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This variable is contained in the following files:
SAS Name
DGNS_1_CCSR_CTGRY_CD
AHRQ Clinical Classifications Software Refined (CCSR) Diagnosis Category Code. The CCSR aggregates International Classification of Diseases, 10th Revision, Clinical Modification/Procedure Coding System (ICD-10-CM/PCS) codes into clinically meaningful categories. The CCSR for ICD-10-CM diagnoses aggregates more than 70,000 ICD-10-CM diagnosis codes into over 530 clinical categories across 21 body systems.
AHRQ maintains the list of values at the following link; scroll to the “Downloading Information for the Tool and Documentation” portion of the page: https://www.hcupus.ahrq.gov/toolssoftware/ccsr/ccs_refined.jsp
CMS used the CCSR software v2021.2 to populate this field. CCSR uses the first three characters to indicate which of the 21 body systems applies. In the TAF the CCSR was mapped to the Primary or Principal Diagnosis Code (variable called DGNS_CD_1) The 21 systems are:
Abbreviation CCSR Body Systems
INF = Certain Infectious and Parasitic Diseases
NEO = Neoplasms
BLD = Diseases of the Blood and Blood Forming Organs and Certain Disorders Involving the Immune Mechanism
END = Endocrine, Nutritional and Metabolic Diseases
MBD = Mental, Behavioral and Neurodevelopmental Disorders
NVS = Diseases of the Nervous System
EYE = Diseases of the Eye and Adnexa
EAR = Diseases of the Ear and Mastoid Process
CIR = Diseases of the Circulatory System
RSP = Diseases of the Respiratory System
DIG = Diseases of the Digestive System
SKN = Diseases of the Skin and Subcutaneous Tissue
MUS = Diseases of the Musculoskeletal System and Connective Tissue
GEN = Diseases of the Genitourinary System
PRG = Pregnancy, Childbirth, and the Puerperium
PNL = Certain Conditions Originating in the Perinatal Period
MAL = Congenital Malformations, Deformations and Chromosomal Abnormalities
SYM = Symptoms, Signs and Abnormal Clinical and Laboratory Findings, Not Elsewhere Classified
INJ = Injury, Poisoning and Certain Other Consequences of External Causes
EXT = External Causes of Morbidity
FAC = Factors Influencing Health Status and Contact with Health Services
Values: Six-character alpha-numeric value; first three characters classify the body system (refer to COMMENT)
Ex - INF005 = Foodborne intoxications
Null/missing = source value is missing or unknown
Source: T-MSIS Analytic File (TAF) Claims