ICD-10-CM Codes
R00-R99 Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified
R50-R69 General symptoms and signs
Fever of other and unknown origin R50

Fever of other and unknown origin R50-

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 R50. 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.

chills without fever (
ICD-10-CM Diagnosis Code R68.83
Chills (without fever)
Applicable To
- Chills NOS
Type 1 Excludes
- chills with fever (R50.9)
R68.83
)
febrile convulsions (
ICD-10-CM Diagnosis Code R56.0
Febrile convulsions
R56.0-
)
fever of unknown origin during labor (
ICD-10-CM Diagnosis Code O75.2
Pyrexia during labor, not elsewhere classified
O75.2
)
fever of unknown origin in newborn (
ICD-10-CM Diagnosis Code P81.9
Disturbance of temperature regulation of newborn, unspecified
Applicable To
- Fever of newborn NOS
P81.9
)
hypothermia due to illness (
ICD-10-CM Diagnosis Code R68.0
Hypothermia, not associated with low environmental temperature
Type 1 Excludes
- hypothermia NOS (accidental) (T68)
- hypothermia due to anesthesia (T88.51)
- hypothermia due to low environmental temperature (T68)
- newborn hypothermia (P80.-)
R68.0
)
malignant hyperthermia due to anesthesia (
ICD-10-CM Diagnosis Code T88.3
Malignant hyperthermia due to anesthesia
Use Additional
- code for adverse effect, if applicable, to identify drug (T41.- with fifth or sixth character 5)
T88.3
)
puerperal pyrexia NOS (
ICD-10-CM Diagnosis Code O86.4
Pyrexia of unknown origin following delivery
Applicable To
- Puerperal infection NOS following delivery
- Puerperal pyrexia NOS following delivery
Type 2 Excludes
- pyrexia during labor (O75.2)
O86.4
)

Clinical Information

Fever in which the etiology cannot be ascertained.

Codes

R50 Fever of other and unknown origin
- R50.2 Drug induced fever
- R50.8 Other specified fever
  - R50.81 Fever presenting with conditions classified elsewhere
  - R50.82 Postprocedural fever
  - R50.83 Postvaccination fever
  - R50.84 Febrile nonhemolytic transfusion reaction
- R50.9 Fever, unspecified

Fever of other and unknown origin R50-

Chills (without fever)

Febrile convulsions

Pyrexia during labor, not elsewhere classified

Disturbance of temperature regulation of newborn, unspecified

Hypothermia, not associated with low environmental temperature

Malignant hyperthermia due to anesthesia

Pyrexia of unknown origin following delivery