E00.9 Congenital iodine-deficiency syndrome, unspecified

The ICD-10-CM code for Congenital iodine-deficiency syndrome, unspecified is E00.9 (FY2026). It is a billable, claim-ready diagnosis code.

Classification

Chapter

4: Endocrine, nutritional and metabolic diseases (E00-E89)

Section

E00-E07: Disorders of thyroid gland (E00-E07)

Category E00

5 codes (4 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to E00.9:

• Cretin, cretinism (congenital) (endemic) (nongoitrous) (sporadic)
• Syndrome › iodine-deficiency, congenital
• Myopathy › in (due to) › cretinism

Inclusion Terms

• Congenital iodine-deficiency hypothyroidism NOS
• Endemic cretinism NOS

U.S. Hospital Utilization

• An estimated 55 U.S. inpatient stays in 2021 included E00.9 among the documented diagnoses.

Source: National Inpatient Sample (NIS), Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality, 2016–2023. National survey-weighted estimates.

Official Coding Guidelines

Chapter 4 TOC entry

4. Chapter 4: Endocrine, Nutritional, and Metabolic Diseases (E00-E89) ................................. 39

Diabetes mellitus (TOC entry)

a. Diabetes mellitus ................................................................................................................... 39

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool
• AHRQ — HCUP National Inpatient Sample, Frequencies by Diagnosis Code (2016–2023)