ICD-10 Code for Hyperthyroidism
Also indexed as (latent) (pre-adult) (recurrent)
The ICD-10-CM code for hyperthyroidism is E05.90 — Thyrotoxicosis, unspecified without thyrotoxic crisis or storm. This is the code the Alphabetic Index gives for hyperthyroidism with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
E05.90 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.
Which hyperthyroidism code should you use?
The Alphabetic Index lists 13 codes under Hyperthyroidism. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
Hyperthyroidism with
| goiter | E05.00 | Thyrotoxicosis with diffuse goiter without thyrotoxic crisis or storm | |
| storm | E05.91 | Thyrotoxicosis, unspecified with thyrotoxic crisis or storm | |
| goiter › with thyroid storm | E05.01 | Thyrotoxicosis with diffuse goiter with thyrotoxic crisis or storm | |
| goiter › nodular | E05.20 | Thyrotoxicosis with toxic multinodular goiter without thyrotoxic crisis or storm | |
| goiter › nodular › with thyroid storm | E05.21 | Thyrotoxicosis with toxic multinodular goiter with thyrotoxic crisis or storm | |
| goiter › nodular › uninodular | E05.10 | Thyrotoxicosis with toxic single thyroid nodule without thyrotoxic crisis or storm | |
| goiter › nodular › uninodular › with thyroid storm | E05.11 | Thyrotoxicosis with toxic single thyroid nodule with thyrotoxic crisis or storm |
Hyperthyroidism due to ectopic thyroid tissue
| with thyroid storm | E05.31 | Thyrotoxicosis from ectopic thyroid tissue with thyrotoxic crisis or storm |
Hyperthyroidism specified NEC
| with thyroid storm | E05.81 | Other thyrotoxicosis with thyrotoxic crisis or storm |
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources