E20.812 – Autoimmune hypoparathyroidism

ICD-10-CM 2027 diagnosis code · Disorders of other endocrine glands

Billable code

ICD-10-CM code E20.812

Code: E20.812 (claims format: E20812)
Description: Autoimmune hypoparathyroidism
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 4. Endocrine, nutritional and metabolic diseases (E00-E89)
Block: E20-E35 Disorders of other endocrine glands
Parent codes: E20 › E20.8 › E20.81

Notes for E20.812

Code first:

, if applicable, underlying condition such as:
autoimmune polyglandular failure (E31.0)
Schmidt's syndrome (E31.0)

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

E20 – Hypoparathyroidism

Excludes1 (not coded here):

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

Block E20-E35

Excludes1 (not coded here):

galactorrhea (N64.3)
gynecomastia (N62)

Index terms for E20.812

Entries in the ICD-10-CM alphabetic index that lead to this code:

Hypoparathyroidism, autoimmune

Related codes in E20.81

Frequently asked questions

What is ICD-10 code E20.812?

E20.812 is the ICD-10-CM code for autoimmune hypoparathyroidism, in the block E20-E35 (Disorders of other endocrine glands).

Is E20.812 a billable code?

Yes. E20.812 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does E20.812 belong to?

It belongs to category E20 – Hypoparathyroidism.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.