DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

B34 Viral infection of unspecified site

  • Header · not billable

B34 is not billable. The category heads 7 billable codes in FY2027: the 7 codes directly below it.

Index → code

  • Viremia → B34.9
  • Rhinovirus infection NEC → B34.8
  • Coxsackie (virus) (infection) → B34.1

Where it sits

  1. Chapter 1 Certain infectious and parasitic diseases (A00-B99)
  2. B25-B34 Other viral diseases (B25-B34)
  3. B34 Viral infection of unspecified site
Billable codes
7
Subdivisions
7
CC / MCC codes
1 / 0
HCC V28 codes
0
New FY2027
0
Index entries
30

Codes in B34

  1. B34.0
    Adenovirus infection, unspecified
    Billable
  2. B34.1
    Enterovirus infection, unspecified
    Billable
    Inclusion terms 2

    Inclusion terms

    • Coxsackievirus infection NOS
    • Echovirus infection NOS
  3. B34.2
    Coronavirus infection, unspecified
    Billable
    Excludes1 2

    Excludes1

    • COVID-19 (U07.1) U07.1
    • pneumonia due to SARS-associated coronavirus (J12.81) J12.81
  4. B34.3
    Parvovirus infection, unspecified
    BillableCC
  5. B34.4
    Papovavirus infection, unspecified
    Billable
  6. B34.8
    Other viral infections of unspecified site
    Billable
  7. B34.9
    Viral infection, unspecified
    Billable
    Inclusion terms 1

    Inclusion terms

    • Viremia NOS

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

At B34

Excludes1

  • anogenital human papillomavirus infection (A63.0) A63.0
  • cytomegaloviral disease NOS (B25.9) B25.9
  • herpesvirus [herpes simplex] infection NOS (B00.9) B00.9
  • retrovirus infection NOS (B33.3) B33.3
  • viral agents as the cause of diseases classified elsewhere (B97.-) B97
  • viral warts due to human papillomavirus infection (B07) B07

Notes that also apply

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

Index entries

  • Coxsackie (virus) (infection) → B34.1
  • Rhinovirus infection NEC → B34.8
  • Viremia → B34.9
  • Disease, diseasedcoxsackie (virus) NEC → B34.1
  • Disease, diseasedechovirus NEC → B34.1
  • Disease, diseasedenteroviral, enterovirus NEC → B34.1
  • Infection, infected, infective (opportunistic)enterovirus → B34.1
  • Infection, infected, infective (opportunistic)coronavirus NEC → B34.2
  • Infection, infected, infective (opportunistic)parvovirus NEC → B34.3
  • Infection, infected, infective (opportunistic)papovavirus NEC → B34.4
  • Infection, infected, infective (opportunistic)parainfluenza virus → B34.8
  • Virus, viralspecified NEC → B34.8
  • Disease, diseasednonarthropod-borne NOS (viral) → B34.9
  • Disease, diseasedviral, virus → B34.9
  • Infection, infected, infective (opportunistic)virus, viral NOS → B34.9
  • Syndromevirus → B34.9
  • Infection, infected, infective (opportunistic)adenovirus NECunspecified nature or site → B34.0
  • Disease, diseasednonarthropod-borne NOS (viral)enterovirus NEC → B34.1
  • Infection, infected, infective (opportunistic)echovirusunspecified nature or site → B34.1
  • Infection, infected, infective (opportunistic)virus, viral NOScoxsackie → B34.1
  • Infection, infected, infective (opportunistic)rhinovirusunspecified nature or site → B34.8
  • Arthritis, arthritic (acute) (chronic) (nonpyogenic) (subacute)in (due to)viral disease NEC → B34.9
  • Disease, diseasedviral, virusnonarthropod-borne NOS → B34.9
  • Infection, infected, infective (opportunistic)virus, viral NOSunspecified nature or site → B34.9
  • Otitis (acute)media (hemorrhagic) (staphylococcal) (streptococcal)in (due to) (with)viral disease NEC → B34.- [H67.-]
  • Infection, infected, infective (opportunistic)virus, viral NOSadenovirusunspecified nature or site → B34.0
  • Infection, infected, infective (opportunistic)virus, viral NOSECHOunspecified nature or site → B34.1
  • Infection, infected, infective (opportunistic)virus, viral NOSrhinovirusunspecified nature or site → B34.8
  • Infection, infected, infective (opportunistic)virus, viral NOSspecified type NECunspecified nature or site → B34.8
  • Otitis (acute)externain (due to)viral disease NEC → B34.9 [H62.4-]

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

Hierarchy