Is E20.0 a billable ICD-10-CM code?

Yes. E20.0 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does E20.0 sit in the tabular list?

Endocrine, nutritional and metabolic diseases (E00-E89), in the block Disorders of other endocrine glands (E20-E35).

What cannot be coded together with E20.0?

E20.0 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above E20.0 (E20) and apply to it just the same.

E20.0

E20.0 — Idiopathic hypoparathyroidism

Billable / specific codeICD-10-CM

E20.0 is a billable, specific ICD-10-CM code for idiopathic hypoparathyroidism. It is valid for submission on a claim.

Excludes1 inherited from the categories above E20.0

These are not written on E20.0, but they bind it: a note on a category applies to every code beneath it. Billing E20.0 with anything listed here is a denial.

Written on E20 — Hypoparathyroidism

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

Risk adjustment

E20.0 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

E20.0 is named in 13 Medicare coverage policies — 13 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

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)

How E20.0 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to E20.0.

Hypoparathyroidism›idiopathic

Code history

E20.0 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share E20. If E20.0 is not quite right, the correct code is usually one of these.

Questions about E20.0

Is E20.0 a billable ICD-10-CM code?: Yes. E20.0 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does E20.0 sit in the tabular list?: Endocrine, nutritional and metabolic diseases (E00-E89), in the block Disorders of other endocrine glands (E20-E35).
What cannot be coded together with E20.0?: E20.0 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above E20.0 (E20) and apply to it just the same.