere classified
I51.2Rupture of papillary muscle, not elsewhere classified
I51.3Intracardiac thrombosis, not elsewhere classified
I51.4Myocarditis, unspecified
I51.5Myocardial degeneration
I51.7Cardiomegaly
I51.8Other ill-defined heart diseases
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(170)
SNOMED CT
- Cardiac complication40172005
- Cardiac complications of care40172005
- Absent smell44169009
- Anosmia44169009
- Anosmia (loss of sense of smell)44169009
- Loss of sense of smell44169009
- Loss of the sense of smell44169009
- No sense of smell44169009
- Sense of smell absent44169009
- Sense of smell lost44169009
- Cardiac disorder56265001
- Cardiopathy56265001
- Disorder of heart56265001
- Heart disease56265001
- Morbus cordis56265001
- Cardiac cirrhosis74669004
- Congestive cirrhosis74669004
- Hepatic congestion76281005
- Heart disease in mother complicating pregnancy, childbirth AND/OR puerperium78381004
- Anosmia eunuchoidism93559003
- Dysplasia olfactogenitalis of de Morsier93559003
- Gonadotrophin deficiency with anosmia93559003
- Hypogonadism with anosmia93559003
- Kallman syndrome93559003
- Kallman's syndrome93559003
- Kallmann's syndrome93559003
- Olfactogenital dysplasia93559003
- Acute heart disease127337006
- Chronic disease of heart128238001
- Chronic disorder of heart128238001
- Chronic heart disease128238001
- Chronic heart disorder128238001
- Cardiac treatment changed170576007
- Cardiac: dubious diagnostic criteria170580002
- Cachectic238108007
- Cachexia238108007
- Cardiac portal cirrhosis266470007
- Cardiac disease treatment started268510008
- Cardiac disease in pregnancy274121004
- Cardiac cachexia284529003
- Myocardial lesion301122000
- Distribution of body fat loss - finding366535007
- Finding of distribution of body fat loss366535007
- Disorder of right cardiac ventricle415992005
- Hypogonadotropic hypogonadism due to isolated gonadotrophin deficiency420499009
- Hypogonadotropic hypogonadism due to isolated gonadotropin deficiency420499009
- Heart disease caused by ionising radiation430401005
- Heart disease caused by ionizing radiation430401005
- Disorder of left atrium as complication of procedure472766002
- Heart disease co-occurrent with human immunodeficiency virus infection713298006
- Kallman syndrome with cardiopathy722027009
- Kallman syndrome with heart disease722027009
- Heart disease in childbirth10753101000119102
- Heart disease in mother complicating childbirth10753101000119102
UMLS
- CARDIAC DISC0018799
- CardC0018799
- Cardiac DiseaseC0018799
- Cardiac DiseasesC0018799
- Cardiac DisorderC0018799
- Cardiac DisordersC0018799
- Cardiac diseasesC0018799
- Cardiac disorderC0018799
- Cardiac disorder NOSC0018799
- Cardiac disordersC0018799
- CardiopathyC0018799
- Disorder cardiac (NOS)C0018799
- Disorder of heartC0018799
- HEART DISC0018799
- Heart DiseaseC0018799
- Heart DiseasesC0018799
- Heart DisorderC0018799
- Heart DisordersC0018799
- Heart diseaseC0018799
- Heart disease (disorder)C0018799
- Heart disease, unspecifiedC0018799
- Heart disorderC0018799
- Morbus cordisC0018799
- cardiac diseaseC0018799
- cardiac diseasesC0018799
- cardiac disorderC0018799
- cardiac disordersC0018799
- cardiopathiesC0018799
- cardiopathyC0018799
- disease cardiacC0018799
- disease disorders heartC0018799
- disease heartsC0018799
- diseases disorders heartC0018799
- diseases of the heartC0018799
- disorder heartC0018799
- heart diseaseC0018799
- heart disease disorderC0018799
- heart diseasesC0018799
- heart disorderC0018799
- heart disordersC0018799
- morbus cordisC0018799
- syndrome heart diseaseC0018799
Clinical Terms
- Cardiac disease treatment started
- Absent smell
- Cardiac disorders
- Heart disease (disorder)
- cardiac disorder
- Distribution of body fat loss - finding
- Myocardial lesion
- Cachectic
- Dysplasia olfactogenitalis of de Morsier
- Cardiac disorder NOS
- Kallman syndrome with heart disease
- disease hearts
- disease disorders heart
- heart diseases
- Cardiac disease in pregnancy
- Olfactogenital dysplasia
- Disorder of left atrium as complication of procedure
- Congestive cirrhosis
- No sense of smell
- Acute heart disease
- Kallmann's syndrome
- Gonadotrophin deficiency with anosmia
- Heart disease caused by ionising radiation
- Cardiac: dubious diagnostic criteria
- disorder heart
- Sense of smell absent
- Anosmia (loss of sense of smell)
- Cardiac cachexia
- Hypogonadism with anosmia
- Sense of smell lost
- Loss of sense of smell
- Heart disease in childbirth
- cardiac disease
- Cardiac portal cirrhosis
- Disorder cardiac (NOS)
- Heart disease caused by ionizing radiation
- Disorder of heart
- Cardiac complications of care
- disease cardiac
- Cardiac complication
- CARDIAC DIS
- Chronic disease of heart
- HEART DIS
- morbus cordis
- Heart disease in mother complicating childbirth
- Heart disease co-occurrent with human immunodeficiency virus infection
- Finding of distribution of body fat loss
- Chronic heart disease
- Disorder of right cardiac ventricle
- Hypogonadotropic hypogonadism due to isolated gonadotrophin deficiency
- Cardiac Diseases
- Chronic disorder of heart
- Chronic heart disorder
- heart disorder
- Hepatic congestion
- Cardiac cirrhosis
- diseases disorders heart
- Kallman's syndrome
- cardiopathy
- syndrome heart disease
- Anosmia
- Anosmia eunuchoidism
- Cachexia
- heart disease disorder
- Loss of the sense of smell
- Heart Disorders
- Kallman syndrome
- cardiopathies
- Heart disease in mother complicating pregnancy, childbirth AND/OR puerperium
- Cardiac treatment changed
- Card
- diseases of the heart
- Hypogonadotropic hypogonadism due to isolated gonadotropin deficiency
- Kallman syndrome with cardiopathy
Frequently Asked Questions
What is the ICD-10 code for heart disease, unspecified?
The ICD-10-CM code for heart disease, unspecified is I51.9. The full clinical description is "Heart disease, unspecified". I51.9 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code I51.9 mean?
ICD-10-CM code I51.9 represents “Heart disease, unspecified”. It is classified under Chapter 9: Diseases of the Circulatory System and is a billable/specific code that can be used on a claim.
Is I51.9 a billable code?
Yes, I51.9 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is I51.9 in?
I51.9 is in Chapter 9: Diseases of the Circulatory System (codes I00-I99).
What codes cannot be used with I51.9?
I51.9 has Excludes1 notes indicating codes that cannot be used together with it, including: any condition in I51.4-I51.9 due to hypertension (I11.-); any condition in I51.4-I51.9 due to hypertension and chronic kidney disease (I13.-); heart disease specified as rheumatic (I00-I09).
What SNOMED CT codes does I51.9 map to?
I51.9 maps to 25 SNOMED CT concepts: 44169009, 127337006, 93559003, 238108007, 284529003, and 20 more. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for I51.9?
I51.9 is linked to 1 UMLS Concept Unique Identifier: C0018799. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does I51.9 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like heart disease, unspecified affect a person's functioning — body functions, activities, participation, and environmental factors. AutoICD provides ICF Core Sets for 12+ conditions and can map clinical text to ICF categories automatically. Browse the ICF directory to explore functioning codes.
What is the ICD-11 equivalent of I51.9?
I51.9 maps to the ICD-11 code: BC4Z (Diseases of the myocardium or cardiac chambers, unspecified).
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Includes SNOMED Clinical Terms® (SNOMED CT®) used by permission of SNOMED International. Includes content from the UMLS Metathesaurus, courtesy of the U.S. National Library of Medicine.