E21.4
✓ Billable
Other specified disorders of parathyroid gland
ICD-10-CM · FY2026 · Endocrine, Nutritional and Metabolic Diseases
Code
E21.4
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Endocrine, Nutritional and Metabolic Diseases
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code E21.4?
ICD-10-CM code E21.4 represents Other specified disorders of parathyroid gland. It is a billable diagnosis code in the Endocrine, Nutritional and Metabolic Diseases chapter, effective October 1, 2025 – September 30, 2026.
Is E21.4 billable?
Yes. E21.4 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is E21.4 in?
E21.4 belongs to the Endocrine, Nutritional and Metabolic Diseases chapter (E00–E89) of ICD-10-CM.
Related codes in the E21 category
E21
Hyperparathyroidism and other disorders of parathyroid gland
Non-billable
E21.0
Primary hyperparathyroidism
Billable
E21.1
Secondary hyperparathyroidism, not elsewhere classified
Billable
E21.2
Other hyperparathyroidism
Billable
E21.3
Hyperparathyroidism, unspecified
Billable
E21.5
Disorder of parathyroid gland, unspecified
Billable
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