E21.5

E21.5: Disorder of parathyroid gland, unspecified

Billable / specific codeICD-10-CM

E21.5 is a billable, specific ICD-10-CM code for disorder of parathyroid gland, unspecified. It is valid for submission on a claim.

Check E21.5 with the rest of the claim: free scrubber

Excludes1 inherited from the categories above E21.5

A category’s note binds every code beneath it.

Written on E21: Hyperparathyroidism and other disorders of parathyroid gland

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

Excludes2 inherited from the categories above E21.5

Not part of this code, but both may be coded when both are present.

Written on E21: Hyperparathyroidism and other disorders of parathyroid gland

familial hypocalciuric hypercalcemia (E83.52)

Risk adjustment

No CMS-HCC V28 category: this code does not change a RAF score.

Medicare coverage

E21.5 is named in 2 Medicare coverage policies: 2 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

A57361Billing and Coding: Monitored Anesthesia Care
A57484Billing and Coding: Vitamin D Assay Testing

Alphabetic index entries that lead here

Disease, diseased›parathyroid(gland)
Disorder›parathyroid(gland)

Code history

Unchanged in every release from FY2024 to FY2027.