Certain infectious and parasitic diseases A00-B99 >

Use Additional
Use Additional Help
Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. For such conditions the ICD-10-CM has a coding convention that requires the underlying condition be sequenced first followed by the manifestation. Wherever such a combination exists there is a "use additional code" note at the etiology code, and a "code first" note at the manifestation code. These instructional notes indicate the proper sequencing order of the codes, etiology followed by manifestation. In most cases the manifestation codes will have in the code title, "in diseases classified elsewhere." Codes with this title are a component of the etiology/manifestation convention. The code title indicates that it is a manifestation code. "In diseases classified elsewhere" codes are never permitted to be used as first listed or principle diagnosis codes. They must be used in conjunction with an underlying condition code and they must be listed following the underlying condition.
  • code to identify resistance to antimicrobial drugs (
    ICD-10-CM Diagnosis Code Z16
    • Z16 Resistance to antimicrobial drugs
      • Z16.1 Resistance to beta lactam antibiotics
        • Z16.10 Resistance to unspecified beta lactam antibio...
        • Z16.11 Resistance to penicillins
        • Z16.12 Extended spectrum beta lactamase (ESBL) resis...
        • Z16.19 Resistance to other specified beta lactam ant...
      • Z16.2 Resistance to other antibiotics
        • Z16.20 Resistance to unspecified antibiotic
        • Z16.21 Resistance to vancomycin
        • Z16.22 Resistance to vancomycin related antibiotics
        • Z16.23 Resistance to quinolones and fluoroquinolones...
        • Z16.24 Resistance to multiple antibiotics
        • Z16.29 Resistance to other single specified antibiot...
      • Z16.3 Resistance to other antimicrobial drugs
        • Z16.30 Resistance to unspecified antimicrobial drugs...
        • Z16.31 Resistance to antiparasitic drug(s)
        • Z16.32 Resistance to antifungal drug(s)
        • Z16.33 Resistance to antiviral drug(s)
        • Z16.34 Resistance to antimycobacterial drug(s)
          • Z16.341 Resistance to single antimycobacterial drug
          • Z16.342 Resistance to multiple antimycobacterial drug...
        • Z16.35 Resistance to multiple antimicrobial drugs
        • Z16.39 Resistance to other specified antimicrobial d...
Type 1 Excludes
Type 1 Excludes Help
A type 1 excludes note is a pure excludes. It means "not coded here". A type 1 excludes note indicates that the code excluded should never be used at the same time as A00-B99. A type 1 excludes note is for used for when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • certain localized infections - see body system-related chapters
Type 2 Excludes
Type 2 Excludes Help
A type 2 excludes note represents "not included here". A type 2 excludes note indicates that the condition excluded is not part of the condition it is excluded from but a patient may have both conditions at the same time. When a type 2 excludes note appears under a code it is acceptable to use both the code (A00-B99) and the excluded code together.
  • carrier or suspected carrier of infectious disease (
    ICD-10-CM Diagnosis Code Z22
    • Z22 Carrier of infectious disease
      • Z22.0 Carrier of typhoid
      • Z22.1 Carrier of other intestinal infectious diseas...
      • Z22.2 Carrier of diphtheria
      • Z22.3 Carrier of other specified bacterial diseases...
        • Z22.31 Carrier of bacterial disease due to meningoco...
        • Z22.32 Carrier of bacterial disease due to staphyloc...
          • Z22.321 Carrier or suspected carrier of Methicillin s...
          • Z22.322 Carrier or suspected carrier of Methicillin r...
        • Z22.33 Carrier of bacterial disease due to streptoco...
          • Z22.330 Carrier of Group B streptococcus
          • Z22.338 Carrier of other streptococcus
        • Z22.39 Carrier of other specified bacterial diseases...
      • Z22.4 Carrier of infections with a predominantly se...
      • Z22.6 Carrier of human T-lymphotropic virus type-1 ...
      • Z22.8 Carrier of other infectious diseases
      • Z22.9 Carrier of infectious disease, unspecified
  • infectious and parasitic diseases complicating pregnancy, childbirth and the puerperium (
    ICD-10-CM Diagnosis Code O98
    • O98 Maternal infectious and parasitic diseases cl...
      • O98.0 Tuberculosis complicating pregnancy, childbir...
        • O98.01 Tuberculosis complicating pregnancy
          • O98.011 Tuberculosis complicating pregnancy, first tr...
          • O98.012 Tuberculosis complicating pregnancy, second t...
          • O98.013 Tuberculosis complicating pregnancy, third tr...
          • O98.019 Tuberculosis complicating pregnancy, unspecif...
        • O98.02 Tuberculosis complicating childbirth
        • O98.03 Tuberculosis complicating the puerperium
      • O98.1 Syphilis complicating pregnancy, childbirth a...
        • O98.11 Syphilis complicating pregnancy
          • O98.111 Syphilis complicating pregnancy, first trimes...
          • O98.112 Syphilis complicating pregnancy, second trime...
          • O98.113 Syphilis complicating pregnancy, third trimes...
          • O98.119 Syphilis complicating pregnancy, unspecified ...
        • O98.12 Syphilis complicating childbirth
        • O98.13 Syphilis complicating the puerperium
      • O98.2 Gonorrhea complicating pregnancy, childbirth ...
        • O98.21 Gonorrhea complicating pregnancy
          • O98.211 Gonorrhea complicating pregnancy, first trime...
          • O98.212 Gonorrhea complicating pregnancy, second trim...
          • O98.213 Gonorrhea complicating pregnancy, third trime...
          • O98.219 Gonorrhea complicating pregnancy, unspecified...
        • O98.22 Gonorrhea complicating childbirth
        • O98.23 Gonorrhea complicating the puerperium
      • O98.3 Other infections with a predominantly sexual ...
        • O98.31 Other infections with a predominantly sexual ...
          • O98.311 Other infections with a predominantly sexual ...
          • O98.312 Other infections with a predominantly sexual ...
          • O98.313 Other infections with a predominantly sexual ...
          • O98.319 Other infections with a predominantly sexual ...
        • O98.32 Other infections with a predominantly sexual ...
        • O98.33 Other infections with a predominantly sexual ...
      • O98.4 Viral hepatitis complicating pregnancy, child...
        • O98.41 Viral hepatitis complicating pregnancy
          • O98.411 Viral hepatitis complicating pregnancy, first...
          • O98.412 Viral hepatitis complicating pregnancy, secon...
          • O98.413 Viral hepatitis complicating pregnancy, third...
          • O98.419 Viral hepatitis complicating pregnancy, unspe...
        • O98.42 Viral hepatitis complicating childbirth
        • O98.43 Viral hepatitis complicating the puerperium
      • O98.5 Other viral diseases complicating pregnancy, ...
        • O98.51 Other viral diseases complicating pregnancy
          • O98.511 Other viral diseases complicating pregnancy, ...
          • O98.512 Other viral diseases complicating pregnancy, ...
          • O98.513 Other viral diseases complicating pregnancy, ...
          • O98.519 Other viral diseases complicating pregnancy, ...
        • O98.52 Other viral diseases complicating childbirth
        • O98.53 Other viral diseases complicating the puerper...
      • O98.6 Protozoal diseases complicating pregnancy, ch...
        • O98.61 Protozoal diseases complicating pregnancy
          • O98.611 Protozoal diseases complicating pregnancy, fi...
          • O98.612 Protozoal diseases complicating pregnancy, se...
          • O98.613 Protozoal diseases complicating pregnancy, th...
          • O98.619 Protozoal diseases complicating pregnancy, un...
        • O98.62 Protozoal diseases complicating childbirth
        • O98.63 Protozoal diseases complicating the puerperiu...
      • O98.7 Human immunodeficiency virus [HIV] disease co...
        • O98.71 Human immunodeficiency virus [HIV] disease co...
          • O98.711 Human immunodeficiency virus [HIV] disease co...
          • O98.712 Human immunodeficiency virus [HIV] disease co...
          • O98.713 Human immunodeficiency virus [HIV] disease co...
          • O98.719 Human immunodeficiency virus [HIV] disease co...
        • O98.72 Human immunodeficiency virus [HIV] disease co...
        • O98.73 Human immunodeficiency virus [HIV] disease co...
      • O98.8 Other maternal infectious and parasitic disea...
        • O98.81 Other maternal infectious and parasitic disea...
          • O98.811 Other maternal infectious and parasitic disea...
          • O98.812 Other maternal infectious and parasitic disea...
          • O98.813 Other maternal infectious and parasitic disea...
          • O98.819 Other maternal infectious and parasitic disea...
        • O98.82 Other maternal infectious and parasitic disea...
        • O98.83 Other maternal infectious and parasitic disea...
      • O98.9 Unspecified maternal infectious and parasitic...
        • O98.91 Unspecified maternal infectious and parasitic...
          • O98.911 Unspecified maternal infectious and parasitic...
          • O98.912 Unspecified maternal infectious and parasitic...
          • O98.913 Unspecified maternal infectious and parasitic...
          • O98.919 Unspecified maternal infectious and parasitic...
        • O98.92 Unspecified maternal infectious and parasitic...
        • O98.93 Unspecified maternal infectious and parasitic...
  • infectious and parasitic diseases specific to the perinatal period (P35-P39
    ICD-10-CM Range P35-P39

    Infections specific to the perinatal period

    Applicable To
    • Infections acquired in utero, during birth via the umbilicus, or during the first 28 days after birth
    Type 2 Excludes
    • asymptomatic human immunodeficiency virus [HIV] infection status (Z21)
    • congenital gonococcal infection (A54.-)
    • congenital pneumonia (P23.-)
    • congenital syphilis (A50.-)
    • human immunodeficiency virus [HIV] disease (B20)
    • infant botulism (A48.51)
    • infectious diseases not specific to the perinatal period (A00-B99, J09, J10.-)
    • intestinal infectious disease (A00-A09)
    • laboratory evidence of human immunodeficiency virus [HIV] (R75)
    • tetanus neonatorum (A33)
    • P35 Congenital viral diseases
    • P36 Bacterial sepsis of newborn
    • P37 Other congenital infectious and parasiti...
    • P38 Omphalitis of newborn
    • P39 Other infections specific to the perinat...
  • influenza and other acute respiratory infections (
    ICD-10-CM Diagnosis Code J00

    Acute nasopharyngitis [common cold]

      2016 2017 2018 Billable/Specific Code
    Applicable To
    • Acute rhinitis
    • Coryza (acute)
    • Infective nasopharyngitis NOS
    • Infective rhinitis
    • Nasal catarrh, acute
    • Nasopharyngitis NOS
    Type 1 Excludes
    Type 2 Excludes
    ICD-10-CM Diagnosis Code J22

    Unspecified acute lower respiratory infection

      2016 2017 2018 Billable/Specific Code
    Applicable To
    • Acute (lower) respiratory (tract) infection NOS
    Type 1 Excludes
    • upper respiratory infection (acute) (J06.9)
Includes Help
"Includes" further defines, or give examples of, the content of the code or category.
  • diseases generally recognized as communicable or transmissible

ICD-10-CM Range A00-A09

Intestinal infectious diseases

  • A00 Cholera
  • A01 Typhoid and paratyphoid fevers
  • A02 Other salmonella infections
  • A03 Shigellosis
  • A04 Other bacterial intestinal infections
  • A05 Other bacterial foodborne intoxications,...
  • A06 Amebiasis
  • A07 Other protozoal intestinal diseases
  • A08 Viral and other specified intestinal inf...
  • A09 Infectious gastroenteritis and colitis, ...
ICD-10-CM Range A15-A19


  • infections due to Mycobacterium tuberculosis and Mycobacterium bovis
Type 1 Excludes
  • congenital tuberculosis (P37.0)
  • nonspecific reaction to test for tuberculosis without active tuberculosis (R76.1-)
  • pneumoconiosis associated with tuberculosis, any type in A15 (J65)
  • positive PPD (R76.11)
  • positive tuberculin skin test without active tuberculosis (R76.11)
  • sequelae of tuberculosis (B90.-)
  • silicotuberculosis (J65)
  • A15 Respiratory tuberculosis
  • A17 Tuberculosis of nervous system
  • A18 Tuberculosis of other organs
  • A19 Miliary tuberculosis
ICD-10-CM Range A20-A28

Certain zoonotic bacterial diseases

  • A20 Plague
  • A21 Tularemia
  • A22 Anthrax
  • A23 Brucellosis
  • A24 Glanders and melioidosis
  • A25 Rat-bite fevers
  • A26 Erysipeloid
  • A27 Leptospirosis
  • A28 Other zoonotic bacterial diseases, not e...
ICD-10-CM Range A30-A49

Other bacterial diseases

  • A30 Leprosy [Hansen's disease]
  • A31 Infection due to other mycobacteria
  • A32 Listeriosis
  • A33 Tetanus neonatorum
  • A34 Obstetrical tetanus
  • A35 Other tetanus
  • A36 Diphtheria
  • A37 Whooping cough
  • A38 Scarlet fever
  • A39 Meningococcal infection
  • A40 Streptococcal sepsis
  • A41 Other sepsis
  • A42 Actinomycosis
  • A43 Nocardiosis
  • A44 Bartonellosis
  • A46 Erysipelas
  • A48 Other bacterial diseases, not elsewhere ...
  • A49 Bacterial infection of unspecified site
ICD-10-CM Range A50-A64

Infections with a predominantly sexual mode of transmission

Type 1 Excludes
  • human immunodeficiency virus [HIV] disease (B20)
  • nonspecific and nongonococcal urethritis (N34.1)
  • Reiter's disease (M02.3-)
  • A50 Congenital syphilis
  • A51 Early syphilis
  • A52 Late syphilis
  • A53 Other and unspecified syphilis
  • A54 Gonococcal infection
  • A55 Chlamydial lymphogranuloma (venereum)
  • A56 Other sexually transmitted chlamydial di...
  • A57 Chancroid
  • A58 Granuloma inguinale
  • A59 Trichomoniasis
  • A60 Anogenital herpesviral [herpes simplex] ...
  • A63 Other predominantly sexually transmitted...
  • A64 Unspecified sexually transmitted disease
ICD-10-CM Range A65-A69

Other spirochetal diseases

Type 2 Excludes
  • A65 Nonvenereal syphilis
  • A66 Yaws
  • A67 Pinta [carate]
  • A68 Relapsing fevers
  • A69 Other spirochetal infections
ICD-10-CM Range A70-A74

Other diseases caused by chlamydiae

Type 1 Excludes
  • sexually transmitted chlamydial diseases (A55-A56)
  • A70 Chlamydia psittaci infections
  • A71 Trachoma
  • A74 Other diseases caused by chlamydiae
ICD-10-CM Range A75-A79


  • A75 Typhus fever
  • A77 Spotted fever [tick-borne rickettsioses]
  • A78 Q fever
  • A79 Other rickettsioses
ICD-10-CM Range A80-A89

Viral and prion infections of the central nervous system

Type 1 Excludes
  • postpolio syndrome (G14)
  • sequelae of poliomyelitis (B91)
  • sequelae of viral encephalitis (B94.1)
  • A80 Acute poliomyelitis
  • A81 Atypical virus infections of central ner...
  • A82 Rabies
  • A83 Mosquito-borne viral encephalitis
  • A84 Tick-borne viral encephalitis
  • A85 Other viral encephalitis, not elsewhere ...
  • A86 Unspecified viral encephalitis
  • A87 Viral meningitis
  • A88 Other viral infections of central nervou...
  • A89 Unspecified viral infection of central n...
ICD-10-CM Range A90-A99

Arthropod-borne viral fevers and viral hemorrhagic fevers

  • A90 Dengue fever [classical dengue]
  • A91 Dengue hemorrhagic fever
  • A92 Other mosquito-borne viral fevers
  • A93 Other arthropod-borne viral fevers, not ...
  • A94 Unspecified arthropod-borne viral fever
  • A95 Yellow fever
  • A96 Arenaviral hemorrhagic fever
  • A98 Other viral hemorrhagic fevers, not else...
  • A99 Unspecified viral hemorrhagic fever
ICD-10-CM Range B00-B09

Viral infections characterized by skin and mucous membrane lesions

  • B00 Herpesviral [herpes simplex] infections
  • B01 Varicella [chickenpox]
  • B02 Zoster [herpes zoster]
  • B03 Smallpox
  • B04 Monkeypox
  • B05 Measles
  • B06 Rubella [German measles]
  • B07 Viral warts
  • B08 Other viral infections characterized by ...
  • B09 Unspecified viral infection characterize...
ICD-10-CM Range B10-B10

Other human herpesviruses

  • B10 Other human herpesviruses
ICD-10-CM Range B15-B19

Viral hepatitis

Type 1 Excludes
  • sequelae of viral hepatitis (B94.2)
Type 2 Excludes
  • cytomegaloviral hepatitis (B25.1)
  • herpesviral [herpes simplex] hepatitis (B00.81)
  • B15 Acute hepatitis A
  • B16 Acute hepatitis B
  • B17 Other acute viral hepatitis
  • B18 Chronic viral hepatitis
  • B19 Unspecified viral hepatitis
ICD-10-CM Range B20-B20

Human immunodeficiency virus [HIV] disease

  • B20 Human immunodeficiency virus [HIV] disea...
ICD-10-CM Range B25-B34

Other viral diseases

  • B25 Cytomegaloviral disease
  • B26 Mumps
  • B27 Infectious mononucleosis
  • B30 Viral conjunctivitis
  • B33 Other viral diseases, not elsewhere clas...
  • B34 Viral infection of unspecified site
ICD-10-CM Range B35-B49


Type 2 Excludes
  • hypersensitivity pneumonitis due to organic dust (J67.-)
  • mycosis fungoides (C84.0-)
  • B35 Dermatophytosis
  • B36 Other superficial mycoses
  • B37 Candidiasis
  • B38 Coccidioidomycosis
  • B39 Histoplasmosis
  • B40 Blastomycosis
  • B41 Paracoccidioidomycosis
  • B42 Sporotrichosis
  • B43 Chromomycosis and pheomycotic abscess
  • B44 Aspergillosis
  • B45 Cryptococcosis
  • B46 Zygomycosis
  • B47 Mycetoma
  • B48 Other mycoses, not elsewhere classified
  • B49 Unspecified mycosis
ICD-10-CM Range B50-B64

Protozoal diseases

Type 1 Excludes
  • amebiasis (A06.-)
  • other protozoal intestinal diseases (A07.-)
  • B50 Plasmodium falciparum malaria
  • B51 Plasmodium vivax malaria
  • B52 Plasmodium malariae malaria
  • B53 Other specified malaria
  • B54 Unspecified malaria
  • B55 Leishmaniasis
  • B56 African trypanosomiasis
  • B57 Chagas' disease
  • B58 Toxoplasmosis
  • B59 Pneumocystosis
  • B60 Other protozoal diseases, not elsewhere ...
  • B64 Unspecified protozoal disease
ICD-10-CM Range B65-B83


  • B65 Schistosomiasis [bilharziasis]
  • B66 Other fluke infections
  • B67 Echinococcosis
  • B68 Taeniasis
  • B69 Cysticercosis
  • B70 Diphyllobothriasis and sparganosis
  • B71 Other cestode infections
  • B72 Dracunculiasis
  • B73 Onchocerciasis
  • B74 Filariasis
  • B75 Trichinellosis
  • B76 Hookworm diseases
  • B77 Ascariasis
  • B78 Strongyloidiasis
  • B79 Trichuriasis
  • B80 Enterobiasis
  • B81 Other intestinal helminthiases, not else...
  • B82 Unspecified intestinal parasitism
  • B83 Other helminthiases
ICD-10-CM Range B85-B89

Pediculosis, acariasis and other infestations

  • B85 Pediculosis and phthiriasis
  • B86 Scabies
  • B87 Myiasis
  • B88 Other infestations
  • B89 Unspecified parasitic disease
ICD-10-CM Range B90-B94

Sequelae of infectious and parasitic diseases

Code First
  • condition resulting from (sequela) the infectious or parasitic disease
  • Categories B90-B94 are to be used to indicate conditions in categories A00-B89 as the cause of sequelae, which are themselves classified elsewhere. The 'sequelae' include conditions specified as such; they also include residuals of diseases classifiable to the above categories if there is evidence that the disease itself is no longer present. Codes from these categories are not to be used for chronic infections. Code chronic current infections to active infectious disease as appropriate.
  • B90 Sequelae of tuberculosis
  • B91 Sequelae of poliomyelitis
  • B92 Sequelae of leprosy
  • B94 Sequelae of other and unspecified infect...
ICD-10-CM Range B95-B97

Bacterial and viral infectious agents

  • These categories are provided for use as supplementary or additional codes to identify the infectious agent(s) in diseases classified elsewhere.
  • B95 Streptococcus, Staphylococcus, and Enter...
  • B96 Other bacterial agents as the cause of d...
  • B97 Viral agents as the cause of diseases cl...
ICD-10-CM Range B99-B99

Other infectious diseases

  • B99 Other and unspecified infectious disease...