R00-R99

Symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified

This chapter includes symptoms, signs, abnormal results of clinical or other investigative procedures, and ill-defined conditions regarding which no diagnosis classifiable elsewhere is recorded.

Signs and symptoms that point rather definitely to a given diagnosis have been assigned to a category in other chapters of the classification. In general, categories in this chapter include the less well-defined conditions and symptoms that, without the necessary study of the case to establish a final diagnosis, point perhaps equally to two or more diseases or to two or more systems of the body. Practically all categories in the chapter could be designated ‘not otherwise specified’, ‘unknown etiology’ or ‘transient’. The Alphabetical Index should be consulted to determine which symptoms and signs are to be allocated here and which to other chapters. The residual subcategories, numbered .8, are generally provided for other relevant symptoms that cannot be allocated elsewhere in the classification.

a) cases for which no more specific diagnosis can be made even after all the facts bearing on the case have been investigated;

b) signs or symptoms existing at the time of initial encounter that proved to be transient and whose causes could not be determined;

c) provisional diagnosis in a patient who failed to return for further investigation or care;

d) cases referred elsewhere for investigation or treatment before the diagnosis was made;

e) cases in which a more precise diagnosis was not available for any other reason;

f) certain symptoms, for which supplementary information is provided, that represent important problems in medical care in their own right.

Symptoms and signs involving the circulatory and respiratory systems

Symptoms and signs involving the digestive system and abdomen

Symptoms and signs involving the skin and subcutaneous tissue

Symptoms and signs involving the nervous and musculoskeletal systems

Symptoms and signs involving the genitourinary system

Symptoms and signs involving cognition, perception, emotional state and behavior

Symptoms and signs involving speech and voice

General symptoms and signs

Abnormal findings on examination of blood, without diagnosis

Abnormal findings on examination of urine, without diagnosis

Abnormal findings on examination of other body fluids, substances and tissues, without diagnosis

Abnormal findings on diagnostic imaging and in function studies, without diagnosis

Abnormal tumor markers

Ill-defined and unknown cause of mortality