E21.1 Secondary hyperparathyroidism, not elsewhere classified
Instructional Notes:
E21.1 Description: Secondary hyperparathyroidism, not elsewhere classified Exclude1:
secondary hyperparathyroidism of renal origin (N25.81)
↓
E21 Description: Hyperparathyroidism and other disorders of parathyroid gland Exclude1:
adult osteomalacia (M83.-)
ectopic hyperparathyroidism (E34.2)
hungry bone syndrome (E83.81)
infantile and juvenile osteomalacia (E55.0)
Exclude2:
familial hypocalciuric hypercalcemia (E83.52)
↓
E20-E35 Description: Disorders of other endocrine glands (E20-E35) Exclude1:
galactorrhea (N64.3)
gynecomastia (N62)
↓
E00-E89 Description: Endocrine, nutritional and metabolic diseases Exclude1:
transitory endocrine and metabolic disorders specific to newborn (P70-P74)
Notes:
All neoplasms, whether functionally active or not, are classified in Chapter 2. Appropriate codes in this chapter (i.e. E05.8, E07.0, E16-E31, E34.-) may be used as additional codes to indicate either functional activity by neoplasms and ectopic endocrine tissue or hyperfunction and hypofunction of endocrine glands associated with neoplasms and other conditions classified elsewhere.