Valid for Submission
E21.1 is a billable diagnosis code used to specify a medical diagnosis of secondary hyperparathyroidism, not elsewhere classified. The code E21.1 is valid during the fiscal year 2021 from October 01, 2020 through September 30, 2021 for the submission of HIPAA-covered transactions.
The ICD-10-CM code E21.1 might also be used to specify conditions or terms like hyperparathyroidism due to intestinal malabsorption, hyperparathyroidism due to lithium therapy, hyperparathyroidism due to vitamin d deficiency, secondary hyperparathyroidism, secondary hyperparathyroidism , secondary hyperparathyroidism of nonrenal origin, etc.
Tabular List of Diseases and Injuries
The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code E21.1:
Type 1 ExcludesType 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
- secondary hyperparathyroidism of renal origin N25.81
Index to Diseases and Injuries
The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for the code E21.1 are found in the index:
The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:
- Hyperparathyroidism due to intestinal malabsorption
- Hyperparathyroidism due to lithium therapy
- Hyperparathyroidism due to vitamin D deficiency
- Secondary hyperparathyroidism
- Secondary hyperparathyroidism
- Secondary hyperparathyroidism of nonrenal origin
Diagnostic Related Groups - MS-DRG Mapping
Convert E21.1 to ICD-9 Code
Information for Patients
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
- Calcium - ionized (Medical Encyclopedia)
- Calcium - urine (Medical Encyclopedia)
- Calcium blood test (Medical Encyclopedia)
- Hypercalcemia - discharge (Medical Encyclopedia)
- Hyperparathyroidism (Medical Encyclopedia)
- Hypoparathyroidism (Medical Encyclopedia)
- Parathyroid adenoma (Medical Encyclopedia)
- Parathyroid biopsy (Medical Encyclopedia)
- Parathyroid cancer (Medical Encyclopedia)
- Parathyroid gland removal (Medical Encyclopedia)
- Parathyroid hormone (PTH) blood test (Medical Encyclopedia)
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