Rickettsioses – Definitions, ICD 10 Codes & ICD 11 Codes

Definition of Rickettsioses: Any disease caused by an infection with the gram-negative bacteria Rickettsia. These diseases commonly present with fever, malaise, and rash. Transmission is commonly through the bite of an infected flea, louse, mite, or tick.

Typhus Fever

Definition of Typhus Fever: A disease caused by an infection with the gram-negative bacteria Rickettsia. This disease is characterised by fever, delirium, back pain, or arthralgia. Transmission is commonly through the bite of an infected flea, louse, mite, or tick.

ICD 11 Code For Typhus Fever

1C30 Typhus Fever

Exclusions: Rickettsiosis due to Ehrlichia sennetsu

1C30.0 Epidemic louse-borne typhus fever due to Rickettsia prowazekii

Definition of Epidemic louse-borne typhus fever due to Rickettsia prowazekii: This is a form of typhus so named because the disease often causes epidemics following wars and natural disasters. The causative organism is Rickettsia prowazekii, transmitted by the human body louse (Pediculus humanus corporis). This diagnosis is due to is a species of gram negative, Alpha Proteobacteria, obligate intracellular parasitic, aerobic bacteria that is the aetiologic agent of epidemic typhus, transmitted in the faeces of lice.

1C30.1 Recrudescent typhus

Definition of Recrudescent typhus: This is a form of typhus so named because the disease often causes epidemics following wars and natural disasters. The causative organism is Rickettsia prowazekii, transmitted by the human body louse (Pediculus humanus corporis).

Inclusions:

• Brill-Zinsser disease

1C30.2 Typhus fever due to Rickettsia typhi

1C30.3 Typhus fever due to Orientia tsutsugamushi

Inclusions:

• Tsutsugamushi fever

1C30.Y Other specified typhus fever
1C30.Z Typhus fever unspecified

ICD 10 Code For Typhus Fever

A75 Typhus Fever

Exclusions:

• Rickettsiosis due to Neorickettsia sennetsu [Ehrlichia sennetsu]

A75.0 Epidemic louse-borne typhus fever due to Rickettsia prowazekii

• Classical typhus (fever)
• Epidemic (louse-borne) typhus

A75.1 Recrudescent typhus [Brill disease]

• Brill-Zinsser disease

A75.2 Typhus fever due to Rickettsia typhi

• Murine (flea-borne) typhus

A75.3 Typhus fever due to Rickettsia tsutsugamushi

• Scrub (mite-borne) typhus
• Tsutsugamushi fever

A75.9 Typhus fever unspecified

• Typhus (fever) NOS

Spotted Fever

Definition of Spotted Fever: A disease caused by an infection with the gram-negative bacteria Rickettsia. This disease is characterised by fever, eschar, or rash. Transmission is commonly through the bite of an infected tick

ICD 11 Code For Spotted Fever

1C31 Spotted Fever

1C31.0 Spotted fever due to Rickettsia rickettsii

Inclusions:

• Rocky Mountain spotted fever
• Sao Paulo fever

1C31.1 Spotted fever due to Rickettsia conorii

Inclusions:

• Boutonneuse fever
• Mediterranean tick fever
• African tick typhus
• Kenya tick typhus

1C31.2 Spotted fever due to Rickettsia sibirica

Inclusions:

• North Asian tick fever
• Siberian tick typhus

1C31.3 Spotted fever due to Rickettsia australis

Inclusions:

• Queensland tick typhus

1C31.Y Other specified spotted fever

1C31.Z Spotted fever unspecified

ICD 10 Code For Spotted Fever

A77 Spotted Fever [tick-borne rickettsioses]

A77.0 Spotted fever due to Rickettsia rickettsii

• Rocky Mountain spotted fever
• Sao Paulo fever

A77.1 Spotted fever due to Rickettsia conorii

• African tick typhus
• Boutonneuse fever
• India tick typhus
• Kenya tick typhus
• Marseilles fever
• Mediterranean tick fever

A77.2 Spotted fever due to Rickettsia sibirica

• North Asian tick fever
• Siberian tick typhus

A77.3 Spotted fever due to Rickettsia australis

• Queensland tick typhus

A77.8 Other spotted fevers

A77.9 Spotted fever unspecified

• Tick-borne typhus NOS

Rickettsialpox

Definition of Rickettsialpox: An acute febrile disease caused by Rickettsia akari, which is transmitted from its rodent host by the house-mouse mite Liponyssoides sanguineus. An initial skin lesion at the site of a mite bite, often associated with lymphadenopathy, is followed by fever; a disseminated skin rash appears, which generally does not involve the palms and the soles, and lasts only a few days. Death is uncommon.

ICD 11 Code For Rickettsialpox

1C32 Rickettsialpox

Inclusions:

• Kew Gardens spotted fever

ICD 10 Code For Rickettsialpox

A79.1 Rickettsialpox due to Rickettsia akari

• Kew Garden fever
• Vesicular rickettsiosis

Q Fever

ICD 11 Code For Q Fever

1C33 Q Fever

Definition of Q fever: A disease caused by an infection with the gram-negative bacteria Coxiella burnetti. This disease is characterised by fever, or may be asymptomatic. Transmission is by inhalation of the bacteria, contact with contaminated milk, urine, faeces, vaginal mucus, or semen of infected animals, or through the bite of an infected tick.

Inclusions:

• Nine Mile fever
• Infection due to Coxiella burnetii
• Quadrilateral fever

ICD 10 Code For Q Fever

A78 Q Fever

Inclusions:

• Infection due to Coxiella burnetii
• Nine Mile fever
• Quadrilateral fever

Other specified Rickettsioses

ICD 11 Code for other specified Rickettsioses

1C3Y Other specified Rickettsioses

ICD 10 Code for other specified Rickettsioses

A79 Other Rickettsioses

A79.0 Trench fever

• Quintan fever
• Wolhynian fever

A79.8 Other specified rickettsioses

• Rickettsiosis due to Neorickettsia sennetsu [Ehrlichia sennetsu]

Rickettsioses unspecified

ICD 11 Code for Rickettsioses unspecified

1C3Z Rickettsioses unspecified

ICD 10 Code for Rickettsioses unspecified

A79.9 Rickettsiosis unspecified

• Rickettsial infection NOS

Campylobacteriosis

Definition of Campylobacteriosis: Campylobacteriosis is caused by Campylobacter bacteria (curved or spiral, motile, non–spore-forming, Gram-negative rods). The disease is usually caused by C. jejuni, a spiral and comma shaped bacterium normally found in cattle, swine, and birds, where it is nonpathogenic, but the illness can also be caused by C. coli (also found in cattle, swine, and birds), C. upsaliensis (found in cats and dogs) and C. lari (present in seabirds in particular).

ICD 11 Code for Campylobacteriosis

1C40 Campylobacteriosis

Bacterial infection of unspecified site

ICD 11 Code for Bacterial infection of unspecified site

1C41 Bacterial infection of unspecified site

Exclusions:

• meningococcal infection NOS
• chlamydial infection NOS
• rickettsial infection NOS
• spirochaetal infection NOS

Coded Elsewhere:

• Acute meningococcaemia
• Disseminated gonococcal infection

Melioidosis

Definition of Melioidosis: A disease caused by the saprophytic environmental gram-negative bacterium Burkholderia pseudomallei which is found in soil or water in humid tropical regions of the world, especially South-East Asia and northern Australia. It has protean manifestations ranging from fulminant septicaemia with fatal outcome to chronic low grade infection.

ICD 11 Code for Melioidosis

1C42 Melioidosis

ICD 10 Code for Melioidosis

A24 Glanders and melioidosis

A24.0 Glanders

• Infection due to Pseudomonas mallei
• Infection due to Burkholderia mallei
• Malleus

A24.1 Acute and fulminating melioidosis

Melioidosis:

• pneumonia
• sepsis

A24.2 Subacute and chronic melioidosis

A24.3 Other melioidosis

A24.4 Melioidosis unspecified

• Infection due to Pseudomonas pseudomallei NOS
• Infection due to Burkholderia pseudomallei NOS
• Whitmore disease

Actinomycetoma

Definition of Actinomycetoma: Actinomycetoma is a chronic progressive subcutaneous infection caused by implantation of aerobic branching actinomycetes through a skin wound. These organisms are filamentous bacteria which live as saprophytes in soil or on plants; the commonest infecting agents are Nocardia brasiliensis, Actinomadura madurae and Streptomyces somaliensis. The earliest stage of infection is a firm painless nodule but with time the whole area becomes hard and swollen with multiple papules, pustules and draining sinuses on the skin surface. Extension to underlying bones and joints can result in gross deformity.

ICD 11 Code for Actinomycetoma

1C43  Actinomycetoma

Inclusions:

• Mycetoma due to filamentous bacteria

Exclusions:

• Eumycetoma

ICD 10 Code for Actinomycetoma

B47.1 Actinomycetoma

B47.9 Mycetoma unspecified

• Madura foot NOS

Non-pyogenic bacterial infections of the skin

Definition of Non-pyogenic bacterial infections of the skin: Skin infection by bacteria which do not characteristically induce pus formation.

ICD 11 Code for Non-pyogenic bacterial infections of the skin

1C44 Non-pyogenic bacterial infections of the skin

Other specified bacterial diseases

ICD 11 Code for other specified bacterial diseases

1C4Y Other specified bacterial diseases

ICD 10 Code for other specified bacterial diseases

A30-A49 Other bacterial diseases

A30 Leprosy [Hansen disease]

Inclusions:

• infection due to Mycobacterium leprae

Exclusions:

• sequelae of leprosy

A30.0 Indeterminate leprosy

• I leprosy

A30.1 Tuberculoid leprosy

• TT leprosy

A30.2 Borderline tuberculoid leprosy

• BT leprosy

A30.3 Borderline leprosy

• BB leprosy

A30.4 Borderline lepromatous leprosy

• BL leprosy

A30.5 Lepromatous leprosy

• LL leprosy

A30.8 Other forms of leprosy

A30.9 Leprosy unspecified

Unspecified bacterial disease

ICD 11 Code for Unspecified bacterial disease

1C4Z Unspecified bacterial disease