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B33.0 ICD-10-CM Code: Epidemic myalgia

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

Coding at a Glance

Official instructions
1 inclusion term

What these terms mean →

Billable · FY2027A valid, specific ICD-10-CM code, reportable for dates of service in FY2027.

What you need to know

Source: CMS/NCHS Official ICD-10-CM tabular notes, quoted. From the CMS/NCHS tabular list for the release in force. A note the category or block publishes applies to this code too, and is marked with where it comes from.

IncludesWhat this code covers
  • Bornholm disease

Where it sits Source: CMS/NCHS

Under:Chapter 1: Certain Infectious and Parasitic DiseasesB25-B34 Other viral diseasesB33 Other viral diseases, not elsewhere classified

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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 v44, Appendix B.

  • MS-DRG 193 — SIMPLE PNEUMONIA AND PLEURISY WITH MCC (MDC 04)
  • MS-DRG 194 — SIMPLE PNEUMONIA AND PLEURISY WITH CC (MDC 04)
  • MS-DRG 195 — SIMPLE PNEUMONIA AND PLEURISY WITHOUT CC/MCC (MDC 04)

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 B33.0 in the official ICD-10-CM tabular list, quoted as published.

Source: CMS/CDC — ICD-10-CM Tabular ListRelease: FY2027Effective: October 1, 2026

Trace:FY2027 changesChange historyRelease, file and checksum

Inclusion Terms

Alternative terms the tabular list files under this code.

  • Bornholm disease

Coding context

Guidelines, coding notes, decision aids, relationships (with MS-DRG and CCSR classification), hierarchy, HCC, coverage and the context map: what a coder reaches for after the core. Each section names whether it is official source data, a MedCoder-derived relationship or MedCoder editorial.

Code Overview

Epidemic myalgia is a billable ICD-10-CM diagnosis code (B33.0).

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

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-derived relationships — computed from published CMS and AHRQ datasets

Other codes that name B33.0 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 2 Excludes1 notes: R07 — Pain in throat and chest, R07.81 — Pleurodynia.

These codes’ tabular lists mark this diagnosis as mutually exclusive — not reported together unless the conditions are documented as unrelated.

Referenced by 1 Code First instruction: H67 — Otitis media in diseases classified elsewhere (via B33.-).

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.

MS-DRG Grouper Relationships (FY2027)

Potential MS-DRG participation — not a DRG assignment.

FY2027 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 193 (MDC 04), DRG 194 (MDC 04), DRG 195 (MDC 04).

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

Clinical classification (AHRQ CCSR):INF008 — Viral infection (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 (Viral infection).

+309 more

Same Index main term, other category

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

A08.39 — Other viral enteritis (enteritis), A18.09 — Other musculoskeletal tuberculosis (in, tuberculosis), A30.9 — Leprosy, unspecified (in, leprosy), A48.0 — Gas gangrene (clostridial), A51.49 — Other secondary syphilitic conditions (in, syphilis, secondary), A52.78 — Syphilis of other musculoskeletal tissue (in, syphilis, late), A87.0 — Enteroviral meningitis (meningitis), A88.8 — Other specified viral infections of central nervous system (central nervous system NEC), B08.5 — Enteroviral vesicular pharyngitis (pharyngitis), B34.1 — Enterovirus infection, unspecified, B49 — Unspecified mycosis (mycotic), B58.82 — Toxoplasma myositis (in, toxoplasmosis), B65.9 — Schistosomiasis, unspecified (in, bilharziasis), B69.81 — Myositis in cysticercosis (in, cysticercosis), B75 — Trichinellosis (in, trichinellosis), B97.11 — Coxsackievirus as the cause of diseases classified elsewhere (as cause of disease classified elsewhere), D69.2 — Other nonthrombocytopenic purpura (pinches), D86.87 — Sarcoid myositis (in, sarcoidosis), F44.4 — Conversion disorder with motor symptom or deficit (hysterical), F45.8 — Other somatoform disorders (psychogenic), +128 more

Contextual Map

Every relationship of B33.0 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.

Run B33.0 with these 3 related codes in Claim Check

Hierarchy

Referenced by Excludes1 notes

  • R07 — Pain in throat and chest[Excludes1]: “epidemic myalgia (B33.0)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027
  • R07.81 — Pleurodynia[Excludes1]: “epidemic pleurodynia (B33.0)”— CMS ICD-10-CM tabular instructional notes · icd10cm-fy2027

Referenced by Code First instructions

Clinical classification (CCSR)

MS-DRG Grouper

MDC crossing

  • MDC 04 — Diseases and Disorders of the Respiratory System[MDC crossing]: “Diseases and Disorders of the Respiratory System — 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. 4,000 same-MDC procedures group here; browse them on the MDC page.”— CMS MS-DRG Definitions Manual · FY2027

Index entries (19)

  • Bornholm disease[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027
  • Coxsackie (virus) (infection), pleurodynia[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027
  • Daae (-Finsen) disease (epidemic pleurodynia)[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027
  • Dabney's grip[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027
  • Devil's, grip[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027
  • Disease, diseased, Bornholm (epidemic pleurodynia)[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027
  • Disease, diseased, Daae (-Finsen) (epidemic pleurodynia)[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027
  • Disease, diseased, Sylvest's (epidemic pleurodynia)[Index term]— CMS ICD-10-CM Index to Diseases and Injuries · icd10cm-fy2027
  • and 11 more

Nearest codes (11)

Change history

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

Reference

Index terms and tables, published questions and FAQ, every source behind this page with its release and checksum, the date-of-service check and the complete change history.

Indexed Clinical Terms (19)

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.

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 FY2027 tabular list, index and tables, effective October 1, 2026 Release, file and checksum · Publisher’s page
Claim edits Official source data
CMS Definitions of Medicare Code Edits — v44.0 (October 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 — v44 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-derived 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 editorial 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.

Current data releases:ICD-10-CM FY2027 · ICD-10-PCS FY2027 · HCPCS October 2026 · MS-DRG v44 · Medicare Code Editor v44.0 · NCCI PTP Q4 2026 · MUE Q4 2026 · NCD code lists 2026-01 · LCD export September 28, 2026 · All releases and sources

Labels on this page: Official source data · MedCoder-derived relationship · MedCoder editorial explanation. How to read the labels · All data sources and release dates · CMS coding rules

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. "B33.0 — Epidemic myalgia." ICD-10-CM FY2027. https://medcoder.ai/icd10/code/b33.0-epidemic-myalgia

Change history

  • FY2016 — October 1, 2015
    In the code set at ICD-10-CM adoption
    Epidemic myalgia

No changes since FY2016 — additions, deletions, description changes and billable-status changes are tracked through FY2027, 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 B33.0 in its code family, with their registry titles.

View all codes in the B33 family