I42.1
BillableObstructive hypertrophic cardiomyopathy
Obstructive hypertrophic cardiomyopathy
Coding Notes
Inclusion Terms
Alternative clinical terms for this condition
- Hypertrophic subaortic stenosis (idiopathic)
Includes
Conditions included under this code
- myocardiopathy
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
- •ischemic cardiomyopathyI25.5
- •peripartum cardiomyopathyO90.3
- •ventricular hypertrophyI51.7
Code First
The underlying condition must be sequenced before this code
Related Codes(9)
I42.0Dilated cardiomyopathy
I42.2Other hypertrophic cardiomyopathy
I42.3Endomyocardial (eosinophilic) disease
I42.4Endocardial fibroelastosis
I42.5Other restrictive cardiomyopathy
I42.6Alcoholic cardiomyopathy
I42.7Cardiomyopathy due to drug and external agent
I42.8Other cardiomyopathies
I42.9Cardiomyopathy, unspecified
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(46)
SNOMED CT
UMLS
- Cardiomyopathies, Hypertrophic ObstructiveC4551472
- Cardiomyopathy, Hypertrophic ObstructiveC4551472
- HOCM - Hypertrophic obstructive cardiomyopathyC4551472
- HOCM Hypertrophic obstructive cardiomyopathyC4551472
- Hypertrophic Obstructive CardiomyopathiesC4551472
- Hypertrophic Obstructive CardiomyopathyC4551472
- Hypertrophic cardiomyopathy, obstructiveC4551472
- Hypertrophic obstructive cardiomyopathyC4551472
- Hypertrophic obstructive cardiomyopathy (disorder)C4551472
- Obstructive Cardiomyopathies, HypertrophicC4551472
- Obstructive Cardiomyopathy, HypertrophicC4551472
- Obstructive cardiomyopathyC4551472
- Obstructive hypertrophic cardiomyopathyC4551472
- HYPERTROPHIC SUBAORTIC STENOSIS, IDIOPATHICC0700053
- Hypertrophic Subaortic Stenosis, IdiopathicC0700053
- Hypertrophic subaortic stenosis (idiopathic)C0700053
- IHSSC0700053
- IHSS (idiopathic hypertrophic subaortic stenosis)C0700053
- Idiopathic hypertrophic subaortic stenosisC0700053
- Subaortic hypertrophic stenosisC0700053
- hypertrophic subaortic stenosisC0700053
- idiopathic hypertrophic subaortic stenosisC0700053
- ihssC0700053
- ihsssC0700053
Clinical Terms
- Obstructive Cardiomyopathy, Hypertrophic
- Hypertrophic Obstructive Cardiomyopathy
- Cardiomyopathies, Hypertrophic Obstructive
- Hypertrophic obstructive cardiomyopathy (disorder)
- Obstructive Cardiomyopathies, Hypertrophic
- Subaortic hypertrophic stenosis
- hypertrophic subaortic stenosis
- Hypertrophic subaortic stenosis (idiopathic)
- HOCM Hypertrophic obstructive cardiomyopathy
- ihsss
- HOCM - Hypertrophic obstructive cardiomyopathy
- idiopathic hypertrophic subaortic stenosis
- IHSS (idiopathic hypertrophic subaortic stenosis)
- HYPERTROPHIC SUBAORTIC STENOSIS, IDIOPATHIC
- IHSS
- Cardiomyopathy, Hypertrophic Obstructive
- Hypertrophic Obstructive Cardiomyopathies
- Obstructive cardiomyopathy
- Hypertrophic cardiomyopathy, obstructive
Frequently Asked Questions
What is the ICD-10 code for obstructive hypertrophic cardiomyopathy?
The ICD-10-CM code for obstructive hypertrophic cardiomyopathy is I42.1. The full clinical description is "Obstructive hypertrophic cardiomyopathy". I42.1 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code I42.1 mean?
ICD-10-CM code I42.1 represents “Obstructive hypertrophic cardiomyopathy”. 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 I42.1 a billable code?
Yes, I42.1 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is I42.1 in?
I42.1 is in Chapter 9: Diseases of the Circulatory System (codes I00-I99).
What SNOMED CT codes does I42.1 map to?
I42.1 maps to 1 SNOMED CT concept: 45227007. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for I42.1?
I42.1 is linked to 2 UMLS Concept Unique Identifiers: C4551472, C0700053. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does I42.1 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like obstructive hypertrophic cardiomyopathy 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 I42.1?
I42.1 maps to the ICD-11 code: BC43.12 (Obstructive hypertrophic cardiomyopathy).
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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.