E21.1
BillableSecondary hyperparathyroidism, not elsewhere classified
Secondary hyperparathyroidism, not elsewhere classified
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
Related Codes(5)
ICD-11 Equivalents(1)
ICD-11 Equivalents
View full mappingCorresponding ICD-11 codes from the WHO crosswalk mapping
Also Known As / Clinical Terms(10)
SNOMED CT
Clinical Terms
- Hyperparathyroidism due to vitamin D deficiency
- Hyperparathyroidism due to 1,25(0H)>2<D>3<
- Hyperparathyroidism due to intestinal malabsorption
- Secondary hyperparathyroidism of nonrenal origin
Frequently Asked Questions
What is the ICD-10 code for secondary hyperparathyroidism, not elsewhere classified?
The ICD-10-CM code for secondary hyperparathyroidism, not elsewhere classified is E21.1. The full clinical description is "Secondary hyperparathyroidism, not elsewhere classified". E21.1 is a billable/specific code that can be used on insurance claims and medical billing.
What does ICD-10 code E21.1 mean?
ICD-10-CM code E21.1 represents “Secondary hyperparathyroidism, not elsewhere classified”. It is classified under Chapter 4: Endocrine, Nutritional and Metabolic Diseases and is a billable/specific code that can be used on a claim.
Is E21.1 a billable code?
Yes, E21.1 is a billable/specific ICD-10-CM code and can be used to indicate a diagnosis on a medical claim.
What chapter is E21.1 in?
E21.1 is in Chapter 4: Endocrine, Nutritional and Metabolic Diseases (codes E00-E89).
What codes cannot be used with E21.1?
E21.1 has Excludes1 notes indicating codes that cannot be used together with it, including: transitory endocrine and metabolic disorders specific to newborn (P70-P74); galactorrhea (N64.3); gynecomastia (N62); and 5 more.
What SNOMED CT codes does E21.1 map to?
E21.1 maps to 4 SNOMED CT concepts: 47445009, 78625002, 91478007, 89471000119102. SNOMED CT is a clinical terminology used in electronic health records.
What are the UMLS CUIs for E21.1?
E21.1 is linked to 1 UMLS Concept Unique Identifier: C0494305. The UMLS (Unified Medical Language System) integrates multiple biomedical vocabularies maintained by the U.S. National Library of Medicine.
How does E21.1 relate to ICF functioning codes?
ICF (International Classification of Functioning, Disability and Health) codes describe how conditions like secondary hyperparathyroidism, not elsewhere classified 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 E21.1?
E21.1 maps to the ICD-11 code: 5A51.1 (Secondary hyperparathyroidism).
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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.