Is ICD-10-CM code E00 billable?

No, E00 (Congenital iodine-deficiency syndrome) is a non-billable ICD-10-CM code. It must be coded to a more specific subcategory before it can be used for reimbursement.

What chapter does ICD-10-CM code E00 belong to?

E00 belongs to Chapter 4 of the ICD-10-CM tabular list: E00–E89 (Endocrine, Nutritional and Metabolic Diseases).

E00Not billable, use a more specific code below

Congenital iodine-deficiency syndrome

In Disorders of thyroid gland (E00-E07), chapter 4: Endocrine, Nutritional and Metabolic Diseases

4 billable codes under E00: none are a CC or MCC; none map to an HCC.

Instructional notes

Excludes1: not coded here, use a different code

subclinical iodine-deficiency hypothyroidism (E02)

Use additional code: add a second code for this, listed after this one

code (F70-F79) to identify associated intellectual disabilities.

Official coding guidelines

From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.

Covers diabetes mellitus coding, including type, insulin and drug use, pump malfunction and secondary diabetes, plus obesity and obesity class codes.

Diabetes mellitus (page 39)
Obesity (page 42)

Read Section I.C.4 (page 39)

All codes under E00

E00 can't be used on a claim. Pick a billable code below; grey headings group them.

E00 MS-DRGs

As the principal diagnosis, all 4 billable codes under E00 group to MS-DRG 643, 644, or 645 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.

Other codes that refer to E00

Notes on these codes point to E00.

CH10 Excludes2: endocrine, nutritional and metabolic diseases (E00-E88)
CH11 Excludes2: endocrine, nutritional and metabolic diseases (E00-E88)
CH12 Excludes2: endocrine, nutritional and metabolic diseases (E00-E88)
CH13 Excludes2: endocrine, nutritional and metabolic diseases (E00-E88)
CH14 Excludes2: endocrine, nutritional and metabolic diseases (E00-E88)
CH16 Excludes2: endocrine, nutritional and metabolic diseases (E00-E88)
CH3 Excludes2: endocrine, nutritional and metabolic diseases (E00-E88)
CH6 Excludes2: endocrine, nutritional and metabolic diseases (E00-E88)
CH7 Excludes2: endocrine, nutritional and metabolic diseases (E00-E88)
CH8 Excludes2: endocrine, nutritional and metabolic diseases (E00-E88)
CH9 Excludes2: endocrine, nutritional and metabolic diseases (E00-E88)
E01 Excludes1: congenital iodine-deficiency syndrome (E00.-)
E03 Excludes1: iodine-deficiency related hypothyroidism (E00-E02)
E04 Excludes1: iodine-deficiency related goiter (E00-E02)
E61 Excludes1: iodine deficiency related thyroid disorders (E00-E02)
F02 Code First: hypothyroidism, acquired (E00-E03.-)
G63 Code First: endocrine disease, except diabetes (E00-E07, E15-E16, E20-E34)
I27.29 Code Also: hypothyroidism (E00-E03)
M14.8 Code First: hypothyroidism (E00-E03)
O99.2 Includes: Conditions in E00-E89

About the condition

Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.

Thyroid Diseases

Your thyroid is a small, butterfly-shaped gland in the front of your neck. It makes hormones that control the way the body uses energy. These hormones affect nearly every organ in your body and control many of your body's most important functions. For example, they affect your breathing, heart rate, weight, digestion, and moods.

Code history

Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.