HCUP NIS Data dictionary - onetomapanalytics/Meta_Data GitHub Wiki
HCUP NIS - Data dictionary
| HCUP Data Element | Descriptive Title | Years | File(s) for years other than 2015 | File(s) in 2015 |
|---|---|---|---|---|
| ADAYWK | Admission day of week | 1988-1997 | Core | |
| AGE | Age in years at admission | 1988-2020 | Core | Core |
| AGE_NEONATE | Neonatal age (first 28 days after birth) indicator | 2012-2020 | Core | Core |
| AGEDAY | Age in days (when AGE is less than 1 year) | 1988-2011 | Core | |
| AHAID | AHA hospital identifier | 1988-2011 | Hospital | |
| AMONTH | Admission month | 1988-2020 | Core | Core |
| APRDRG | All Patient Refined DRG | 2002-2020 | Severity | Q1Q3 and Q4 Severity |
| APRDRG_Risk_Mortality | All Patient Refined DRG: Risk of Mortality Subclass | 2002-2020 | Severity | Q1Q3 and Q4 Severity |
| APRDRG_Severity | All Patient Refined DRG: Severity of Illness Subclass | 2002-2020 | Severity | Q1Q3 and Q4 Severity |
| APSDRG | All-Payer Severity-adjusted DRG | 2002-2009 | Severity | |
| APSDRG_Charge_Weight | All-Payer Severity-adjusted DRG: Charge Weight | 2002-2009 | Severity | |
| APSDRG_LOS_Weight | All-Payer Severity-adjusted DRG: Length of Stay Weight | 2002-2009 | Severity | |
| APSDRG_Mortality_Weight | All-Payer Severity-adjusted DRG: Mortality Weight | 2002-2009 | Severity | |
| ASOURCE | Admission source, uniform coding | 1988-2011 | Core | |
| ASOURCE_X | Admission source, as received from source | 1988-2011 | Core | |
| ASOURCEUB92 | Admission source, (UB-92 standard coding) | 2003-2011 | Core | |
| ATYPE | Admission type | 1988-2011 | Core | |
| AWEEKEND | Admission day is on a weekend | 1998-2020 | Core | Core |
| BODYSYSTEMn | ICD-9-CM Body system n | 2014-2015 Q3 | Dx_Pr_Grps | Q1Q3 Dx_Pr_Grps (not in Q4) |
| CCSMGNn | Clinical Classification Software (CCS) for Mental Health and Substance Abuse - General | 2005-2006 | Dx_Pr_Grps | |
| CCSMSPn | Clinical Classification Software (CCS) for Mental Health and Substance Abuse - Detail | 2005-2006 | Dx_Pr_Grps | |
| CHRONn | ICD-9-CM Chronic Condition Indicators | 2005-2015 Q3 | Dx_Pr_Grps | Q1Q3 Dx_Pr_Grps (not in Q4) |
| CHRONBn | Chronic Condition Indicators - body system | 2005-2013 | Dx_Pr_Grps | |
| CM_AIDS | AHRQ comorbidity measure for ICD-9-CM codes: acquired immune deficiency syndrome | 2002-2015 Q3 | Severity | Q1Q3 Severity (not in Q4) |
| CM_ALCOHOL | AHRQ comorbidity measure for ICD-9-CM codes: alcohol abuse | 2002-2015 Q3 | Severity | Q1Q3 Severity (not in Q4) |
| CM_ANEMDEF | AHRQ comorbidity measure for ICD-9-CM codes: deficiency anemias | 2002-2015 Q3 | Severity | Q1Q3 Severity (not in Q4) |
| CM_ARTH | AHRQ comorbidity measure for ICD-9-CM codes: rheumatoid arthritis/collagen vascular diseases | 2002-2015 Q3 | Severity | Q1Q3 Severity (not in Q4) |
| CM_BLDLOSS | AHRQ comorbidity measure for ICD-9-CM codes: chronic blood loss anemia | 2002-2015 Q3 | Severity | Q1Q3 Severity (not in Q4) |
| CM_CHF | AHRQ comorbidity measure for ICD-9-CM codes: congestive heart failure | 2002-2015 Q3 | Severity | Q1Q3 Severity (not in Q4) |
| CM_CHRNLUNG | AHRQ comorbidity measure for ICD-9-CM codes: chronic pulmonary disease | 2002-2015 Q3 | Severity | Q1Q3 Severity (not in Q4) |
| CM_COAG | AHRQ comorbidity measure for ICD-9-CM codes: coagulopathy | 2002-2015 Q3 | Severity | Q1Q3 Severity (not in Q4) |
| CM_DEPRESS | AHRQ comorbidity measure for ICD-9-CM codes: depression | 2002-2015 Q3 | Severity | Q1Q3 Severity (not in Q4) |
| CM_DM | AHRQ comorbidity measure for ICD-9-CM codes: diabetes, uncomplicated | 2002-2015 Q3 | Severity | Q1Q3 Severity (not in Q4) |
| CM_DMCX | AHRQ comorbidity measure for ICD-9-CM codes: diabetes with chronic complications | 2002-2015 Q3 | Severity | Q1Q3 Severity (not in Q4) |
| CM_DRUG | AHRQ comorbidity measure for ICD-9-CM codes: drug abuse | 2002-2015 Q3 | Severity | Q1Q3 Severity (not in Q4) |
| CM_HTN_C | AHRQ comorbidity measure for ICD-9-CM codes: hypertension (combine uncomplicated and complicated) | 2002-2015 Q3 | Severity | Q1Q3 Severity (not in Q4) |
| CM_HYPOTHY | AHRQ comorbidity measure for ICD-9-CM codes: hypothyroidism | 2002-2015 Q3 | Severity | Q1Q3 Severity (not in Q4) |
| CM_LIVER | AHRQ comorbidity measure for ICD-9-CM codes: liver disease | 2002-2015 Q3 | Severity | Q1Q3 Severity (not in Q4) |
| CM_LYMPH | AHRQ comorbidity measure for ICD-9-CM codes: lymphoma | 2002-2015 Q3 | Severity | Q1Q3 Severity (not in Q4) |
| CM_LYTES | AHRQ comorbidity measure for ICD-9-CM codes: fluid and electrolyte disorders | 2002-2015 Q3 | Severity | Q1Q3 Severity (not in Q4) |
| CM_METS | AHRQ comorbidity measure for ICD-9-CM codes: metastatic cancer | 2002-2015 Q3 | Severity | Q1Q3 Severity (not in Q4) |
| CM_NEURO | AHRQ comorbidity measure for ICD-9-CM codes: other neurological disorders | 2002-2015 Q3 | Severity | Q1Q3 Severity (not in Q4) |
| CM_OBESE | AHRQ comorbidity measure for ICD-9-CM codes: obesity | 2002-2015 Q3 | Severity | Q1Q3 Severity (not in Q4) |
| CM_PARA | AHRQ comorbidity measure for ICD-9-CM codes: paralysis | 2002-2015 Q3 | Severity | Q1Q3 Severity (not in Q4) |
| CM_PERIVASC | AHRQ comorbidity measure for ICD-9-CM codes: peripheral vascular disorders | 2002-2015 Q3 | Severity | Q1Q3 Severity (not in Q4) |
| CM_PSYCH | AHRQ comorbidity measure for ICD-9-CM codes: psychoses | 2002-2015 Q3 | Severity | Q1Q3 Severity (not in Q4) |
| CM_PULMCIRC | AHRQ comorbidity measure for ICD-9-CM codes: pulmonary circulation disorders | 2002-2015 Q3 | Severity | Q1Q3 Severity (not in Q4) |
| CM_RENLFAIL | AHRQ comorbidity measure for ICD-9-CM codes: renal failure | 2002-2015 Q3 | Severity | Q1Q3 Severity (not in Q4) |
| CM_TUMOR | AHRQ comorbidity measure for ICD-9-CM codes: solid tumor without metastasis | 2002-2015 Q3 | Severity | Q1Q3 Severity (not in Q4) |
| CM_ULCER | AHRQ comorbidity measure for ICD-9-CM codes: peptic ulcer disease excluding bleeding | 2002-2015 Q3 | Severity | Q1Q3 Severity (not in Q4) |
| CM_VALVE | AHRQ comorbidity measure for ICD-9-CM codes: valvular disease | 2002-2015 Q3 | Severity | Q1Q3 Severity (not in Q4) |
| CM_WGHTLOSS | AHRQ comorbidity measure for ICD-9-CM codes: weight loss | 2002-2015 Q3 | Severity | Q1Q3 Severity (not in Q4) |
| CMR_aaa | Elixhauser Comorbidity Measure Refined for ICD-10-CM diagnosis codes | 2019-2020 | DX_PR_GRPS | |
| CMR_VERSION | Version of the Elixhauser Comorbidity Measure Refined for ICD-10-CM diagnosis codes | 2019-2020 | DX_PR_GRPS | |
| D10CWT_U | 10% sample weight to discharges in the universe | 1988-1997 | Hospital | |
| DCCHPRn | Clinical Classifications Software: diagnosis classification | 1988-1997 | Core | |
| DIED | Died during hospitalization | 1988-2020 | Core | Core |
| DISCWT | Weight to discharges in the universe | 1998-2020 | Core, Hospital | Core, Hospital |
| DISCWT_F | Weight to discharges in frame states | 1988-1997 | Hospital | |
| DISCWT_S | Weight to discharges in state | 1988-1997 | Hospital | |
| DISCWT_U | Weight to discharges in universe | 1988-1997 | Hospital | |
| DISCWT10 | 10% sample weight to discharges in the universe | 1998-2004 | Subsample | |
| DISCWTcharge | Weight to discharges in the universe for national estimates of total charge in 2000. | 2000 | Core, Hospital | |
| DISCWTcharge10 | 10% sample weight to discharges in the universe for national estimates of total charge in 2000. | 2000 | Subsample | |
| DISP | Disposition of patient | 1988-1997 | Core | |
| DISPUB04 | Disposition of patient, UB04 standard coding | 2007-2011 | Core | |
| DISPUB92 | Disposition of patient, UB92 coding | 1998-2006 | Core | |
| DISPUNIFORM | Disposition of patient, uniform coding | 1998-2020 | Core | Core |
| DQTR | Discharge quarter | 1988-2020 | Core | Core |
| DQTR_X | Discharge quarter, as received from data source | 2006-2011 | Core | |
| DRG | DRG in use on discharge date | 1988-2020 | Core | Q1Q3 and Q4 Dx_Pr_Grps |
| DRG_NoPOA | DRG in use on discharge date, calculated without POA | 2008-2020 | Core | Q1Q3 and Q4 Dx_Pr_Grps |
| DRG10 | DRG, Version 10 | 1988-1999 | Core | |
| DRG18 | DRG, Version 18 | 1998-2005 | Core | |
| DRG24 | DRG, Version 24 | 2006-2014 | Core | |
| DRGVER | DRG or MS-DRG grouper version used on discharge date | 1988-2020 | Core | Q1Q3 and Q4 Dx_Pr_Grps |
| DS_DX_Category1 | Disease Staging: Principal Disease Category | 2002-2010 | Severity | |
| DS_LOS_Level | Disease Staging: Length of Stay Level | 2002-2007 | Severity | |
| DS_LOS_Scale | Disease Staging: Length of Stay Scale | 2002-2007 | Severity | |
| DS_Mrt_Level | Disease Staging:Mortality Level | 2002-2007 | Severity | |
| DS_Mrt_Scale | Disease Staging: Mortality Scale | 2002-2007 | Severity | |
| DS_RD_Level | Disease Staging: Resource Demand Level | 2002-2007 | Severity | |
| DS_RD_Scale | Disease Staging: Resource Demand Scale | 2002-2007 | Severity | |
| DS_Stage1 | Disease Staging: Stage of Principal Disease Category | 2002-2010 | Severity | |
| DSHOSPID | Data source hospital number | 1988-2011 | Core | |
| DSNDX | Maximum number of diagnoses provided by source | 1988-1997 | Core | |
| DSNPR | Maximum number of procedures provided by source | 1988-1997 | Core | |
| DSNUM | Date source identification number | 1988-1997 | Core | |
| DSTYPE | Data source type | 1988-1997 | Core | |
| DXn | ICD-9-CM Diagnosis | 1988-2015 Q3 | Core | Q1Q3 Dx_Pr_Grps (not in Q4) |
| DXCCSn | Clinical Classifications Software (CCS): ICD-9-CM diagnosis classification | 1998-2015 Q3 | Core | Q1Q3 Dx_Pr_Grps (not in Q4) |
| DXCCSR_Default_DX1 | Default Clinical Classifications Software Refined (CCSR) for principal/first-listed ICD-10-CM diagnosis | 2018-2020 | DX_PR_GRPS | |
| DXCCSR_VERSION | Version of the Clinical Classifications Software Refined (CCSR) for ICD-10-CM diagnosis codes | 2018-2020 | DX_PR_GRPS | |
| DXCCSR_AAAnnn | Clinical Classifications Software Refined (CCSR): ICD-10-CM Diagnosis Classification within Body System AAA | 2018-2020 | DX_PR_GRPS | |
| DXMCCSn | Multi-Level CCS for ICD-9-CM Diagnoses | 2009-2015 Q3 | Dx_Pr_Grps | Q1Q3 Dx_Pr_Grps (not in Q4) |
| DXSYS | Diagnosis coding system | 1988-1997 | Core | |
| DXVER | Diagnosis codes ICD version indicator | 2015-2017 | Core | Q1Q3 and Q4 Dx_Pr_Grps |
| DXVn | Diagnosis validity flag: Diagnosis n | 1988-1997 | Core | |
| E_CCSn | Clinical Classifications Software (CCS) for ICD-9-CM External Cause of Injury Code | 2003-2015 Q3 | Core | Q1Q3 Dx_Pr_Grps (not in Q4) |
| E_MCCSn | Multi-Level CCS for ICD-9-CM External Cause of Injury Code | 2009-2015 Q3 | Dx_Pr_Grps | Q1Q3 Dx_Pr_Grps (not in Q4) |
| ECCSMGNn | Clinical Classification Software (CCS) for Mental Health and Substance Abuse - General | 2005-2006 | Dx_Pr_Grps | |
| ECODEn | ICD-9-CM External Cause of Injury Code | 2003-2015 Q3 | Core | Q1Q3 Dx_Pr_Grps (not in Q4) |
| ELECTIVE | Elective versus non-elective admission | 2002-2020 | Core | Core |
| FEMALE | Indicator of sex | 1998-2020 | Core | Core |
| H_BEDSZ | Bedsize of hospital (definition used prior to 1998) | 1993-1997 | Hospital | |
| H_CONTRL | Control/ownership of hospital | 1993-1997, 2008-2020 | Hospital | Hospital |
| H_LOC | Location of hospital (definition used prior to 1998) | 1993-1997 | Hospital | |
| H_LOCTCH | Location/teaching status of hospital (definition used prior to 1998) | 1993-1997 | Hospital | |
| H_REGION | Hospital census region | 1993-1997 | Hospital | |
| H_TCH | Hospital teaching status (definition used prior to 1998) | 1993-1997 | Hospital | |
| HCUP_ED | HCUP indicator of emergency department record | 2007-2020 | Core | Core |
| HFIPSSTCO | Hospital FIPS State/County code | 2004-2011 | Hospital | |
| HOSP_BEDSIZE | Bedsize of hospital | 1998-2020 | Hospital | Hospital |
| HOSP_CONTROL | Control/ownership of hospital | 1998-2011 | Hospital | |
| HOSP_DIVISION | Census Division of hospital (STRATA) | 2012-2020 | Core, Hospital | Core, Hospital |
| HOSP_LOCATION | Location (urban/rural) of hospital | 1998-2011 | Hospital | |
| HOSP_LOCTEACH | Location/teaching status of hospital | 1998-2020 | Hospital | Hospital |
| HOSP_LPNFTEAPD | LPN FTEs per 1000 adjusted inpatient days | 2007-2011 | Hospital | |
| HOSP_MHSCLUSTER | Multi-hospital system cluster code | 2007-2011 | Hospital | |
| HOSP_MHSMEMBER | Multi-hospital system membership | 2007-2011 | Hospital | |
| HOSP_NAFTEAPD | Nurse aides per 1000 adjusted inpatient days | 2007-2011 | Hospital | |
| HOSP_NIS | NIS hospital number | 2012-2020 | Core, Hospital, Severity, Dx_Pr_Grps(Dx_Pr_Grps file not available after 2016) | Core, Hospital, Q1Q3 and Q4 Severity, Q1Q3 and Q4 Dx_Pr_Grps |
| HOSP_OPSURGPCT | Percentage of all surgeries performed in the outpatient setting | 2007-2011 | Hospital | |
| HOSP_REGION | Region of hospital | 1998-2020 | Hospital | Hospital |
| HOSP_RNFTEAPD | RN FTEs per 1000 adjusted inpatient days | 2007-2011 | Hospital | |
| HOSP_RNPCT | Percentage of RNs among all nurses (RNs and LPNs) | 2007-2011 | Hospital | |
| HOSP_TEACH | Teaching status of hospital | 1998-2011 | Hospital | |
| HOSPADDR | Hospital address from AHA Annual Survey | 1993-2011 | Hospital | |
| HOSPBRTH | ICD-9-CM diagnosis indicates in-hospital birth | 2006-2015 Q3 | Core | Q1Q3 Dx_Pr_Grps (not in Q4) |
| HOSPCITY | Hospital city from AHA Annual Survey | 1993-2011 | Hospital | |
| HOSPID | HCUP hospital identification number | 1998-2011 | Core, Hospital, Severity, Dx_Pr_Grps | |
| HOSPNAME | Hospital name from AHA Annual Survey | 1993-2011 | Hospital | |
| HOSPST | Hospital State postal code | 1988-2011 | Core, Hospital | |
| HOSPSTCO | Hospital modified FIPS state/county code | 1988-2011 | Core (1988-2002), Hospital (2002-2011) | |
| HOSPWT | Weight to hospitals in the universe | 1998-2011 | Hospital | |
| HOSPWT_F | Weight to hospitals in the frame states | 1988-1997 | Hospital | |
| HOSPWT_S | Weight to hospitals in the state | 1988-1997 | Hospital | |
| HOSPWT_U | Weight to hospitals in the universe | 1988-1997 | Hospital | |
| HOSPZIP | Hospital zip code from AHA Annual Survey | 1993-2011 | Hospital | |
| I10_BIRTH | ICD-10-CM Birth Indicator | 2019-2020 | Core | |
| I10_DELIVERY | ICD-10-CM Delivery Indicator | 2019-2020 | Core | |
| I10_DXn | ICD-10-CM Diagnosis | 2015 Q4, 2016-2020 | 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 | 2019-2020 | Core | |
| I10_MULTINJURY | Multiple ICD-10-CM injuries reported on record | 2019-2020 | Core | |
| I10_NDX | Number of ICD-10-CM diagnoses on this discharge | 2015 Q4, 2016-2020 | 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, 2016-2020 | Core | Q4 Dx_Pr_Grps |
| I10_PRn | ICD-10-PCS Procedure | 2015 Q4, 2016-2020 | Core | Q4 Dx_Pr_Grps |
| I10_SERVICELINE | Service line based on ICD-10-CM/PCS codes | 2019-2020 | Core | |
| IDNUMBER | Modified AHA hospital identifier | 1988-2011 | Hospital | |
| KEY | Unique record identifier | 1998-2011 | Core, Severity, Dx_Pr_Grps | |
| KEY_NIS | NIS record number | 2012-2020 | Core, Severity, Dx_Pr_Grps (Dx_Pr_Grps not available after 2016) | Core, Q1Q3 and Q4 Severity, Q1Q3 and Q4 Dx_Pr_Grps |
| LOCTEACH | Hospital location and teaching status | 1988-1992 | Hospital | |
| LOS | Length of stay, cleaned | 1988-2020 | Core | Core |
| LOS_X | Length of stay, as received from data source | 1988-2011 | Core | |
| MDC | MDC in effect on discharge date | 1988-2020 | Core | Q1Q3 and Q4 Dx_Pr_Grps |
| MDC_NoPOA | MDC in use on discharge date, calculated without POA | 2009-2020 | Core | Q1Q3 and Q4 Dx_Pr_Grps |
| MDC10 | MDC, Version 10 | 1988-1999 | Core | |
| MDC18 | MDC, Version 18 | 1998-2005 | Core | |
| MDC24 | MDC, Version 24 | 2006-2014 | Core | |
| MDID_S | Synthetic attending physician number | 1988-2000 | Core | |
| MDNUM1_R | Physician 1 number (re-identified) | 2003-2009 | Core | |
| MDNUM1_S | Physician 1 number (synthetic) | 2001-2002 | Core | |
| MDNUM2_R | Physician 2 number (re-identified) | 2003-2009 | Core | |
| MDNUM2_S | Physician 2 number (synthetic) | 2001-2002 | Core | |
| N_DISC_F | Number of frame state discharges in STRATUM | 1988-1997 | Hospital | |
| N_DISC_S | Number of state's discharges in STRAT_ST | 1988-1997 | Hospital | |
| N_DISC_U | Number of universe discharges in the stratum | 1988-2020 | Hospital | Hospital |
| N_HOSP_F | Number of frame state hospitals in STRATUM | 1988-1997 | Hospital | |
| N_HOSP_S | Number of state's hospitals in STRAT_ST | 1988-1997 | Hospital | |
| N_HOSP_U | Number of universe hospitals in the stratum | 1988-2020 | Hospital | Hospital |
| NCHRONIC | ICD-9-CM Number of chronic conditions | 2008-2015 Q3 | Core | Q1Q3 Dx_Pr_Grps (not in Q4) |
| NDX | Number of ICD-9-CM diagnoses on this discharge | 1988-2015 Q3 | Core | Q1Q3 Dx_Pr_Grps (not in Q4) |
| NECODE | Number of ICD-9-CM External of Cause of Injury Codes on this Record | 2003-2015 Q3 | Core | Q1Q3 Dx_Pr_Grps (not in Q4) |
| NEOMAT | Neonatal and/or maternal ICD-9-CM DX and/or PR | 1988-2015 Q3 | Core | Q1Q3 Dx_Pr_Grps (not in Q4) |
| NIS_STRATUM | Stratum used to post-stratify hospital | 1998-2020 | Core (2000+), Hospital | Core, Hospital |
| NPR | Number of ICD-9-CM procedures on this discharge | 1988-2015 Q3 | Core | Q1Q3 Dx_Pr_Grps (not in Q4) |
| ORPROC | Major operating room ICD-9-CM procedure indicator | 2008-2015 Q3 | Core | Q1Q3 Dx_Pr_Grps (not in Q4) |
| PAY1 | Expected primary payer, uniform | 1988-2020 | Core | Core |
| PAY1_N | Expected primary payer, nonuniform | 1988-1997 | Core | |
| PAY1_X | Expected primary payer, as received from data source | 1998-2011 | Core | |
| PAY2 | Expected secondary payer, uniform | 1988-2011 | Core | |
| PAY2_N | Expected secondary payer, nonuniform | 1988-1997 | Core | |
| PAY2_X | Expected secondary payer, as received from data source | 1998-2011 | Core | |
| PCCHPRn | Physician 1 number (synthetic) | 1988-1997 | Core | |
| PCLASSn | Procedure Classes Refined for ICD-10-PCS procedure codes | 2005-2015 Q3; 2019-2020 | Dx_Pr_Grps | Q1Q3 Dx_Pr_Grps (not in Q4) |
| PCLASS_ORPROC | Major operating room ICD-10-PCS procedure indicator | 2019-2020 | Core | |
| PCLASS_VERSION | Version of the Procedure Classes Refined for ICD-10-PCS procedure codes | 2019-2020 | DX_PR_GRPS | |
| PL_NCHS | Patient Location: NCHS Urban-Rural Code | 2013-2020 | Core | Core |
| PL_NCHS2006 | Patient Location: NCHS Urban-Rural Code, 2006 | 2007-2012 | Core | |
| PL_UR_CAT4 | Patient Location: Urban-Rural 4 Categories | 2003-2006 | Core | |
| PointOfOriginUB04 | Point of origin for admission or visit, UB04 standard coding | 2007-2011 | Core | |
| PointOfOrigin_X | Point of origin for admission or visit, as received from source | 2007-2011 | Core | |
| PRn | ICD-9-CM Procedure | 1988-2015 Q3 | Core | Q1Q3 Dx_Pr_Grps (not in Q4) |
| PRCCSn | Clinical Classifications Software (CCS) for ICD-9-CM Procedures | 1998-2015 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 | 2019-2020 | DX_PR_GRPS | Q1Q3 Dx_Pr_Grps (not in Q4) |
| PRCCSR_VERSION | Version of the Clinical Classifications Software Refined (CCSR) for ICD-10-PCS procedure codes | 2019-2020 | DX_PR_GRPS | |
| PRDAYn | Number of days from admission to procedure n | 1988-2020 | Core | Q1Q3 Dx_Pr_Grps (not in Q4) |
| PRMCCSn | Multi-Level CCS for ICD-9-CM Procedures | 2009-2015 Q3 | Dx_Pr_Grps | Q1Q3 Dx_Pr_Grps (not in Q4) |
| PROCESS | HCUP processing identification record number | 1988-1997 | Core | |
| PRSYS | Procedure coding system | 1988-1997 | Core | |
| PRVER | Procedure codes ICD version indicator | 2015-2017 | Core | Q1Q3 and Q4 Dx_Pr_Grps |
| PRVn | Validity Flag: Procedure n | 1988-1997 | Core | |
| RACE | Race/ethnicity of patient | 1988-2020 | Core | Core |
| S_DISC_S | Number of sample discharges in STRAT_ST | 1988-1997 | Hospital | |
| S_DISC_U | Number of discharges in the sample for the stratum | 1988-2020 | Hospital | Hospital |
| S_HOSP_S | Number of sample hospitals in STRAT_ST | 1988-1997 | Hospital | |
| S_HOSP_U | Number of hospitals in the sample for the stratum | 1988-2020 | Hospital | Hospital |
| SEQ | Sequence number | 1988-1997 | Core | |
| SEQ_SID | HCUP SID sequence number | 1993-1997 | Core | |
| SERVICELINE | Service line based on ICD-9 codes | 2014-2015 Q3 | Core | Q1Q3 Dx_Pr_Grps (not in Q4) |
| SEX | Sex of the patient | 1988-1997 | Core | |
| ST_BEDSZ | Bedsize category | 1988-1992 | Hospital | |
| ST_OWNER | Ownership/control category | 1988-1992 | Hospital | |
| ST_REG | Hospital census region | 1988-1992 | Hospital | |
| STRAT_ST | Stratum for state-specific weights | 1988-1997 | Hospital | |
| STRATUM | Stratum used to post-stratify hospital | 1988-1997 | Hospital | |
| SURGID_S | Synthetic primary surgeon number | 1988-2000 | Core | |
| TOTAL_DISC | Number of hospital discharges in the sample | 1998-2020 | Hospital | Hospital |
| TOTCHG | Total charges, cleaned | 1988-2020 | Core | Core |
| TOTCHG_X | Total charges, as received from data source | 1988-2011 | Core | |
| TOTDSCHG | Total hospital discharges | 1988-1997 | Hospital | |
| TRAN_IN | Indicator of a transfer into the hospital | 2008-2020 | Core | Core |
| TRAN_OUT | Transfer out indicator | 2010-2020 | Core | Core |
| YEAR | Calendar year | 1988-2020 | Core, Hospital | Core, Hospital |
| ZIPINC | Median household income for patient's ZIP Code (based on 1999 demographics) | 1998-2002 | Core | |
| ZIPINC_QRTL | Median household income for patient's ZIP Code (based on current year) | 2003-2020 | Core | Core |
| ZIPINC4 | Median income for patient's ZIP Code (4 categories) | 1988-1997 | Core | |
| ZIPINC8 | Median income for patient's ZIP Code (8 categories) | 1988-1997 | Core |
Note: Data elements change frequently and are only current as of the date generated.
Abbreviations: DX, diagnosis; PR, procedure; Q1, discharge quarter 1; Q3, discharge quarter 3; Q4, discharge quarter 4.
*Beginning with 2017, external cause codes are at the end of the ICD-10-CM diagnosis array.
HCUP NIS - Data dictionary