ICD-10-CM Alphabetic Index · FY 2026 27 Entries
Hypothyroidism in the ICD-10-CM Index ICD-10-CM
The main term Hypothyroidism (acquired) carries 27 index entries pointing to 10 ICD-10-CM codes. The default entry is E03.9, the code the bare main term maps to; every indented line below refines the term by site, cause, or type. Verify any candidate code in the Tabular List before using it.
✓ Built from the official CMS FY 2026 index fileEffective Oct 1, 2025 – Sep 30, 2026
27
Index Entries
10
Codes Referenced
E03.9
Default Code
H
Letter
27 of 27 shown
ICD-10-CM
Index Entries Under Hypothyroidism 27 entries · 10 codes
Hypothyroidism (acquired) E03.9
autoimmune see Thyroiditis, autoimmune
congenital (without goiter) E03.1
with goiter (diffuse) E03.0
due to
exogenous substance NEC E03.2
iodine-deficiency, acquired E01.8
subclinical E02
irradiation therapy E89.0
medicament NEC E03.2
P-aminosalicylic acid (PAS) E03.2
phenylbutazone E03.2
resorcinol E03.2
sulfonamide E03.2
surgery E89.0
thiourea group drugs E03.2
iatrogenic NEC E03.2
iodine-deficiency (acquired) E01.8
congenital see Syndrome, iodine- deficiency, congenital
subclinical E02
neonatal, transitory P72.2
postinfectious E03.3
postirradiation E89.0
postprocedural E89.0
postsurgical E89.0
specified NEC E03.8
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Related Index Terms
Source: Centers for Medicare & Medicaid Services, FY 2026 ICD-10-CM Index to Diseases and Injuries release files, effective October 1, 2025 through September 30, 2026.
