E21Hyperparathyroidism and other disorders of parathyroid gland
ICD-10-CM category (non-billable header) code — part of Disorders of other endocrine glands (E20-E35)
Coding Notes
Excludes1 (never code both together)
- adult osteomalacia (M83.-)
- ectopic hyperparathyroidism (E34.2)
- hungry bone syndrome (E83.81)
- infantile and juvenile osteomalacia (E55.0)
Excludes2 (not part of this condition — may code both)
- familial hypocalciuric hypercalcemia (E83.52)
Subcategories (6)
- E21.0 Primary hyperparathyroidism
- E21.1 Secondary hyperparathyroidism, not elsewhere classified
- E21.2 Other hyperparathyroidism
- E21.3 Hyperparathyroidism, unspecified
- E21.4 Other specified disorders of parathyroid gland
- E21.5 Disorder of parathyroid gland, unspecified