October 1 update. Our PDGM and ICD-10 tools now use the FY2027 code set: 190 codes added, 30 deleted, and no existing code changed clinical group.

See what changed

ICD-10 · PDGM grouping

E05 Thyrotoxicosis [hyperthyroidism]

All 14 codes in the E05 family, with the PDGM clinical group, comorbidity subgroup and primary-position rule CMS assigns, read from the CMS grouper crosswalk v07.2.26 and the CDC FY2027 code file.

ICD-10-CM FY2027 · CMS grouper v07.2.26

Codes in family

14

Can lead a claim

14

Cannot lead a claim

0

What CMS assigns to E05

All 14 codes group to MMTA - Endocrine. None of the 14 is assigned a comorbidity subgroup. Every code can lead a claim.

Every code in E05

Descriptions are CDC’s FY2027 wording; where CMS’s grouper abbreviates one, its form is shown beneath.

CodeDescriptionPrimary positionClinical groupComorbidity subgroup
E05.0 Thyrotoxicosis with diffuse goiter
E05.00Thyrotoxicosis with diffuse goiter without thyrotoxic crisis or stormCMS: Thyrotoxicosis w diffuse goiter w/o thyrotoxic crisisCan lead a claimINone
E05.01Thyrotoxicosis with diffuse goiter with thyrotoxic crisis or stormCMS: Thyrotoxicosis w diffuse goiter w thyrotoxic crisis or stormCan lead a claimINone
E05.1 Thyrotoxicosis with toxic single thyroid nodule
E05.10Thyrotoxicosis with toxic single thyroid nodule without thyrotoxic crisis or stormCMS: Thyrotxcosis w toxic sing thyroid nodule w/o thyrotxc crisisCan lead a claimINone
E05.11Thyrotoxicosis with toxic single thyroid nodule with thyrotoxic crisis or stormCMS: Thyrotxcosis w toxic single thyroid nodule w thyrotxc crisisCan lead a claimINone
E05.2 Thyrotoxicosis with toxic multinodular goiter
E05.20Thyrotoxicosis with toxic multinodular goiter without thyrotoxic crisis or stormCMS: Thyrotxcosis w toxic multinod goiter w/o thyrotoxic crisisCan lead a claimINone
E05.21Thyrotoxicosis with toxic multinodular goiter with thyrotoxic crisis or stormCMS: Thyrotxcosis w toxic multinodular goiter w thyrotoxic crisisCan lead a claimINone
E05.3 Thyrotoxicosis from ectopic thyroid tissue
E05.30Thyrotoxicosis from ectopic thyroid tissue without thyrotoxic crisis or stormCMS: Thyrotxcosis from ectopic thyroid tissue w/o thyrotxc crisisCan lead a claimINone
E05.31Thyrotoxicosis from ectopic thyroid tissue with thyrotoxic crisis or stormCMS: Thyrotxcosis from ectopic thyroid tissue w thyrotoxic crisisCan lead a claimINone
E05.4 Thyrotoxicosis factitia
E05.40Thyrotoxicosis factitia without thyrotoxic crisis or stormCan lead a claimINone
E05.41Thyrotoxicosis factitia with thyrotoxic crisis or stormCan lead a claimINone
E05.8 Other thyrotoxicosis
E05.80Other thyrotoxicosis without thyrotoxic crisis or stormCan lead a claimINone
E05.81Other thyrotoxicosis with thyrotoxic crisis or stormCan lead a claimINone
E05.9 Thyrotoxicosis, unspecified
E05.90Thyrotoxicosis, unspecified without thyrotoxic crisis or stormCMS: Thyrotoxicosis, unsp without thyrotoxic crisis or stormCan lead a claimINone
E05.91Thyrotoxicosis, unspecified with thyrotoxic crisis or stormCan lead a claimINone

Sources: CMS HH PPS Grouper Software v07.2.26, effective 2026-10-01, for the clinical group, comorbidity subgroup, code-first conventions and primary-position flags; CDC NCHS ICD-10-CM FY2027 code descriptions for the family title and code wording. This is the crosswalk Medicare runs a claim through. Grouping also depends on admission source, timing, the OASIS functional items and the rest of the diagnosis list.

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