A26.0 ICD-10-CM Code: Cutaneous erysipeloid

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for A26.0 in the official ICD-10-CM tabular list, quoted as published.

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

Indexed Clinical Terms (4)

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.

• Eruption, skin (nonspecific), erysipeloid
• Erysipeloid, cutaneous (Rosenbach's)
• Erythema, erythematous (infectional) (inflammation), migrans
• Rosenbach's erysipeloid

Don’t confuse A26.0 with…

MedCoder analysis — pairs from this code’s official notes, distinctions written by MedCoder

The codes most likely to be picked instead of A26.0 — named in its own official notes, or sharing its laterality or encounter family — with what separates them and which documentation moves the case. Each links to the full comparison.

• A26.9— Specificity relationship (Review)

  Overlapping diagnoses in the same category.

  Overlapping codes in the same category — the documentation decides which is the more specific fit.

  What moves you there: A record that documents no more than “Erysipeloid, unspecified” takes A26.9; specificity in the record moves it back here.

  Full comparison: A26.0 vs A26.9 →

Relationships are read from this code's own official notes, its laterality siblings and its encounter family; the wording of each distinction is MedCoder editorial, and the documentation named in each “what moves you there” line is the official note phrase or sibling title itself. Source: CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a.

Verify Before Coding

• No Medicare Code Editor or MS-DRG Definitions Manual restrictions apply to this code.

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

MS-DRG Grouper Relationships (FY2026)

Potential MS-DRG participation — not a DRG assignment.

FY2026 MS-DRG: not on the CMS CC/MCC list — as a secondary diagnosis this code does not change MS-DRG severity for that release.

Named in the grouper logic of 3 MS-DRGs: DRG 867 (MDC 18), DRG 868 (MDC 18), DRG 869 (MDC 18).

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

Clinical classification (AHRQ CCSR):INF003 — Bacterial infections (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 category (CCSR)

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

+399 more

Same Index main term, other category

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

A18.4 — Tuberculosis of skin and subcutaneous tissue (tuberculous), A25.1 — Streptobacillosis (epidemic, arthritic), A69.20 — Lyme disease, unspecified (chronicum migrans), B00.0 — Eczema herpeticum (Kaposi's varicelliform), B08.3 — Erythema infectiosum [fifth disease] (infectiosum), B76.9 — Hookworm disease, unspecified (creeping), E52 — Niacin deficiency [pellagra] (endemic), I00 — Rheumatic fever without heart involvement (marginatum, inacute rheumatic fever), K00.6 — Disturbances in tooth eruption (tooth, teeth, abnormal), K14.1 — Geographic tongue (migrans, tongue), L12.0 — Bullous pemphigoid (multiforme, pemphigoides), L13.8 — Other specified bullous disorders (recalcitrant pustular), L22 — Diaper dermatitis (napkin), L24.5 — Irritant contact dermatitis due to other chemical products (due to, chemical NEC, in contact with skin), L27.0 — Generalized skin eruption due to drugs and medicaments taken internally (drug), L27.1 — Localized skin eruption due to drugs and medicaments taken internally (drug, fixed), L28.0 — Lichen simplex chronicus (skin, lichenoid), L30.4 — Erythema intertrigo (intertrigo), L51.0 — Nonbullous erythema multiforme (multiforme, nonbullous), L51.1 — Stevens-Johnson syndrome (multiforme, conjunctiva), +21 more

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.

Gamma-glutamyl Transferase (GGT) Test

Contextual Map

Every relationship of A26.0 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.

Hierarchy

• A00-B99 — Chapter 1: Certain Infectious and Parasitic Diseases (A00-B99) (A00-B99)[Hierarchy]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• A20-A28 — Certain zoonotic bacterial diseases[Hierarchy]— CMS ICD-10-CM tabular structure · icd10cm-fy2026

Clinical classification (CCSR)

• INF003 — Bacterial infections[CCSR]— AHRQ CCSR for ICD-10-CM Diagnoses (HCUP)

MS-DRG Grouper

• DRG 867 — OTHER INFECTIOUS AND PARASITIC DISEASES DIAGNOSES WITH MCC[MS-DRG]: “OTHER INFECTIOUS AND PARASITIC DISEASES DIAGNOSES WITH MCC (MDC 18)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026
• DRG 868 — OTHER INFECTIOUS AND PARASITIC DISEASES DIAGNOSES WITH CC[MS-DRG]: “OTHER INFECTIOUS AND PARASITIC DISEASES DIAGNOSES WITH CC (MDC 18)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026
• DRG 869 — OTHER INFECTIOUS AND PARASITIC DISEASES DIAGNOSES WITHOUT CC/MCC[MS-DRG]: “OTHER INFECTIOUS AND PARASITIC DISEASES DIAGNOSES WITHOUT CC/MCC (MDC 18)”— CMS MS-DRG Definitions Manual (Appendix B) · FY2026

MDC crossing

• MDC 18 — Infectious and Parasitic Diseases, Systemic or Unspecified Sites[MDC crossing]: “Infectious and Parasitic Diseases, Systemic or Unspecified Sites — 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. 1 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2026

Index entries

• Eruption, skin (nonspecific), erysipeloid[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• Erysipeloid, cutaneous (Rosenbach's)[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• Erythema, erythematous (infectional) (inflammation), migrans[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026
• Rosenbach's erysipeloid[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2026

Nearest codes

• A26 — Erysipeloid[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• A26.7 — Erysipelothrix sepsis[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• A26.8 — Other forms of erysipeloid[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026
• A26.9 — Erysipeloid, unspecified[Sibling]— CMS ICD-10-CM tabular structure · icd10cm-fy2026

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

Nearest Codes in This Family

Official ICD-10-CM classifications closest to A26.0 in its code family, with their registry titles.

• A26 — Erysipeloid
• A26.7 — Erysipelothrix sepsis
• A26.8 — Other forms of erysipeloid
• A26.9 — Erysipeloid, unspecified

View all codes in the A26 family