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E05.11 ICD-10-CM Code: Thyrotoxicosis with toxic single thyroid nodule with thyrotoxic crisis or storm

Billing Status: YES. This is a valid, specific, and billable ICD-10-CM reference.

Coding at a Glance

Tabular directives
2 Excludes1
Risk adjustment
RxHCC V08 category 44

Inpatient Payment Groups (MS-DRG)

Potential MS-DRG participation — not a DRG assignment.

MS-DRGs this diagnosis helps define, as principal or secondary, per the CMS ICD-10-CM/PCS MS-DRG Definitions Manual v43, Appendix B.

  • MS-DRG 011 — TRACHEOSTOMY FOR FACE, MOUTH AND NECK DIAGNOSES OR LARYNGECTOMY WITH MCC (MDC PRE)
  • MS-DRG 012 — TRACHEOSTOMY FOR FACE, MOUTH AND NECK DIAGNOSES OR LARYNGECTOMY WITH CC (MDC PRE)
  • MS-DRG 013 — TRACHEOSTOMY FOR FACE, MOUTH AND NECK DIAGNOSES OR LARYNGECTOMY WITHOUT CC/MCC (MDC PRE)
  • MS-DRG 643 — ENDOCRINE DISORDERS WITH MCC (MDC 10)
  • MS-DRG 644 — ENDOCRINE DISORDERS WITH CC (MDC 10)
  • MS-DRG 645 — ENDOCRINE DISORDERS WITHOUT CC/MCC (MDC 10)

A diagnosis appearing in a group's logic does not by itself determine the DRG assigned to a stay; the grouper uses the full claim.

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for E05.11 in the official ICD-10-CM tabular list, quoted as published.

Source: CMS/CDC — ICD-10-CM Tabular ListRelease: FY2026Effective: October 1, 2025

Notes without a marker are published on E05.11 itself; “inherited from” names the category or block whose note applies here.

Excludes1 — Not Coded Here

Conditions generally not reported together with this code (Excludes1) -- an error unless the two conditions are documented as unrelated to each other (ICD-10-CM Official Guidelines, Section I.A.12.a).

Source: inherited from E05

Coder workflow for E05.11

MedCoder structured workflow — derived from this code’s own official record

Before you code E05.11

  1. E05.11’s title joins a condition with an associated condition or complication. Confirm each component is documented. Where the classification presumes the link through the “with” convention, only a provider statement that the conditions are unrelated defeats it. A combination code is assigned only when it fully identifies the documented conditions; a required second code for the stage, type or manifestation is still reported when the notes ask for it (Guidelines I.B.9, I.A.15).

    Guide: Combination codes →

  2. Check the Excludes1 note: if the documentation supports a condition named there, do not simply proceed with E05.11. Excludes1 conditions are not reported together with this code unless the record shows they are unrelated (Guidelines I.A.12.a).

    See the official tabular notes

Choose the right path

  1. Does the documentation support a condition named in E05.11’s Excludes1 note?
    Yes → Do not simply proceed: review the excluded code. Both are reported only when the record shows the two conditions are unrelated.
    No → Continue.

    ReviewE06.2, P72.1

Consider E05.11. Then confirm the code is valid for the date of service in the Verify section.

Documentation check

The provider’s diagnostic statement
Codes are assigned from the provider’s documented diagnosis, not from clinical criteria, test values or a medication list (Guidelines I.A.19).
The associated condition or complication
Whether the associated condition the title names is documented; the “with” convention presumes some links, and a provider statement that the conditions are unrelated defeats it (Guidelines I.A.15).

Official instructions as workflow

  • Excludes1 — check before selecting E05.11(2 notes)

    Coding workflow: If the documentation supports a condition named in this note, do not simply proceed with E05.11: the two are not reported together. The one exception is when the record shows the two conditions are unrelated to each other.

    CompareE06.2, P72.1

    See the official tabular notes · Guidelines I.A.12.a

Coding decision scenarios

Pattern scenarios for this code’s structure — decision rules, not clinical cases

Documentation: Both the condition E05.11 describes and a condition named in its Excludes1 note are documented for the same encounter.

Coding question: Can both codes be reported?

Path: Review the Excludes1 note and the excluded code, and look for a provider statement on whether the two conditions are related.

Reason: Excludes1 means the two are not coded together; the exception is when the record shows the conditions are unrelated to each other (Guidelines I.A.12.a).

ReviewE06.2, P72.1

Documentation: Only one of the components this code’s title joins is documented.

Coding question: Is E05.11 supported?

Path: Review the code for the documented component on its own.

Reason: A combination code is assigned only when it fully identifies the documented conditions; otherwise the documented component takes its own code (Guidelines I.B.9).

Every row is derived from this code’s own record — its title, tabular notes, 7th-character family and same-category siblings — with fixed MedCoder wording; nothing is inferred about a patient. The official notes and guideline text are in the sections each row links to, and they control.

Code Overview

Thyrotoxicosis with toxic single thyroid nodule with thyrotoxic crisis or storm is a billable ICD-10-CM diagnosis code (E05.11).

MedCoder summary Summary composed by MedCoder from this code's official ICD-10-CM record. The tabular instructional notes themselves appear verbatim below.

Indexed Clinical Terms (7)

Official source data — entries quoted as published, in the Index’s own lookup phrasing

Clinical term phrases from the official ICD-10-CM Index to Diseases and Injuries that map to this code. These are alphabetic-index entries shown as the Index writes them — lookup phrasing, not necessarily the wording of a final diagnosis.

Verify Before Coding

  • MCC as a secondary diagnosis (FY2026). Can raise the stay's MS-DRG severity tier.

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim in Claim Check.

Relationships & Classification

MedCoder structured relationships — computed from published CMS and AHRQ datasets

Other codes that name E05.11 or its code family, from the CMS ICD-10-CM tabular instructional notes. Tabular-note edges are stored at the code family level that carries each note.

Referenced by 5 Code First instructions across 3 chapters: G63 — Polyneuropathy in diseases classified elsewhere (via E05.-), G73.3 — Myasthenic syndromes in other diseases classified elsewhere (via E05.-), G99.0 — Autonomic neuropathy in diseases classified elsewhere (via E05.-), I43 — Cardiomyopathy in diseases classified elsewhere (via E05.-), M14.8 — Arthropathies in other specified diseases classified elsewhere (via E05.-).

Each of these codes carries a Code First note naming this condition — when that code is reported, THIS code is sequenced first, ahead of it.

Referenced by 1 Code Also instruction: I27.29 — Other secondary pulmonary hypertension (via E05.-).

These codes suggest coding this condition alongside when both are present.

MS-DRG Grouper Relationships (FY2026)

Potential MS-DRG participation — not a DRG assignment.

FY2026 MS-DRG: MCC — Major Complication or Comorbidity. Reported as a secondary diagnosis, this code raises the stay's MS-DRG severity tier — except when the principal diagnosis is one of 59 clinically related codes on its CMS exclusion list.

Named in the grouper logic of 6 MS-DRGs: DRG 011 (MDC PRE), DRG 012 (MDC PRE), DRG 013 (MDC PRE), DRG 643 (MDC 10), DRG 644 (MDC 10), DRG 645 (MDC 10).

From the CMS MS-DRG Definitions Manual (Appendices B and C). Actual DRG assignment depends on the complete claim.

Clinical classification (AHRQ CCSR):END001 — Thyroid disorders (default).

Clinical Classifications Software Refined (CCSR) for ICD-10-CM Diagnoses. Healthcare Cost and Utilization Project (HCUP), Agency for Healthcare Research and Quality.

Related Codes

Same clinical process (MS-DRG)

Acts as MCC — raises the severity of other admissions. CMS groups these diagnoses into one MS-DRG principal-diagnosis exclusion process — a CC/MCC on this list never raises severity when the principal diagnosis is also on it.

E03.8 — Other specified hypothyroidism, E03.9 — Hypothyroidism, unspecified, E04.0 — Nontoxic diffuse goiter, E04.1 — Nontoxic single thyroid nodule, E04.2 — Nontoxic multinodular goiter, E04.8 — Other specified nontoxic goiter, E04.9 — Nontoxic goiter, unspecified, E05.00 — Thyrotoxicosis with diffuse goiter without thyrotoxic crisis or storm, E05.01 — Thyrotoxicosis with diffuse goiter with thyrotoxic crisis or storm, E05.10 — Thyrotoxicosis with toxic single thyroid nodule without thyrotoxic crisis or storm, E05.20 — Thyrotoxicosis with toxic multinodular goiter without thyrotoxic crisis or storm, E05.21 — Thyrotoxicosis with toxic multinodular goiter with thyrotoxic crisis or storm, E05.30 — Thyrotoxicosis from ectopic thyroid tissue without thyrotoxic crisis or storm, E05.31 — Thyrotoxicosis from ectopic thyroid tissue with thyrotoxic crisis or storm, E05.40 — Thyrotoxicosis factitia without thyrotoxic crisis or storm, E05.41 — Thyrotoxicosis factitia with thyrotoxic crisis or storm, E05.80 — Other thyrotoxicosis without thyrotoxic crisis or storm, E05.81 — Other thyrotoxicosis with thyrotoxic crisis or storm, E05.90 — Thyrotoxicosis, unspecified without thyrotoxic crisis or storm, E05.91 — Thyrotoxicosis, unspecified with thyrotoxic crisis or storm, +38 more

Same clinical category (CCSR)

AHRQ's Clinical Classifications Software groups these diagnoses under the same clinical category (Thyroid disorders).

E03.8 — Other specified hypothyroidism, E03.9 — Hypothyroidism, unspecified, E04.0 — Nontoxic diffuse goiter, E04.1 — Nontoxic single thyroid nodule, E04.2 — Nontoxic multinodular goiter, E04.8 — Other specified nontoxic goiter, E04.9 — Nontoxic goiter, unspecified, E05.00 — Thyrotoxicosis with diffuse goiter without thyrotoxic crisis or storm, E05.01 — Thyrotoxicosis with diffuse goiter with thyrotoxic crisis or storm, E05.10 — Thyrotoxicosis with toxic single thyroid nodule without thyrotoxic crisis or storm, E05.20 — Thyrotoxicosis with toxic multinodular goiter without thyrotoxic crisis or storm, E05.21 — Thyrotoxicosis with toxic multinodular goiter with thyrotoxic crisis or storm, E05.30 — Thyrotoxicosis from ectopic thyroid tissue without thyrotoxic crisis or storm, E05.31 — Thyrotoxicosis from ectopic thyroid tissue with thyrotoxic crisis or storm, E05.40 — Thyrotoxicosis factitia without thyrotoxic crisis or storm, E05.41 — Thyrotoxicosis factitia with thyrotoxic crisis or storm, E05.80 — Other thyrotoxicosis without thyrotoxic crisis or storm, E05.81 — Other thyrotoxicosis with thyrotoxic crisis or storm, E05.90 — Thyrotoxicosis, unspecified without thyrotoxic crisis or storm, E05.91 — Thyrotoxicosis, unspecified with thyrotoxic crisis or storm, +35 more

Same Index main term, other category

The ICD-10-CM Index to Diseases and Injuries files this code under the main terms “Thyrotoxicosis”, “Struma”, “Goiter”; these codes share that main term but sit in a different category of the Tabular List.

C73 — Malignant neoplasm of thyroid gland (cancerous), E01.0 — Iodine-deficiency related diffuse (endemic) goiter (endemic, diffuse), E01.1 — Iodine-deficiency related multinodular (endemic) goiter (nodular, endemic), E01.2 — Iodine-deficiency related (endemic) goiter, unspecified (endemic), E03.0 — Congenital hypothyroidism with diffuse goiter (congenital), E04.0 — Nontoxic diffuse goiter (simple), E04.1 — Nontoxic single thyroid nodule (uninodular), E04.2 — Nontoxic multinodular goiter (cystic), E04.8 — Other specified nontoxic goiter (nontoxic, specified NEC), E04.9 — Nontoxic goiter, unspecified, E06.2 — Chronic thyroiditis with transient thyrotoxicosis (transient with chronic thyroiditis), E06.3 — Autoimmune thyroiditis (Hashimoto), E06.5 — Other chronic thyroiditis (Riedel's), E07.1 — Dyshormogenetic goiter (dyshormonogenetic), P72.0 — Neonatal goiter, not elsewhere classified (neonatal NEC), P72.1 — Transitory neonatal hyperthyroidism (neonatal), Q89.2 — Congenital malformations of other endocrine glands (lingual)

Lab tests where this diagnosis supports Medicare coverage (NCD)

Medicare's National Coverage Determination (NCD) program lists this diagnosis as medical justification for these lab tests.

Blood Glucose Test, Lipid Panel, Thyroid Stimulating Hormone (TSH)

Contextual Map

Every relationship of E05.11 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Run E05.11 with these 6 related codes in Claim Check

Hierarchy

Referenced by Code First instructions

Referenced by Code Also instructions

Clinical classification (CCSR)

MS-DRG Grouper

MDC crossing

  • Pre-MDC[MDC crossing]: “Pre-MDC — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs. 153 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2026
  • MDC 10 — Endocrine, Nutritional and Metabolic Diseases and Disorders[MDC crossing]: “Endocrine, Nutritional and Metabolic Diseases and Disorders — the grouper's crossing between diagnoses and procedures: a principal diagnosis sets the MDC, and same-MDC procedures move the stay to its surgical DRGs. 5,008 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2026

Index entries

  • Goiter (plunging) (substernal), uninodular (nontoxic), toxic or with hyperthyroidism, with thyroid storm[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Hyperthyroidism (latent) (pre-adult) (recurrent), with, goiter (diffuse), nodular (multinodular), uninodular, with thyroid storm[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Struma, nodosa (simplex), toxic or with hyperthyroidism, uninodular, with thyroid storm[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Struma, nodosa (simplex), toxicosa, uninodular, with thyroid storm[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Thyrotoxicosis (recurrent), with, goiter (diffuse), adenomatous uninodular, with thyroid storm[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Thyrotoxicosis (recurrent), with, goiter (diffuse), uninodular, with thyroid storm[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
  • Thyrotoxicosis (recurrent), with, single thyroid nodule, with thyroid storm[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026

Nearest codes (21)

Change history

  • FY2016 — In the code set at ICD-10-CM adoption [Change history]— CMS release files (code change ledger) · icd10cm-fy2016

Sources for this page

Codes, titles, notes, index terms and mappings on this page are transcribed from the datasets below. Relationships MedCoder computed and text MedCoder wrote are labelled where they appear.

Code, title, tabular notes and index terms Official source data
CMS/CDC ICD-10-CM FY2026 tabular list, index and tables, effective October 1, 2025 Release, file and checksum · Publisher’s page
Claim edits Official source data
CMS Definitions of Medicare Code Edits — v43.1 (April 2026) Release, file and checksum · Publisher’s page
Inpatient payment groups Official source data
CMS MS-DRG Definitions Manual (incl. Appendix B diagnosis index, Appendix C CC/MCC list, Appendix E procedure index) and IPPS Final Rule tables — v43 Release, file and checksum · Publisher’s page
Change history and date-of-service validity Official source data
CMS ICD-10-CM release addenda, ingested release by release into the change ledger Release, file and checksum · Publisher’s page
Comparisons, relationships and the contextual map MedCoder structured relationship
Computed by MedCoder from the tabular notes and tables above; every derived relationship is marked as derived where it appears
Summary and FAQ answers MedCoder explanation
Written by MedCoder to explain the sources above: drafted with AI assistance, checked by a person against the release files, and labelled as MedCoder text where it appears. Not official text.

Labels on this page: Official source data · MedCoder structured relationship · MedCoder explanation. How to read the labels · All data sources and release dates

Cite this page

Reference this page in a research guide, syllabus or article. The release is included because code content changes each year.

MedCoder.ai. "E05.11 — Thyrotoxicosis with toxic single thyroid nodule with thyrotoxic crisis or storm." ICD-10-CM FY2026. https://medcoder.ai/icd10/code/e05.11-thyrotoxicosis-with-toxic-single-thyroid-nodule-with-thyrotoxic-crisis-or-storm

Change history

  • FY2016 — October 1, 2015
    In the code set at ICD-10-CM adoption
    Thyrotoxicosis with toxic single thyroid nodule with thyrotoxic crisis or storm

No changes since FY2016 — additions, deletions, description changes and billable-status changes are tracked through FY2027 (effective October 1, 2026), and none are recorded for this code. Note changes are tracked from FY2027 only.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to E05.11 in its code family, with their registry titles.

View all codes in the E05 family