E20.818 – Other specified hypoparathyroidism due to impaired parathyroid hormone secretion

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

Billable code

ICD-10-CM code E20.818

Code: E20.818 (claims format: E20818)
Description: Other specified hypoparathyroidism due to impaired parathyroid hormone secretion
Short description: Oth hypoparathyroidism due to impaired PTH secretion
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 E20.818

Applicable to:

Familial isolated hypoparathyroidism

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 E20.818

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

Related codes in E20.81

Frequently asked questions

What is ICD-10 code E20.818?

E20.818 is the ICD-10-CM code for other specified hypoparathyroidism due to impaired parathyroid hormone secretion, in the block E20-E35 (Disorders of other endocrine glands).

Is E20.818 a billable code?

Yes. E20.818 is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does E20.818 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.