Index to Diseases and Injuries
Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)
Index code:R50.9
- abortus A23.1
- Aden (dengue) A90
- African tick bite A77.8
- African tick-borne A68.1
- American →
- aphthous B08.8
- arbovirus, arboviral →
- Argentinian hemorrhagic A96.0
- Assam B55.0
- Australian Q A78
- Bangkok hemorrhagic A91
- Barmah forest A92.8
- Bartonella A44.0
- bilious, hemoglobinuric B50.8
- blackwater B50.8
- blister B00.1
- Bolivian hemorrhagic A96.1
- Bonvale dam T73.3
- boutonneuse A77.1
- brain — see Encephalitis
- Brazilian purpuric A48.4
- breakbone A90
- Bullis A77.0
- Bunyamwera A92.8
- Burdwan B55.0
- Bwamba A92.8
- Cameroon — see Malaria
- Canton A75.9
- catarrhal (acute) →
- cat-scratch A28.1
- Central Asian hemorrhagic A98.0
- cerebral — see Encephalitis
- cerebrospinal meningococcal A39.0
- Chagres B50.9
- Chandipura A92.8
- Changuinola A93.1
- Charcot's (biliary) (hepatic) (intermittent) — see Calculus, bile duct
- Chikungunya (viral) (hemorrhagic) A92.0
- Chitral A93.1
- Colombo — see Fever, paratyphoid
- Colorado tick (virus) A93.2
- congestive (remittent) — see Malaria
- Congo virus A98.0
- continued malarial B50.9
- Corsican — see Malaria
- Crimean-Congo hemorrhagic A98.0
- Cyprus — see Brucellosis
- dandy A90
- deer fly — see Tularemia
- dengue (virus) →
- desert B38.0
- drug induced R50.2
- due to →
- enteric A01.00
- enteroviral exanthematous (Boston exanthem) A88.0
- ephemeral (of unknown origin) R50.9
- epidemic hemorrhagic A98.5
- erysipelatous — see Erysipelas
- estivo-autumnal (malarial) B50.9
- famine A75.0
- five day A79.0
- following delivery O86.4
- Fort Bragg A27.89
- gastroenteric A01.00
- gastromalarial — see Malaria
- Gibraltar — see Brucellosis
- glandular — see Mononucleosis, infectious
- Guama (viral) A92.8
- Haverhill A25.1
- hay (allergic) →
- heat (effects) T67.01
- hematuric, bilious B50.8
- hemoglobinuric (malarial) (bilious) B50.8
- hemorrhagic (arthropod-borne) NOS →
- hepatic — see Cholecystitis
- herpetic — see Herpes
- icterohemorrhagic A27.0
- Indiana A93.8
- infective →
- intermittent (bilious) →
- iodide R50.2
- Japanese river A75.3
- jungle →
- Junin (virus) hemorrhagic A96.0
- Katayama B65.2
- kedani A75.3
- Kenya (tick) A77.1
- Kew Garden A79.1
- Korean hemorrhagic A98.5
- Lassa A96.2
- Lone Star A77.0
- Machupo (virus) hemorrhagic A96.1
- malaria, malarial — see Malaria
- Malta A23.9
- Marseilles A77.1
- marsh — see Malaria
- Mayaro (viral) A92.8
- Mediterranean →
- meningeal — see Meningitis
- Meuse A79.0
- Mexican A75.2
- mianeh A68.1
- miasmatic — see Malaria
- mosquito-borne (viral) →
- mountain →
- Mucambo (viral) A92.8
- mud A27.9
- Neapolitan — see Brucellosis
- neutropenic D70.9
- newborn →
- Nine-Mile A78
- non-exanthematous tick A93.2
- North Asian tick-borne A77.2
- Omsk hemorrhagic A98.1
- O'nyong-nyong (viral) A92.1
- Oropouche (viral) A93.0
- Oroya A44.0
- pacific coast tick A77.8
- paludal — see Malaria
- Panama (malarial) B50.9
- Pappataci A93.1
- paratyphoid →
- parrot A70
- periodic (Mediterranean) M04.1
- persistent (of unknown origin) R50.9
- petechial A39.0
- pharyngoconjunctival B30.2
- Philippine hemorrhagic A91
- phlebotomus A93.1
- Piry (virus) A93.8
- Pixuna (viral) A92.8
- Plasmodium ovale B53.0
- polioviral (nonparalytic) A80.4
- Pontiac A48.2
- postimmunization R50.83
- postoperative →
- posttransfusion R50.84
- postvaccination R50.83
- presenting with conditions classified elsewhere R50.81
- pretibial A27.89
- puerperal O86.4
- Q A78
- quadrilateral A78
- quartan (malaria) B52.9
- Queensland (coastal) (tick) A77.3
- quintan A79.0
- rabbit — see Tularemia
- rat-bite →
- recurrent — see Fever, relapsing
- relapsing (Borrelia) →
- remittent (bilious) (congestive) (gastric) — see Malaria
- rheumatic (active) (acute) (chronic) (subacute) →
- Rift Valley (viral) A92.4
- Rocky Mountain spotted A77.0
- rose J30.1
- Ross River B33.1
- Russian hemorrhagic A98.5
- San Joaquin (Valley) B38.0
- sandfly A93.1
- Sao Paulo A77.0
- scarlet A38.9
- seven day (leptospirosis) (autumnal) (Japanese) →
- shin-bone A79.0
- Singapore hemorrhagic A91
- solar A90
- Songo A98.5
- sore B00.1
- South African tick-bite A68.1
- Southeast Asia hemorrhagic A91
- spinal — see Meningitis
- spirillary A25.0
- splenic — see Anthrax
- spotted →
- steroid R50.2
- streptobacillary A25.1
- subtertian B50.9
- Sumatran mite A75.3
- sun A90
- swamp A27.9
- swine A02.8
- sylvatic, yellow A95.0
- Tahyna B33.8
- tertian — see Malaria, tertian
- Thailand hemorrhagic A91
- thermic T67.01
- three-day A93.1
- tick →
- tick-bite NEC A93.8
- tick-borne (hemorrhagic) NEC A93.8
- trench A79.0
- tsutsugamushi A75.3
- typhogastric A01.00
- typhoid (abortive) (hemorrhagic) (intermittent) (malignant) →
- typhomalarial — see Malaria
- typhus — see Typhus (fever)
- undulant — see Brucellosis
- unknown origin R50.9
- uveoparotid D86.89
- valley B38.0
- Venezuelan equine A92.2
- vesicular stomatitis A93.8
- viral hemorrhagic — see Fever, hemorrhagic, by type of virus
- Volhynian A79.0
- Wesselsbron (viral) A92.8
- West →
- Whitmore's — see Melioidosis
- Wolhynian A79.0
- worm B83.9
- yellow →
- Zika virus A92.5
Use the index to find a code, then confirm it in the Tabular List before assigning it. A code ending in a dash is incomplete, and a code in [brackets] is a manifestation code reported after the underlying condition. Search the whole index.
Frequently asked questions
What is the ICD-10-CM code for Fever?
The ICD-10-CM Alphabetic Index directs "Fever" to R50.9. Subterms below it may lead to a more specific code. Always confirm the code in the Tabular List before assigning it.
ICD-10-CM Index to Diseases and Injuries maintained by CDC/NCHS (public domain), from the CMS FY2027 release.