ICD-10-CM 2027 diagnosis code

E01Iodine-deficiency related thyroid disorders and allied conditions

Not billable — use a more specific code

E01 is a header code, so it can't be reported by itself. Choose one of the 4 more specific codes beneath it.Short description: Iodine-deficiency related thyroid disorders and allied cond

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About E01

E01 is the ICD-10-CM diagnosis code for iodine-deficiency related thyroid disorders and allied conditions. It belongs to block E00-E07 (disorders of thyroid gland) and chapter 4 (endocrine, nutritional and metabolic diseases). It is a header code, so it can't be reported by itself; one of its 4 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: E01.0 (goiter), E01.1 (goiter), E01.2 (unspecified) and E01.8 (conditions).

Don't report E01 together with the conditions in its Excludes1 note: congenital iodine-deficiency syndrome (E00.-) and subclinical iodine-deficiency hypothyroidism (E02).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under E01

Coding notes

Excludes1Not coded here — never report together with this code

congenital iodine-deficiency syndrome (E00.-)
subclinical iodine-deficiency hypothyroidism (E02)

Notes that apply from higher levels

Instructions written at a parent level also apply to E01.

Broader instructions also apply from Chapter 4: Endocrine, nutritional and metabolic diseases.

Code history

2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about E01

Is E01 billable?: No. E01 is a header code. Report one of its more specific subcodes instead.