Alphabetic Index · main term

Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor)

FY2027Index: Fe /Alphabetic Index

At the main termR50.9

Fever (inanition) (of unknown origin) (persistent) (with chills) (with rigor) is a main term in the FY2027 ICD-10-CM Alphabetic Index (Index to Diseases and Injuries). The Index lists R50.9 for the term on its own. It has 341 subterms and 294 code entries. First-level subterms include abortus, Aden, African tick bite, African tick-borne, American, aphthous, arbovirus, arboviral, Argentinian hemorrhagic and more. Confirm any code you find here in the Tabular List before you report it.

Subterms 341

abortusA23.1
Aden (dengue)A90
African tick biteA77.8
African tick-borneA68.1
American
- mountain (tick)A93.2
- spottedA77.0
aphthousB08.8
arbovirus, arboviralA94
- hemorrhagicA94
- specified NECA93.8
Argentinian hemorrhagicA96.0
AssamB55.0
Australian QA78
Bangkok hemorrhagicA91
Barmah forestA92.8
BartonellaA44.0
bilious, hemoglobinuricB50.8
blackwaterB50.8
blisterB00.1
Bolivian hemorrhagicA96.1
Bonvale damT73.3
boutonneuseA77.1
brain see Encephalitis
Brazilian purpuricA48.4
breakboneA90
BullisA77.0
BunyamweraA92.8
BurdwanB55.0
BwambaA92.8
Cameroon see Malaria
CantonA75.9
catarrhal (acute)J00
- chronicJ31.0
cat-scratchA28.1
Central Asian hemorrhagicA98.0
cerebral see Encephalitis
cerebrospinal meningococcalA39.0
ChagresB50.9
ChandipuraA92.8
ChanguinolaA93.1
Charcot's (biliary) (hepatic) (intermittent) see Calculus, bile duct
Chikungunya (viral) (hemorrhagic)A92.0
ChitralA93.1
Colombo see Fever, paratyphoid
Colorado tick (virus)A93.2
congestive (remittent) see Malaria
Congo virusA98.0
continued malarialB50.9
Corsican see Malaria
Crimean-Congo hemorrhagicA98.0
Cyprus see Brucellosis
dandyA90
deer fly see Tularemia
dengue (virus)A90
- hemorrhagicA91
- sandflyA93.1
desertB38.0
drug inducedR50.2
due to
- conditions classified elsewhereR50.81
- heatT67.01
entericA01.00
enteroviral exanthematous (Boston exanthem)A88.0
ephemeral (of unknown origin)R50.9
epidemic hemorrhagicA98.5
erysipelatous see Erysipelas
estivo-autumnal (malarial)B50.9
famineA75.0
five dayA79.0
following deliveryO86.4
Fort BraggA27.89
gastroentericA01.00
gastromalarial see Malaria
Gibraltar see Brucellosis
glandular see Mononucleosis, infectious
Guama (viral)A92.8
HaverhillA25.1
hay (allergic)J30.1
- with asthma (bronchial)J45.909
  - with
    exacerbation (acute)J45.901
    status asthmaticusJ45.902
- due to
  - allergen other than pollenJ30.89
  - pollen, any plant or treeJ30.1
heat (effects)T67.01
hematuric, biliousB50.8
hemoglobinuric (malarial) (bilious)B50.8
hemorrhagic (arthropod-borne) NOSA94
- with renal syndromeA98.5
- arenaviralA96.9
  - specified NECA96.8
- ArgentinianA96.0
- BangkokA91
- BolivianA96.1
- Central AsianA98.0
- ChikungunyaA92.0
- Crimean-CongoA98.0
- dengue (virus)A91
- epidemicA98.5
- Junin (virus)A96.0
- KoreanA98.5
- Kyasanur forestA98.2
- Machupo (virus)A96.1
- mite-borneA93.8
- mosquito-borneA92.8
- OmskA98.1
- PhilippineA91
- RussianA98.5
- SingaporeA91
- Southeast AsiaA91
- ThailandA91
- tick-borne NECA93.8
- viralA99
  - specified NECA98.8
hepatic see Cholecystitis
herpetic see Herpes
icterohemorrhagicA27.0
IndianaA93.8
infectiveB99.9
- specified NECB99.8
intermittent (bilious) see also Malaria
- of unknown originR50.9
- perniciousB50.9
iodideR50.2
Japanese riverA75.3
jungle see also Malaria
- yellowA95.0
Junin (virus) hemorrhagicA96.0
KatayamaB65.2
kedaniA75.3
Kenya (tick)A77.1
Kew GardenA79.1
Korean hemorrhagicA98.5
LassaA96.2
Lone StarA77.0
Machupo (virus) hemorrhagicA96.1
malaria, malarial see Malaria
MaltaA23.9
MarseillesA77.1
marsh see Malaria
Mayaro (viral)A92.8
Mediterranean see also BrucellosisA23.9
- familialM04.1
- tickA77.1
meningeal see Meningitis
MeuseA79.0
MexicanA75.2
mianehA68.1
miasmatic see Malaria
mosquito-borne (viral)A92.9
- hemorrhagicA92.8
mountain see also Brucellosis
- meaning Rocky Mountain spotted feverA77.0
- tick (American) (Colorado) (viral)A93.2
Mucambo (viral)A92.8
mudA27.9
Neapolitan see Brucellosis
neutropenicD70.9
newbornP81.9
- environmentalP81.0
Nine-MileA78
non-exanthematous tickA93.2
North Asian tick-borneA77.2
Omsk hemorrhagicA98.1
O'nyong-nyong (viral)A92.1
Oropouche (viral)A93.0
OroyaA44.0
pacific coast tickA77.8
paludal see Malaria
Panama (malarial)B50.9
PappataciA93.1
paratyphoidA01.4
- AA01.1
- BA01.2
- CA01.3
parrotA70
periodic (Mediterranean)M04.1
persistent (of unknown origin)R50.9
petechialA39.0
pharyngoconjunctivalB30.2
Philippine hemorrhagicA91
phlebotomusA93.1
Piry (virus)A93.8
Pixuna (viral)A92.8
Plasmodium ovaleB53.0
polioviral (nonparalytic)A80.4
PontiacA48.2
postimmunizationR50.83
postoperativeR50.82
- due to infectionT81.40
posttransfusionR50.84
postvaccinationR50.83
presenting with conditions classified elsewhereR50.81
pretibialA27.89
puerperalO86.4
QA78
quadrilateralA78
quartan (malaria)B52.9
Queensland (coastal) (tick)A77.3
quintanA79.0
rabbit see Tularemia
rat-biteA25.9
- due to
  - SpirillumA25.0
  - Streptobacillus moniliformisA25.1
recurrent see Fever, relapsing
relapsing (Borrelia)A68.9
- Carter's (Asiatic)A68.1
- Dutton's (West African)A68.1
- Koch'sA68.9
- louse-borneA68.0
- Novy's
  - louse-borneA68.0
  - tick-borneA68.1
- Obermeyer's (European)A68.0
- tick-borneA68.1
remittent (bilious) (congestive) (gastric) see Malaria
rheumatic (active) (acute) (chronic) (subacute)I00
- with central nervous system involvementI02.9
- active with heart involvement see categoryI01
- inactive or quiescent with
  - cardiac hypertrophyI09.89
  - carditisI09.9
  - endocarditisI09.1
    aortic (valve)I06.9
    with mitral (valve) diseaseI08.0
    mitral (valve)I05.9
    with aortic (valve) diseaseI08.0
    pulmonary (valve)I09.89
    tricuspid (valve)I07.8
  - heart disease NECI09.89
  - heart failure (congestive) (conditions in category I50.)I09.81
  - left ventricular failure (conditions in I50.1-I50.4-)I09.81
  - myocarditis, myocardial degeneration (conditions in I51.4)I09.0
  - pancarditisI09.9
  - pericarditisI09.2
Rift Valley (viral)A92.4
Rocky Mountain spottedA77.0
roseJ30.1
Ross RiverB33.1
Russian hemorrhagicA98.5
San Joaquin (Valley)B38.0
sandflyA93.1
Sao PauloA77.0
scarletA38.9
seven day (leptospirosis) (autumnal) (Japanese)A27.89
- dengueA90
shin-boneA79.0
Singapore hemorrhagicA91
solarA90
SongoA98.5
soreB00.1
South African tick-biteA68.1
Southeast Asia hemorrhagicA91
spinal see Meningitis
spirillaryA25.0
splenic see Anthrax
spottedA77.9
- AmericanA77.0
- BrazilianA77.0
- cerebrospinal meningitisA39.0
- ColombianA77.0
- due to Rickettsia
  - africae (African tick bite fever)A77.8
  - australisA77.3
  - conoriiA77.1
  - parkeriA77.8
  - rickettsiiA77.0
  - sibiricaA77.2
  - specified type NECA77.8
- EhrlichiosisA77.40
  - due to
    E. chaffeensisA77.41
    specified organism NECA77.49
- Rocky MountainA77.0
steroidR50.2
streptobacillaryA25.1
subtertianB50.9
Sumatran miteA75.3
sunA90
swampA27.9
swineA02.8
sylvatic, yellowA95.0
TahynaB33.8
tertian see Malaria, tertian
Thailand hemorrhagicA91
thermicT67.01
three-dayA93.1
tick
- American mountainA93.2
- ColoradoA93.2
- KemerovoA93.8
- MediterraneanA77.1
- mountainA93.2
- nonexanthematousA93.2
- QuaranfilA93.8
tick-bite NECA93.8
tick-borne (hemorrhagic) NECA93.8
trenchA79.0
tsutsugamushiA75.3
typhogastricA01.00
typhoid (abortive) (hemorrhagic) (intermittent) (malignant)A01.00
- complicated by
  - arthritisA01.04
  - heart involvementA01.02
  - meningitisA01.01
  - osteomyelitisA01.05
  - pneumoniaA01.03
  - specified NECA01.09
typhomalarial see Malaria
typhus see Typhus (fever)
undulant see Brucellosis
unknown originR50.9
uveoparotidD86.89
valleyB38.0
Venezuelan equineA92.2
vesicular stomatitisA93.8
viral hemorrhagic see Fever, hemorrhagic, by type of virus
VolhynianA79.0
Wesselsbron (viral)A92.8
West
- AfricanB50.8
- Nile (viral)A92.30
  - with
    complications NECA92.39
    cranial nerve disordersA92.32
    encephalitisA92.31
    encephalomyelitisA92.31
    neurologic manifestation NECA92.32
    optic neuritisA92.32
    polyradiculitisA92.32
Whitmore's see Melioidosis
WolhynianA79.0
wormB83.9
yellowA95.9
- jungleA95.0
- sylvaticA95.0
- urbanA95.1
Zika virusA92.5