HCUP Data Element
Descriptive Title
Years
File(s) for years other than 2015
File(s) in 2015
Select All
Data elements change frequently, and are only current as of the date generated.
AGE
Age in years at admission
2010+
Core
Core
APRDRG
All Patient Refined DRG
2010+
Severity
Q1Q3 and Q4 Severity
APRDRG_Risk_Mortality
All Patient Refined DRG: Risk of Mortality Subclass
2010+
Severity
Q1Q3 and Q4 Severity
APRDRG_Severity
All Patient Refined DRG: Severity of Illness Subclass
2010+
Severity
Q1Q3 and Q4 Severity
AWEEKEND
Admission day is on a weekend
2010+
Core
Core
BODYSYSTEMn
ICD-9-CM Body system n
2014-2015 Q3
DX_PR_Grps
Q1Q3 DX_PR_Grps (not in Q4)
CHRONBn
Chronic Condition Indicators - body system
2010-2013
DX_PR_Grps
CHRONn
ICD-9-CM Chronic Condition Indicators
2010-2015 Q3
DX_PR_Grps
Q1Q3 DX_PR_Grps (not in Q4)
CM_AIDS
AHRQ comorbidity measure for ICD-9-CM codes: acquired immune deficiency syndrome
2010-2015 Q3
Severity
Q1Q3 Severity (not in Q4)
CM_ALCOHOL
AHRQ comorbidity measure for ICD-9-CM codes: alcohol abuse
2010-2015 Q3
Severity
Q1Q3 Severity (not in Q4)
CM_ANEMDEF
AHRQ comorbidity measure for ICD-9-CM codes: deficiency anemias
2010-2015 Q3
Severity
Q1Q3 Severity (not in Q4)
CM_ARTH
AHRQ comorbidity measure for ICD-9-CM codes: rheumatoid arthritis/collagen vascular diseases
2010-2015 Q3
Severity
Q1Q3 Severity (not in Q4)
CM_BLDLOSS
AHRQ comorbidity measure for ICD-9-CM codes: chronic blood loss anemia
2010-2015 Q3
Severity
Q1Q3 Severity (not in Q4)
CM_CHF
AHRQ comorbidity measure for ICD-9-CM codes: congestive heart failure
2010-2015 Q3
Severity
Q1Q3 Severity (not in Q4)
CM_CHRNLUNG
AHRQ comorbidity measure for ICD-9-CM codes: chronic pulmonary disease
2010-2015 Q3
Severity
Q1Q3 Severity (not in Q4)
CM_COAG
AHRQ comorbidity measure for ICD-9-CM codes: coagulopathy
2010-2015 Q3
Severity
Q1Q3 Severity (not in Q4)
CM_DEPRESS
AHRQ comorbidity measure for ICD-9-CM codes: depression
2010-2015 Q3
Severity
Q1Q3 Severity (not in Q4)
CM_DM
AHRQ comorbidity measure for ICD-9-CM codes: diabetes, uncomplicated
2010-2015 Q3
Severity
Q1Q3 Severity (not in Q4)
CM_DMCX
AHRQ comorbidity measure for ICD-9-CM codes: diabetes with chronic complications
2010-2015 Q3
Severity
Q1Q3 Severity (not in Q4)
CM_DRUG
AHRQ comorbidity measure for ICD-9-CM codes: drug abuse
2010-2015 Q3
Severity
Q1Q3 Severity (not in Q4)
CM_HTN_C
AHRQ comorbidity measure for ICD-9-CM codes: hypertension (combine uncomplicated and complicated)
2010-2015 Q3
Severity
Q1Q3 Severity (not in Q4)
CM_HYPOTHY
AHRQ comorbidity measure for ICD-9-CM codes: hypothyroidism
2010-2015 Q3
Severity
Q1Q3 Severity (not in Q4)
CM_LIVER
AHRQ comorbidity measure for ICD-9-CM codes: liver disease
2010-2015 Q3
Severity
Q1Q3 Severity (not in Q4)
CM_LYMPH
AHRQ comorbidity measure for ICD-9-CM codes: lymphoma
2010-2015 Q3
Severity
Q1Q3 Severity (not in Q4)
CM_LYTES
AHRQ comorbidity measure for ICD-9-CM codes: fluid and electrolyte disorders
2010-2015 Q3
Severity
Q1Q3 Severity (not in Q4)
CM_METS
AHRQ comorbidity measure for ICD-9-CM codes: metastatic cancer
2010-2015 Q3
Severity
Q1Q3 Severity (not in Q4)
CM_NEURO
AHRQ comorbidity measure for ICD-9-CM codes: other neurological disorders
2010-2015 Q3
Severity
Q1Q3 Severity (not in Q4)
CM_OBESE
AHRQ comorbidity measure for ICD-9-CM codes: obesity
2010-2015 Q3
Severity
Q1Q3 Severity (not in Q4)
CM_PARA
AHRQ comorbidity measure for ICD-9-CM codes: paralysis
2010-2015 Q3
Severity
Q1Q3 Severity (not in Q4)
CM_PERIVASC
AHRQ comorbidity measure for ICD-9-CM codes: peripheral vascular disorders
2010-2015 Q3
Severity
Q1Q3 Severity (not in Q4)
CM_PSYCH
AHRQ comorbidity measure for ICD-9-CM codes: psychoses
2010-2015 Q3
Severity
Q1Q3 Severity (not in Q4)
CM_PULMCIRC
AHRQ comorbidity measure for ICD-9-CM codes: pulmonary circulation disorders
2010-2015 Q3
Severity
Q1Q3 Severity (not in Q4)
CM_RENLFAIL
AHRQ comorbidity measure for ICD-9-CM codes: renal failure
2010-2015 Q3
Severity
Q1Q3 Severity (not in Q4)
CM_TUMOR
AHRQ comorbidity measure for ICD-9-CM codes: solid tumor without metastasis
2010-2015 Q3
Severity
Q1Q3 Severity (not in Q4)
CM_ULCER
AHRQ comorbidity measure for ICD-9-CM codes: peptic ulcer disease excluding bleeding
2010-2015 Q3
Severity
Q1Q3 Severity (not in Q4)
CM_VALVE
AHRQ comorbidity measure for ICD-9-CM codes: valvular disease
2010-2015 Q3
Severity
Q1Q3 Severity (not in Q4)
CM_WGHTLOSS
AHRQ comorbidity measure for ICD-9-CM codes: weight loss
2010-2015 Q3
Severity
Q1Q3 Severity (not in Q4)
CMR_aaa
Elixhauser Comorbidity Measure Refined for ICD-10-CM diagnosis codes
2019+
DX_PR_GRPS
CMR_VERSION
Version of the Elixhauser Comorbidity Measure Refined for ICD-10-CM diagnosis codes
2019+
DX_PR_GRPS
DIED
Died during hospitalization
2010+
Core
Core
DISCWT
Weight to discharges in the universe
2010+
Core
Core
DISPUNIFORM
Disposition of patient, uniform coding
2010+
Core
Core
DMONTH
Discharge month
2010+
Core
Core
DQTR
Discharge quarter
2010+
Core
Core
DRG
DRG in use on discharge date
2010+
Core
Q1Q3 and Q4 DX_PR_Grps
DRG_NoPOA
DRG in use on discharge date, calculated without POA
2010+
Core
Q1Q3 and Q4 DX_PR_Grps
DRGVER
DRG or MS-DRG grouper version used on discharge date
2010+
Core
Q1Q3 and Q4 DX_PR_Grps
DXCCSn
Clinical Classifications Software (CCS): ICD-9-CM diagnosis classification
2010-2015 Q3
Core
Q1Q3 DX_PR_Grps (not in Q4)
DXCCSR_AAAnnn
Clinical Classifications Software Refined (CCSR): ICD-10-CM Diagnosis Classification within Body System AAA
2018+
DX_PR_GRPS
Not available
DXCCSR_Default_DX1
Default Clinical Classifications Software Refined (CCSR) for principal/first-listed ICD-10-CM diagnosis
2018+
DX_PR_GRPS
Not available
DXCCSR_VERSION
Version of the Clinical Classifications Software Refined (CCSR) for ICD-10-CM diagnosis codes
2018+
DX_PR_GRPS
Not available
DXMCCSn
Multi-Level CCS for ICD-9-CM Diagnoses
2010-2015 Q3
DX_PR_GRPS
Q1Q3 DX_PR_Grps (not in Q4)
DXn
ICD-9-CM Diagnosis
2010-2015 Q3
Core
Q1Q3 DX_PR_Grps (not in Q4)
DXVER
Diagnosis codes ICD version indicator
2015-2017
Core
Q1Q3 and Q4 DX_PR_Grps
E_CCSn
Clinical Classifications Software (CCS) for ICD-9-CM External Cause of Injury Code
2010-2015 Q3
Core
Q1Q3 DX_PR_Grps (not in Q4)
ECODEn
ICD-9-CM External Cause of Injury Code
2010-2015 Q3
Core
Q1Q3 DX_PR_Grps (not in Q4)
E_MCCSn
Multi-Level CCS for ICD-9-CM External Cause of Injury Code
2010-2015 Q3
DX_PR_Grps
Q1Q3 DX_PR_Grps (not in Q4)
ELECTIVE
Elective versus non-elective admission
2010+
Core
Core
FEMALE
Indicator of sex
2010+
Core
Core
H_CONTRL
Control/ownership of hospital
2010+
Hospital
Hospital
HCUP_ED
HCUP indicator of emergency department record
2010+
Core
Core
HOSP_BEDSIZE
Bedsize of hospital
2010+
Hospital
Hospital
HOSP_NRD
HCUP NRD hospital identification number
2010+
Core, Hospital, Severity, Dx_Pr_Grps (Dx_Pr_Grps not available in 2016-2017)
Core, Hospital, Q1Q3 and Q4 Severity, Q1Q3 and Q4 Dx_Pr_Grps
HOSP_UR_TEACH
Teaching status of hospital
2010+
Hospital
Hospital
HOSP_URCAT4
Hospital urban-rural designation
2010+
Hospital
Hospital
I10_BIRTH
ICD-10-CM Birth Indicator
2019+
Core
I10_DELIVERY
ICD-10-CM Delivery Indicator
2019+
Core
I10_DXn
ICD-10-CM Diagnosis
2015 Q4 - 2016+
Core
Q4 DX_PR_Grps
I10_ECAUSEn
ICD-10-CM External Cause of Morbidity Code
2015 Q4 - 2016
Core
Q4 DX_PR_Grps
I10_INJURY
Injury ICD-10-CM diagnosis reported on record
2019+
Core
I10_MULTINJURY
Multiple ICD-10-CM injuries reported on record
2019+
Core
I10_NDX
Number of ICD-10-CM diagnoses on this discharge
2015 Q4 - 2016+
Core
Q4 DX_PR_Grps
I10_NECAUSE
Number of ICD-10-CM External Cause of Morbidity codes on this record
2015 Q4 - 2016
Core
Q4 DX_PR_Grps
I10_NPR
Number of ICD-10-PCS procedures on this discharge
2015 Q4 - 2016+
Core
Q4 DX_PR_Grps
I10_PRn
ICD-10-PCS Procedure
2015 Q4 - 2016+
Core
Q4 DX_PR_Grps
I10_SERVICELINE
Service line based on ICD-10-CM/PCS codes
2019+
Core
KEY_NRD
HCUP NRD record identifier
2010+
Core, Severity, Dx_Pr_Grps (Dx_Pr_Grps not available in 2016-2017)
Core, Q1Q3 and Q4 Severity, Q1Q3 and Q4 Dx_Pr_Grps
LOS
Length of stay, cleaned
2010+
Core
Core
MDC
MDC in effect on discharge date
2010+
Core
Q1Q3 and Q4 DX_PR_Grps
MDC_NoPOA
MDC in use on discharge date, calculated without POA
2010+
Core
Q1Q3 and Q4 DX_PR_Grps
N_DISC_U
Number of universe discharges in the stratum
2010+
Hospital
Hospital
N_HOSP_U
Number of universe hospitals in the stratum
2010+
Hospital
Hospital
NCHRONIC
ICD-9-CM Number of chronic conditions
2010-2015 Q3
Core
Q1Q3 DX_PR_Grps (not in Q4)
NDX
Number of ICD-9-CM diagnoses on this discharge
2010-2015 Q3
Core
Q1Q3 DX_PR_Grps (not in Q4)
NECODE
Number of ICD-9-CM External of Cause of Injury Codes on this Record
2010-2015 Q3
Core
Q1Q3 DX_PR_Grps (not in Q4)
NPR
Number of ICD-9-CM procedures on this discharge
2010-2015 Q3
Core
Q1Q3 DX_PR_Grps (not in Q4)
NRD_DaysToEvent
Days from "start date" to admission
2010+
Core
Core
NRD_STRATUM
NRD Stratum used for weighting
2010+
Core, Hospital
Core, Hospital
NRD_VisitLink
Patient linkage variable in the NRD
2010+
Core
Core
ORPROC
Major operating room ICD-9-CM procedure indicator
2010-2015 Q3
Core
Q1Q3 DX_PR_Grps (not in Q4)
PAY1
Expected primary payer, uniform
2010+
Core
Core
PCLASSn
Procedure Classes Refined for ICD-10-PCS procedure codes
2010-2015 Q3; 2019+
DX_PR_Grps
Q1Q3 DX_PR_Grps (not in Q4)
PCLASS_ORPROC
Major operating room ICD-10-PCS procedure indicator
2019+
Core
PCLASS_VERSION
Version of the Procedure Classes Refined for ICD-10-PCS procedure codes
2019+
DX_PR_GRPS
PL_NCHS
Patient Location: NCHS Urban-Rural Code
2010+
Core
Core
PRCCSn
Clinical Classifications Software (CCS) for ICD-9-CM Procedures
2010-2015 Q3
Core
Q1Q3 DX_PR_Grps (not in Q4)
PRCCSR_aaannn
Clinical Classifications Software Refined (CCSR): ICD-10-PCS Procedure Classification within Clinical Domain aaa
2019+
DX_PR_GRPS
PRCCSR_VERSION
Version of the Clinical Classifications Software Refined (CCSR) for ICD-10-PCS procedure codes
2019+
DX_PR_GRPS
PRDAYn
Number of days from admission to procedure n
2014+
Core
Q1Q3 and Q4 DX_PR_Grps
PRMCCSn
Multi-Level CCS for ICD-9-CM Procedures
2010-2015 Q3
DX_PR_Grps
Q1Q3 DX_PR_Grps (not in Q4)
PRn
ICD-9-CM Procedure
2010-2015 Q3
Core
Q1Q3 DX_PR_Grps (not in Q4)
PRVER
Procedure codes ICD version indicator
2015-2017
Core
Q1Q3 and Q4 DX_PR_Grps
REHABTRANSFER
A combined record involving transfer to rehabilitation, evaluation, or other aftercare
2010+
Core
Core
RESIDENT
Identifies patient as a resident of the State in which he or she received hospital care
2010+
Core
Core
S_DISC_U
Number of discharges in the sample for the stratum
2010+
Hospital
Hospital
S_HOSP_U
Number of hospitals in the sample for the stratum
2010+
Hospital
Hospital
SAMEDAYEVENT
Identifies transfer and same-day stay collapsed records
2010+
Core
Core
SERVICELINE
Service line based on ICD-9 codes
2014-2015 Q3
Core
Q1Q3 DX_PR_Grps (not in Q4)
TOTAL_DISC
Number of hospital discharges in the sample
2010+
Hospital
Hospital
TOTCHG
Total charges, cleaned
2010+
Core
Core
YEAR
Calendar year
2010+
Core, Hospital
Core, Hospital
ZIPINC_QRTL
Median household income for patient's ZIP Code (based on current year)
2010+
Core
Core
Abbreviations: DX, diagnosis; PR, procedure; Q1, discharge quarter 1; Q3, discharge quarter 3; Q4, discharge quarter 4.