ICD-10-CM Book 2025 Edition
Chapters ICD-10-CM Book Table of Content /
chapter 4 E00-E89 Endocrine, nutritional and metabolic diseases /
E20-E35 Disorders of other endocrine glands /
E21 Hyperparathyroidism and other disorders of parathyroid gland
Billable ICD-10-CM Code E21.1
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E21.1
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Secondary hyperparathyroidism, not elsewhere classified
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