E21 ICD 10 Code is a non-billable and non-specific code and should not be used to indicate a diagnosis for reimbursement purposes. There are other codes below it with greater level of diagnosis detail. The 2023 edition of the American ICD-10-CM code became effective on October 1, 2022.

Type 1 excludes for E21 ICD 10 code
  • adult osteomalacia (M83.-)
  • ectopic hyperparathyroidism (E34.2)
  • familial hypocalciuric hypercalcemia (E83.52)
  • hungry bone syndrome (E83.81)
  • infantile and juvenile osteomalacia (E55.0)

Codes
Possible back-references that may be applicable or related to E21 ICD10 Code:

Present On Admission (POA Exempt)

E21 ICD 10 code is considered exempt from POA reporting

Clinical information about E21 ICD 10 code

Most people have four pea-sized glands, called parathyroid glands, on the thyroid gland in the neck. Though their names are similar, the thyroid and parathyroid glands are completely different. The parathyroid glands make parathyroid hormone (PTH), which helps your body keep the right balance of calcium and phosphorous.

If your parathyroid glands make too much or too little hormone, it disrupts this balance. If they secrete extra PTH, you have hyperparathyroidism, and your blood calcium rises. In many cases, a benign tumor on a parathyroid gland makes it overactive. Or, the extra hormones can come from enlarged parathyroid glands. Very rarely, the cause is cancer.

If you do not have enough PTH, you have hypoparathyroidism. Your blood will have too little calcium and too much phosphorous. Causes include injury to the glands, endocrine disorders, or genetic conditions. Treatment is aimed at restoring the balance of calcium and phosphorous.

NIH: National Institute of Diabetes and Digestive and Kidney Diseases

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