E03.2

Hypothyroidism due to medicaments and other exogenous substances

FY2027Chapter 4: Endocrine, nutritional and metabolic diseases/E00–E07 Disorders of thyroid gland

BillableComplete code, valid to report

Code first
Use additional code
Excludes1

Care settingsHome Health Primary · MMTA - Endocrine

E03.2 (also written E032) is a billable ICD-10-CM diagnosis code for hypothyroidism due to medicaments and other exogenous substances. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 8 codes in category E03 (Other hypothyroidism). The Alphabetic Index lists it under 8 entries. Its coding notes include a Code first instruction, a Use additional code instruction and 3 Excludes1 entries.

Code first

If the underlying condition listed here is present and known, sequence it first.

This code

poisoning due to drug or toxin, if applicable (T36-T65 with fifth or sixth character 1-4)

Use additional code

Add the listed code as a secondary code, if known.

This code

code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)

Excludes1

Not coded here. The listed conditions generally should not be reported together.

Inherited from E03 Other hypothyroidism

iodine-deficiency related hypothyroidism (E00-E02)
postprocedural hypothyroidism (E89.0)

Also from chapter/block level (1 note)

Inherited from Chapter 4 Endocrine, nutritional and metabolic diseases

transitory endocrine and metabolic disorders specific to newborn (P70-P74)

Care settings

How CMS programs treat this code. These are CMS claim edits and list entries, not coverage or eligibility rules.

Home Health Primary

Accepted as the primary (principal) diagnosis on a home health claim. The Home Health Grouper assigns it to the MMTA - Endocrine clinical group.

Source: CMS Home Health Grouper Software v07.2.26, effective October 1, 2026

Notes

Also from chapter/block level (1 note)

Inherited from Chapter 4 Endocrine, nutritional and metabolic diseases

All neoplasms, whether functionally active or not, are classified in Chapter 2. Appropriate codes in this chapter (i.e. E05.8, E07.0, E16-E31, E34.-) may be used 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.

Alphabetic Index terms

Terms the official Alphabetic Index lists for this code. 8 entries