DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

B33 Other viral diseases, not elsewhere classified

  • Header · not billable

B33 is not billable. The category heads 10 billable codes in FY2027, grouped under 6 subdivisions.

Index → code

Where it sits

  1. Chapter 1 Certain infectious and parasitic diseases (A00-B99)
  2. B25-B34 Other viral diseases (B25-B34)
  3. B33 Other viral diseases, not elsewhere classified
Billable codes
10
Subdivisions
6
CC / MCC codes
6 / 0
HCC V28 codes
1
New FY2027
0
Index entries
54

Codes in B33

  1. B33.0
    Epidemic myalgia
    Billable
    Inclusion terms 1

    Inclusion terms

    • Bornholm disease
  2. B33.1
    Ross River disease
    BillableCC
    Inclusion terms 2

    Inclusion terms

    • Epidemic polyarthritis and exanthema
    • Ross River fever
  3. B33.2
    Viral carditis
    Header
    Inclusion terms 1

    Inclusion terms

    • Coxsackie (virus) carditis
  4. B33.20
    Viral carditis, unspecified
    BillableCC
  5. B33.21
    Viral endocarditis
    BillableCC
  6. B33.22
    Viral myocarditis
    BillableCC
  7. B33.23
    Viral pericarditis
    BillableCC
  8. B33.24
    Viral cardiomyopathy
    Billable227
  9. B33.3
    Retrovirus infections, not elsewhere classified
    Billable
    Inclusion terms 1

    Inclusion terms

    • Retrovirus infection NOS
  10. B33.4
    Hantavirus (cardio)-pulmonary syndrome [HPS] [HCPS]
    BillableCC
    Inclusion terms 2, Excludes1 2, Use additional code 1

    Inclusion terms

    • Hantavirus disease with pulmonary manifestations
    • Sin nombre virus disease

    Excludes1

    • hantavirus disease with renal manifestations (A98.5) A98.5
    • hemorrhagic fever with renal manifestations (A98.5) A98.5

    Use additional code

    • code to identify any associated acute kidney failure (N17.9) N17.9
  11. B33.8
    Other specified viral diseases
    Billable
    Excludes1 2

    Excludes1

    • anogenital human papillomavirus infection (A63.0) A63.0
    • viral warts due to human papillomavirus infection (B07) B07

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

Sources of each column.

Instructions

Notes that also apply

Chapter 1 instructions (Includes 1, Excludes2 5, Use additional code 1): printed on the chapter 1 page.

Index entries

  • Bornholm disease → B33.0
  • Daae (-Finsen) disease (epidemic pleurodynia) → B33.0
  • Dabney's grip → B33.0
  • Sylvest's disease → B33.0
  • Ross River disease or fever → B33.1
  • Sin Nombre virus disease (Hantavirus) (cardio)-pulmonary syndrome → B33.4
  • Aujeszky's disease → B33.8
  • Tahyna fever → B33.8
  • Coxsackie (virus) (infection)pleurodynia → B33.0
  • Devil'sgrip → B33.0
  • Disease, diseasedBornholm (epidemic pleurodynia) → B33.0
  • Disease, diseasedDaae (-Finsen) (epidemic pleurodynia) → B33.0
  • Disease, diseasedSylvest's (epidemic pleurodynia) → B33.0
  • GripDabney's → B33.0
  • Gripdevil's → B33.0
  • Hiccup, hiccoughepidemic → B33.0
  • Myalgiaepidemic (cervical) → B33.0
  • Myositisepidemic → B33.0
  • Pleurodyniaepidemic → B33.0
  • Pleurodyniaviral → B33.0
  • Singultusepidemicus → B33.0
  • Spasm(s), spastic, spasticityepidemic diaphragmatic (transient) → B33.0
  • Disease, diseasedRoss River → B33.1
  • Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)Ross River → B33.1
  • Polyarthritis, polyarthropathyepidemic (Australian) (with exanthema) → B33.1
  • Carditis (acute) (bacterial) (chronic) (subacute)viral → B33.20
  • Coxsackie (virus) (infection)carditis → B33.20
  • Coxsackie (virus) (infection)endocarditis → B33.21
  • Endocarditis (chronic) (marantic) (nonbacterial) (thrombotic) (valvular)Coxsackie → B33.21
  • Coxsackie (virus) (infection)myocarditis → B33.22
  • Myocarditis (with arteriosclerosis)(chronic)(fibroid) (interstitial) (old) (progressive) (senile)aseptic of newborn → B33.22
  • Myocarditis (with arteriosclerosis)(chronic)(fibroid) (interstitial) (old) (progressive) (senile)Coxsackie (virus) → B33.22
  • Myocarditis (with arteriosclerosis)(chronic)(fibroid) (interstitial) (old) (progressive) (senile)epidemic of newborn (Coxsackie) → B33.22
  • Myocarditis (with arteriosclerosis)(chronic)(fibroid) (interstitial) (old) (progressive) (senile)virus, viral → B33.22
  • Coxsackie (virus) (infection)pericarditis → B33.23
  • Pericarditis (with decompensation) (with effusion)coxsackie → B33.23
  • Cardiomyopathy (familial) (idiopathic)viral → B33.24
  • Infection, infected, infective (opportunistic)retrovirus → B33.3
  • Disease, diseasedHantavirus, with pulmonary manifestations → B33.4
  • Disease, diseasedsin nombre virus → B33.4

14 more, longer entries are not listed; the search box finds them by word.

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy