ICD-10-CM
ICD-10 code for Hyperthyroidism: E05.90
The ICD-10-CM index points "Hyperthyroidism" to E05.90, Thyrotoxicosis, unspecified without thyrotoxic crisis or storm. E05.90 is a billable code.
Source: CDC ICD-10-CM FY2027 Alphabetic Index file dated June 16, 2026. Publisher page
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Index subterms
A header groups codes and is not billed. A billable code is one you can report.
More specific codes in E05
A header groups codes and is not billed. A billable code is one you can report.
- E05Thyrotoxicosis [hyperthyroidism]Header
- E05.0Thyrotoxicosis with diffuse goiterHeader
- E05.00Thyrotoxicosis with diffuse goiter without thyrotoxic crisis or stormBillable
- E05.01Thyrotoxicosis with diffuse goiter with thyrotoxic crisis or stormBillable
- E05.1Thyrotoxicosis with toxic single thyroid noduleHeader
- E05.10Thyrotoxicosis with toxic single thyroid nodule without thyrotoxic crisis or stormBillable
- E05.11Thyrotoxicosis with toxic single thyroid nodule with thyrotoxic crisis or stormBillable
- E05.2Thyrotoxicosis with toxic multinodular goiterHeader
- E05.20Thyrotoxicosis with toxic multinodular goiter without thyrotoxic crisis or stormBillable
- E05.21Thyrotoxicosis with toxic multinodular goiter with thyrotoxic crisis or stormBillable
- E05.3Thyrotoxicosis from ectopic thyroid tissueHeader
- E05.30Thyrotoxicosis from ectopic thyroid tissue without thyrotoxic crisis or stormBillable
- E05.31Thyrotoxicosis from ectopic thyroid tissue with thyrotoxic crisis or stormBillable
- E05.4Thyrotoxicosis factitiaHeader
- E05.40Thyrotoxicosis factitia without thyrotoxic crisis or stormBillable
- E05.41Thyrotoxicosis factitia with thyrotoxic crisis or stormBillable
- E05.8Other thyrotoxicosisHeader
- E05.80Other thyrotoxicosis without thyrotoxic crisis or stormBillable
- E05.81Other thyrotoxicosis with thyrotoxic crisis or stormBillable
- E05.9Thyrotoxicosis, unspecifiedHeader
- E05.90Thyrotoxicosis, unspecified without thyrotoxic crisis or stormBillable
- E05.91Thyrotoxicosis, unspecified with thyrotoxic crisis or stormBillable
Excludes1
Excludes1 means these codes are not reported together.
From E05. A note on a category applies to every code under it.
Related conditions
Related pages
- E05.90 code detailsNotes, nearby codes, CMS-HCC group
- Category E05Every code under it
- Chapter 4Endocrine, nutritional and metabolic diseases
- ICD-10 codes by conditionA to Z
- Check a list of ICD-10 codes
- Denial code CO-11Diagnosis does not support the procedure
- Denial code CO-146Diagnosis invalid for the date of service
- HCPCS Level II code lookup
Questions
What is the ICD-10 code for Hyperthyroidism?
The ICD-10-CM index points "Hyperthyroidism" to E05.90, Thyrotoxicosis, unspecified without thyrotoxic crisis or storm. E05.90 is a billable code.
Is E05.90 billable?
Yes. E05.90 is a billable code in the FY2027 ICD-10-CM file. Use a more specific code when the record documents one.
What documentation notes apply to E05.90?
The CDC tabular list gives 2 Excludes1 notes (not coded together) for E05.90 and the categories above it. They are listed on this page.
What chapter is E05.90 in?
Chapter 4. Endocrine, nutritional and metabolic diseases.
When do ICD-10-CM codes change?
Every October 1, with the new fiscal year file. Some years add April 1 updates. This page uses the FY2027 file, effective October 1, 2026.