E03 ICD-10-CA category: Other hypothyroidism
E03 isn’t a code on its own. Choose one of the 8 codes beneath it, the one the documentation supports.
Official description
E03Other hypothyroidism
ICD-10-CA · Canada
Codes in E03
E03 isn’t a code on its own. Open the code that matches what the note documents.
E03.0Congenital hypothyroidism with diffuse goitreE03.1Congenital hypothyroidism without goitreE03.2Hypothyroidism due to medicaments and other exogenous substancesE03.3Postinfectious hypothyroidismE03.4Atrophy of thyroid (acquired)E03.5Myxoedema comaE03.8Other specified hypothyroidismE03.9Hypothyroidism, unspecifiedNotes for E03
As CIHI prints them, with any note E03 takes from the headings above it.
Excludes
Conditions classified elsewhere.
- Iodine-deficiency-related hypothyroidism (E00-E02)postprocedural hypothyroidism (E89.0)
- Complications of pregnancy, childbirth and the puerperium (O00-O99)symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)transitory endocrine and metabolic disorders specific to fetus and newborn (P70-P74)From Chapter 4: Endocrine, nutritional and metabolic diseases (E00-E90)
Note
- All neoplasms, whether functionally active or not, are classified in Chapter II. Appropriate codes in this chapter (i.e. E05.8)(E07.0) (E16-E31)(E34.-) may be used, if desired, as additional codes to indicate either functional activity by neoplasms and ectopic endocrine tissue or hyperfunction and hypofunction of endocrine glands associated with neoplasms and other conditions classified elsewhere.From Chapter 4: Endocrine, nutritional and metabolic diseases (E00-E90)
Where E03 sits
- 1ChapterChapter 4: Endocrine, nutritional and metabolic diseases (E00-E90)
- 2Block E00-E07Disorders of thyroid gland
- 3Category E03Other hypothyroidism
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
Is E03 a valid ICD-10-CA code?
No. E03 (Other hypothyroidism) is a category heading in CIHI’s ICD-10-CA FY 2026–2027 release. It holds 8 codes; record the one the documentation supports.
Where is E03 in ICD-10-CA?
E03 sits under E00-E07 Disorders of thyroid gland, within Chapter 4: Endocrine, nutritional and metabolic diseases (E00-E90).
What coding notes apply to E03?
ICD-10-CA lists Excludes, Note notes for E03, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.