ICD-10-CM › E00-E89 › E20-E35 › E codes › E21

E21

Hyperparathyroidism and other disorders of parathyroid gland

Not billableICD-10-CM diagnosis code.

This code exists but cannot be submitted on its own. It groups the more specific codes beneath it.

A category header for its whole life, FY2016 onwards. It has never been valid for submission on its own.

Submit one of these 6 more specific codes instead:

  • 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

What has happened to this code

Every change the publisher made, from 2012 to now. Entries marked draft are from the pre-implementation releases: ICD-10 took effect on 1 October 2015, so nothing before FY2016 was ever valid on a claim.

  1. FY2012 Added to the draft code set draft Hyperparathyroidism and other disorders of parathyroid gland

Official coding rules

Published by CDC for FY2027. A rule attached to a category binds every code beneath it, so the rules inherited from this code's ancestors are shown with the code they come from.

This code

Excludes1 - never coded here

  • adult osteomalacia (M83.-)
  • ectopic hyperparathyroidism (E34.2)
  • hungry bone syndrome (E83.81)
  • infantile and juvenile osteomalacia (E55.0)

Excludes2 - not included here

  • familial hypocalciuric hypercalcemia (E83.52)

Inherited from the E20-E35 section Disorders of other endocrine glands (E20-E35)

Excludes1 - never coded here

  • galactorrhea (N64.3)
  • gynecomastia (N62)