Incidence
Prevalence
ICD Code
V Codes
REF Codes
Diagnosis or Procedure Description
Article Reviews
Global Incidence and Prevalence
Notes in ICD Descriptions
Incidence
The number of new cases of a disease or procedure among a given group of people for a defined period of time (usually 1 year).
Prevalence
The number of people in a defined group or population who are reported to have a given disease or undergo a certain procedure.
ICD Code
ICD-9-CM Code -- The International Classification of Diseases, 9th Revision, Clinical Modification. Designed for the universal classification of morbidity and mortality information for statistical purposes, and for the indexing of records by disease and operations (surgical, diagnostic, and therapeutic procedures). ICD Codes with three digits before the decimal refer to disease diagnoses, while those with two digits before the decimal refer to procedures. The number of digits after the decimal (none, one, or two) indicates the degree of specificity of the disease or procedure classification. For example, two digits following the decimal indicate a highly specific description (493.00 = Extrinsic asthma without mention of status asthmaticus); one digit is somewhat more general (493.0 = Extrinsic asthma); and no digits are used for the most general classifications (493. = Asthma). Note that codes containing a "9" immediately after the decimal tend to refer to "other and unspecified" categories within the more general classification (e.g., 493.9 = Asthma, unspecified).
IMPORTANT: Statistical trend data (i.e. hospital inpatient, physician office visits, etc.) from the more specific codes are incorporated into the data for the more general codes: therefore codes with one (or two) digits after the decimal should not be added to codes with none (or one) following the decimal. For example, statistics reported for 493. include data from 493.0, 493.2, and 493.9; likewise, 493.0 includes data from 493.00 and 493.01, and so on.
V Codes
This classification is provided to deal with occasions or circumstances other than a disease or injury classifiable to ICD Codes 001-999. These can arise mainly in three ways: (1) when a person who is not currently sick encounters the health services for some specific purpose, such as organ donation, vaccination or discussion of a problem which in itself is not a disease or injury; (2) when a person with a known disease or injury, whether it is current or resolving, encounters the health care system for a specific treatment (e.g., dialysis, chemotherapy, cast change); and (3) when some problem is present which influences the person's health status but is not in itself a current illness or injury.
REF Codes
Special codes created by Timely Data Resources (See codes REF.1 and REF.89 through REF.99 in the complete edition). REF.89 -- REF.99 refer to valuable overviews about nursing homes, HMOs, managed care, plus other general topics not classified by the standard ICD Codes. REF.1 specifically contains profiles and descriptions of data sources used in the IPD.
Diagnosis or Procedure Description
The full-text description of each disease or procedure for a specific ICD Code or V Code.
Article Reviews
Marketing oriented information Article Reviewed from a broad array of sources for both diseases and surgical procedures. All entries specify sources. The contents of the complete edition are based on over 500 sources: trade journals, health care audits, medical journals, market investment reports, on-line databases, industry contacts, medical and scientific association reports, and national and international health care surveys. Besides incidence and prevalence, the Article Reviews focus on risk factors, trends, costs, mortality, morbidity, course of disease, and concomitant disease information essential for developing forecasts.
Global Incidence and Prevalence
Brief summaries of incidence and prevalence data by specific countries (where available). This information is compiled from the Article Reviews (only in the complete edition).
Notes in ICD Descriptions
These explain classifications or help users find related entries. When the term "General Comments" occurs along with the ICD description of the diagnosis or procedure, the related Article Reviews tend to contain broad overview information (e.g., Burns, ICD Code 949.; Cancer, ICD Code V10.; and Early complications of trauma, ICD Code 958.8).
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