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E20.9

E20.9: Hypoparathyroidism, unspecified

Billable / specific codeICD-10-CM

E20.9 is a billable, specific ICD-10-CM code for hypoparathyroidism, unspecified. It is valid for submission on a claim.

Check E20.9 with the rest of the claim: free scrubber

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

  • Parathyroid tetany

Excludes1 inherited from the categories above E20.9

A category’s note binds every code beneath it.

Written on E20: Hypoparathyroidism

  • Di George's syndrome (D82.1)
  • postprocedural hypoparathyroidism (E89.2)
  • tetany NOS (R29.0)
  • transitory neonatal hypoparathyroidism (P71.4)

Other codes that can never be billed with E20.9

Their own Excludes1 notes name this code, so the conflict is not listed above.

Risk adjustment

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

Medicare coverage

E20.9 is named in 9 Medicare coverage policies: 9 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

  • A56416Billing and Coding: Assays for Vitamins and Metabolic Function
  • A56798Billing and Coding: Vitamin D Assay Testing
  • A56841Billing and Coding: Vitamin D; 25 hydroxy, includes fraction(s), if performed
  • A57122Billing and Coding: Parathormone (Parathyroid Hormone)

Alphabetic index entries that lead here

  • Hypoparathyroidism
  • Parathyroid tetany
  • Deficiency, deficient›parathyroid(gland)
  • Insufficiency, insufficient›parathyroid(gland)
  • Tetany›parathyroid(gland)
  • Cataract›in›hypoparathyroidism
  • Myopathy›in›hypoparathyroidism

Code history

Unchanged in every release from FY2024 to FY2027.

Other codes under E20

ICD-10-CMFY2027· effective October 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release: see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.