Healthcare Cost and Utilization Project (HCUP) SID Variable Notes

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	Central Distributor SID: Description of Data Elements - All States This section describes how HCUP data elements are coded, restrictions on their use, their uniform values, and state-specific coding practices for all years and for all states.
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ADATE	Admission date
ADAYWK	Admission day of week
ADRG	All Patient Refined DRG
ADRGRISKMORTALITY	All Patient Refined DRG mortality risk
ADRGSEV	All Patient Refined DRG severity level
AGE	Age in years at admission
AGEDAY	Age in days (when age < 1 year)
AGEGROUP	Age Group
AGEMONTH	Age in months (when age < 11 years)
AHAID	AHA hospital identifier with the leading 6
AHOUR	Admission Hour
AMDC	All Patient Refined MDC
AMONTH	Admission month
ANESTH	Method of anesthesia
APGAR1	One-minute APGAR score
APGAR5	Five-minute APGAR score
ASCHED	Admission scheduled vs. unscheduled
ASOURCE	Admission source (uniform)
ASOURCEUB92	Admission source (UB-92 standard coding)
ASOURCE_X	Admission source (as received from source)
ATYPE	Admission type
AWEEKEND	Admission day is a weekend
AYEAR	Admission year
BILLTYPE	UB-92 bill type
BLOOD	Pints of blood furnished to the patient
BMONTH	Birth month
BWT	Birth weight in grams
BYEAR	Birth year
CCSMGNn	CCS-MHSA general category: diagnosis
CCSMSPn	CCS-MHSA specific category: diagnosis
CHARGE	Line item charges (as received from source)
CHGn	Detailed charges (as received from source)
CHRONBn	Chronic condition body system
CHRONn	Chronic condition indicator
CM_AIDS	AHRQ comorbidity measure: Acquired immune deficiency syndrome
CM_ALCOHOL	AHRQ comorbidity measure: Alcohol abuse
CM_ANEMDEF	AHRQ comorbidity measure: Deficiency anemias
CM_ARTH	AHRQ comorbidity measure: Rheumatoid arthritis/collagen vascular diseases
CM_BLDLOSS	AHRQ comorbidity measure: Chronic blood loss anemia
CM_CHF	AHRQ comorbidity measure: Congestive heart failure
CM_CHRNLUNG	AHRQ comorbidity measure: Chronic pulmonary disease
CM_COAG	AHRQ comorbidity measure: Coagulopathy
CM_DEPRESS	AHRQ comorbidity measure: Depression
CM_DM	AHRQ comorbidity measure: Diabetes, uncomplicated
CM_DMCX	AHRQ comorbidity measure: Diabetes with chronic complications
CM_DRUG	AHRQ comorbidity measure: Drug abuse
CM_HTN_C	AHRQ comorbidity measure: Hypertension (combine uncomplicated and complicated)
CM_HYPOTHY	AHRQ comorbidity measure: Hypothyroidism
CM_LIVER	AHRQ comorbidity measure: Liver disease
CM_LYMPH	AHRQ comorbidity measure: Lymphoma
CM_LYTES	AHRQ comorbidity measure: Fluid and electrolyte disorders
CM_METS	AHRQ comorbidity measure: Metastatic cancer
CM_NEURO	AHRQ comorbidity measure: Other neurological disorders
CM_OBESE	AHRQ comorbidity measure: Obesity
CM_PARA	AHRQ comorbidity measure: Paralysis
CM_PERIVASC	AHRQ comorbidity measure: Peripheral vascular disorders
CM_PSYCH	AHRQ comorbidity measure: Psychoses
CM_PULMCIRC	AHRQ comorbidity measure: Pulmonary circulation disorders
CM_RENLFAIL	AHRQ comorbidity measure: Renal failure
CM_TUMOR	AHRQ comorbidity measure: Solid tumor without metastasis
CM_ULCER	AHRQ comorbidity measure: Peptic ulcer disease excluding bleeding
CM_VALVE	AHRQ comorbidity measure: Valvular disease
CM_WGHTLOSS	AHRQ comorbidity measure: Weight loss
CPTCCSn	CC CPT
CPTDAYn	Number of days from admission to CPT
CPTHCPCS	Line item CPT-4/HCPCS procedure code (as received from source)
CPTM1_n	First CPT-4/HCPCS modifier
CPTM2_n	Second CPT-4/HCPCS modifier
CPTMod1	Line item CPT-4/HCPCS first modifier (as received from source)
CPTMod2	Line item CPT-4/HCPCS second modifier (as received from source)
CPTn	CPT/HCPCS procedure code
DCCHPRn	CCHPR: principal diagnosis
DDATE	Discharge date
DHOUR	Discharge Hour
DIED	Died during hospitalization
DISP	Disposition of patient
DISPUB04	Disposition of patient (UB-04 standard coding)
DISPUB92	Disposition of patient (UB-92 standard coding)
DISPUNIFORM	Disposition of patient (uniform)
DISP_X	Disposition of patient (as received from source)
DMONTH	Discharge month
DNR	Do not resuscitate indicator
DOB	Date of birth
DQTR	Discharge quarter
DRG	DRG in effect on discharge date
DRG10	DRG, version 10
DRG18	DRG, version 18
DRG24	DRG, version 24
DRGVER	DRG grouper version used on discharge date
DRG_NoPOA	DRG in use on discharge date, calculated without POA
DSHOSPID	Data source hospital identifier
DSNDX	Max number of diagnoses from source
DSNPR	Max number of procedures from source
DSNUM	Data source ID number
DSTYPE	Data source type
DXATADMITn	Diagnosis present at admission
DXCCSn	CCS: diagnosis
DXMCCSn	Multi-Level CC Diagnosis
DXPOAn	Diagnosis present on admission indicator
DXSYS	Diagnosis coding system
DXVn	Valitify Flag: Diagnosis
DXn	Diagnosis
DaysBetweenVisits	Number of days between visits
DaysBurnUnit	Days in burn care unit (as received from source)
DaysCCU	Days in coronary care unit (as received from source)
DaysICU	Days in medical/surgical intensive care unit (as received from source)
DaysNICU	Days in neonetal care unit (as received from source)
DaysPICU	Days in pediatric care unit (as received from source)
DaysShockUnit	Days in shock trauma unit (as received from source
DaysToEvent	Days from 'start date' to admission
ECCSMGNn	CCS-MHSA general category: E Code
ECODEn	E code
EDHOUR	Emergency department time of arrival prior to inpatient admission
EDYEAR	Emergency Department arrival year
E_CCSn	CCS: E Code
E_MCCSn	Multi-Level CC E Code
E_POAn	E code present on admission indicator
FEMALE	Indicator of sex
HCUP_ED	HCUP Emergency Department service indicator
HCUP_OS	HCUP Observation Stay service indicator
HCUP_SURGERY_BROAD	Revised HCUP_AS (PCLASSn=3 or 4, or broad definition)
HCUP_SURGERY_NARROW	Revised HCUP_AS (PCLASSn=4, or narrow definition)
HISPANIC_X	Hispanic ethnicity (as received from source)
HOSPBRTH	Indicator of birth in this hospital
HOSPID	HCUP hospital identification number
HOSPST	Hospital state postal code
HOSPSTCO	Hospital modified FIPS state/county code
HOSP_NPI	Hospital NPI
Homeless	Indicator that patient is homeless
HospitalUnit	Indicator that patient was discharged from a special unit within an acute care hospital (reported by source)
IDNUMBER	HCUP AHA ID number without the leading 6
INJURY	Injury diagnosis reported on record (1:DX1 is an injury; 2:DX2+ is an injury; 0:No injury)
INJURY_CUT	Injury by cutting or piercing (by E codes)
INJURY_DROWN	Injury by drowning or submersion (by E codes)
INJURY_FALL	Injury by falling (by E codes)
INJURY_FIRE	Injury by fire, flame or hot object (by E codes)
INJURY_FIREARM	Injury by firearm (by E codes)
INJURY_MACHINERY	Injury by machinery (by E codes)
INJURY_MVT	Injury involving motor vehicle traffic (by E codes)
INJURY_NATURE	Injury involving nature or environmental factors (by E codes)
INJURY_POISON	Injury by poison (by E codes)
INJURY_STRUCK	Injury from being struck by or against (by E codes)
INJURY_SUFFOCATION	Injury by suffocation (by E codes)
INTENSIVECARE	Indicator of type of intensive care received by patient (as received from source)
INTENT_ASSAULT	Injury by assault indicated on the record (by E codes)
INTENT_SELF_HARM	Intentional self harm indicated on the record (by diagnosis and/or E codes)
INTENT_UNINTENTIONAL	Unintentional injury indicated on the record (by E codes)
KEY	HCUP record identifier
LEVELCARE	Level of patient care (as received from source)
LOS	Length of stay (cleaned)
LOS_X	Length of stay (as received from source)
MARITALSTATUS	Patient's marital status
MARITALSTATUSUB04	Patient's marital status, UB-04 standard coding
MARITALSTATUS_X	Patient's marital status (as received from source)
MDBOARD1	Physician 1 licensing board (as received from source)
MDBOARD2	Physician 2 licensing board (as received from source)
MDC	MDC in effect on discharge date
MDC10	MDC, version 10
MDC18	MDC, version 18
MDC24	MDC, version 24
MDC_NoPOA	MDC in use on discharge date, calculated without POA
MDID_S	Attending physician number (synthetic)
MDNUM1_R	Physician 1 number (re-identified)
MDNUM1_S	Physician 1 number (synthetic)
MDNUM2_R	Physician 2 number (re-identified)
MDNUM2_S	Physician 2 number (synthetic)
MDNUM3_R	Physician 3 number (re-identified)
MDNUM4_R	Physician 4 number (re-identified)
MDNUMTYPE1	Physician 1 number type
MDNUMTYPE2	Physician 2 number type
MDSPEC1	Physician 1 specialty (as received from source)
MDSPEC2	Physician 2 specialty (as received from source)
MEDINCSTQ	Median household income state quartile for patient ZIP Code
MOMNUM_R	Mother's number (re-identified)
MRN_R	Medical record number (re-identified)
MRN_S	Medical record number (synthetic)
MULTINJURY	More than one injury diagnosis reported on record
NCHRONIC	Number of chronic conditions
NCPT	Number of CPT/HCPCS procedures on this record
NDX	Number of diagnoses on this record
NECODE	Number of E codes on this record
NEOMAT	Neonatal and/or maternal DX and/or PR
NPR	Number of procedures on this record
NREVCD	Number of revenue codes for this discharge
OBSERVATION	Time for observation services (as received from source)
ORPROC	Major operating room procedure indicator
OS_TIME	Observation stay time summed from UNITS
P7EDSRC_X	Condition Code P7, Direct Inpatient Admission from Emergency Room
PAY1	Primary expected payer (uniform)
PAY1_N	Primary expected payer, nonuniform
PAY1_X	Primary expected payer (as received from source)
PAY2	Secondary expected payer (uniform)
PAY2_X	Secondary expected payer (as received from source)
PAY3	Tertiary expected payer (uniform)
PAY3_X	Tertiary expected payer (as received from source)
PAYER1_X	Primary expected payer plan identifier (as received from source)
PAYER2_X	Secondary expected payer plan identifier (as received from source)
PCCHPRn	CCHPR: principal procedure
PCLASSn	Procedure class
PL_CBSA	Patient location: Core Based Statistical Area (CBSA)
PL_MSA1993	Patient location: Metropolitan Statistical Area (MSA), 1993
PL_NCHS2006	Patient Location: NCHS Urban-Rural Code (V2006)
PL_NHCS2006	Patient Location: NCHS Urban-Rural Code (V2006)
PL_RUCA	Patient location: Rural-Urban Commuting Area (RUCA) Codes
PL_RUCA10	Patient location: Rural-Urban Commuting Area (RUCA) Codes, ten levels
PL_RUCA10_2005	Patient location: Rural-Urban Commuting Area (RUCA) Codes, ten levels
PL_RUCA2005	Patient location: Rural-Urban Commuting Area (RUCA) Codes
PL_RUCA4	Patient location: Rural-Urban Commuting Area (RUCA) Codes, four levels
PL_RUCA4_2005	Patient location: Rural-Urban Commuting Area (RUCA) Codes, four levels
PL_RUCC	Patient location: Rural-Urban Continuum Codes(RUCC)
PL_RUCC2003	Patient location: Rural-Urban Continuum Codes(RUCC), 2003
PL_UIC	Patient location: Urban Influence Codes
PL_UIC2003	Patient location: Urban Influence Codes, 2003
PL_UR_CAT4	Patient Location: Urban-Rural 4 Categories
PL_UR_CAT5	Patient Location: Urban-Rural 5 Categories
PNUM_R	Person number (re-identified)
PNUM_S	Person number (synthetic)
PRCCSn	CCS: procedure
PRDATEn	Date of procedure
PRDAYn	Number of days from admission
PRMCCSn	Multi-Level CC Procedure
PRMONTHn	Month of procedure
PROCESS	HCUP-3 discharge processing ID number
PROCTYPE	Procedure type indicator
PRSYS	Procedure coding system
PRVn	Validity Flag: Procedure
PRYEARn	Year of procedure
PRn	Procedure
PSTATE	Patient State postal code
PSTCO	Patient state/county FIPS code
PSTCO2	Patient state/county FIPS code, possibly derived from ZIP Code
PointOfOriginUB04	Point of origin for admission or visit, UB-04 standard coding
PointOfOrigin_X	Point of origin for admission or visit, as received from source
PrimLang	Primary language of patient
RACE	Race (uniform)
RACE_X	Race (as received from source)
RATE	Line item rate (as received from source)
RDRG	Refined DRG
READMIT	Readmission
REVCDn	Revenue code (as received from source)
REVCHGn	Detailed charges for revenue code (as received from source)
REVCODE	Line item revenue code (as received from source)
SEQ_SID	HCUP-3 SID record sequence number
SEX	Sex
SPLIT_IPED	Split IP/ED records-single visit, from CAH
SURGID_S	Primary surgeon number (synthetic)
TMDXn	Time of onset: diagnosis
TOTCHG	Total charges (cleaned)
TOTCHG_X	Total charges (as received from source)
TOWN	Patient town of residence (as received from source)
TRAN_IN	Transfer in indicator
TRAN_OUT	Transfer out indicator
UNITS	Line item units (as received from source)
UNITn	Units of service (as received from source)
U_BLOOD	Utilization Flag: Blood
U_CATH	Utilization Flag: Cardiac Catheterization Lab
U_CCU	Utilization Flag: Coronary Care Unit (CCU)
U_CHESTXRAY	Utilization Flag: Chest X-Ray
U_CTSCAN	Utilization Flag: Computed Tomography Scan
U_DIALYSIS	Utilization Flag: Renal Dialysis
U_ECHO	Utilization Flag: Echocardiology
U_ED	Utilization Flag: Emergency Room
U_EEG	Utilization Flag: Electroencephalogram
U_EKG	Utilization Flag: Electrocardiogram
U_EPO	Utilization Flag: EPO
U_ICU	Utilization Flag: Intensive Care Unit (ICU)
U_LITHOTRIPSY	Utilization Flag: Lithotripsy
U_MHSA	Utilization Flag: Mental Health and Substance Abuse
U_MRT	Utilization Flag: Medical Resonance Technology
U_NEWBN2L	Utilization Flag: Nursery Level II
U_NEWBN3L	Utilization Flag: Nursery Level III
U_NEWBN4L	Utilization Flag: Nursery Level IV
U_NUCMED	Utilization Flag: Nuclear Medicine
U_OBSERVATION	Utilization Flag: Observation Room
U_OCCTHERAPY	Utilization Flag: Occupational Therapy
U_ORGANACQ	Utilization Flag: Organ Acquisition
U_OTHIMPLANTS	Utilization Flag: Other Implants
U_PACEMAKER	Utilization Flag: Pacemaker
U_PHYTHERAPY	Utilization Flag: Physical Therapy
U_RADTHERAPY	Utilization Flag: Radiology - Therapeutic and/or Chemotherapy Administration
U_RESPTHERAPY	Utilization Flag: Respiratory Services
U_SPEECHTHERAPY	Utilization Flag: Speech - Language Pathology
U_STRESS	Utilization Flag: Cardiac Stress Test
U_ULTRASOUND	Utilization Flag: Ultrasound
VisitLink	Visit linkage variable
YEAR	Calendar year
ZIP	Patient ZIP Code
ZIP3	Patient ZIP Code, first 3 digits
ZIPINC_QRTL	Median household income national quartile for patient ZIP Code
ZIP_S	Patient ZIP Code (synthetic)
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