For most files, a table of variables will display below, with links to the variable definitions. If no table displays, or if you need additional information for a specific variable, please see the CCW website. Data documentation is available for all files and codebooks for many.

If you are unable to locate the information you need, please contact ResDAC.

CCW Codebook - MBSF Base A/B/C/D

CCW Record Layout - MBSF Base A/B/C/D

Base

SAS Name Variable Name
BENE_ID Encrypted CCW Beneficiary ID
BENE_ENROLLMT_REF_YR Reference Year (Base)
ENRL_SRC Enrollment Source
SAMPLE_GROUP Medicare Sample Group Indicator
ENHANCED_FIVE_PERCENT_FLAG Enhanced Medicare 5% Sample Indicator
CRNT_BIC_CD Current Beneficiary Identification Code
STATE_CODE State code for beneficiary (SSA code)
COUNTY_CD County code for beneficiary (SSA code)
ZIP_CD Zip code for beneficiary
STATE_CNTY_FIPS_CD_01 State and county FIPS code - January
STATE_CNTY_FIPS_CD_02 State and county FIPS code - February
STATE_CNTY_FIPS_CD_03 State and county FIPS code - March
STATE_CNTY_FIPS_CD_04 State and county FIPS code - April
STATE_CNTY_FIPS_CD_05 State and county FIPS code - May
STATE_CNTY_FIPS_CD_06 State and county FIPS code - June
STATE_CNTY_FIPS_CD_07 State and county FIPS code - July
STATE_CNTY_FIPS_CD_08 State and county FIPS code - August
STATE_CNTY_FIPS_CD_09 State and county FIPS code - September
STATE_CNTY_FIPS_CD_10 State and county FIPS code - October
STATE_CNTY_FIPS_CD_11 State and county FIPS code - November
STATE_CNTY_FIPS_CD_12 State and county FIPS code - December
AGE_AT_END_REF_YR Age of beneficiary at end of year
BENE_BIRTH_DT Beneficiary Date of Birth
VALID_DEATH_DT_SW Valid Date of Death Switch
BENE_DEATH_DT Beneficiary Date of Death
SEX_IDENT_CD Sex
BENE_RACE_CD Beneficiary Race Code (Base)
RTI_RACE_CD Research Triangle Institute (RTI) Race Code
COVSTART Medicare Coverage Start Date
ENTLMT_RSN_ORIG Original Reason for Entitlement Code
ENTLMT_RSN_CURR Current Reason for Entitlement Code
ESRD_IND End-Stage Renal Disease (ESRD) Indicator
MDCR_STATUS_CODE_01 Medicare Status Code - January
MDCR_STATUS_CODE_02 Medicare Status Code - February
MDCR_STATUS_CODE_03 Medicare Status Code - March
MDCR_STATUS_CODE_04 Medicare Status Code - April
MDCR_STATUS_CODE_05 Medicare Status Code - May
MDCR_STATUS_CODE_06 Medicare Status Code - June
MDCR_STATUS_CODE_07 Medicare Status Code - July
MDCR_STATUS_CODE_08 Medicare Status Code - August
MDCR_STATUS_CODE_09 Medicare Status Code - September
MDCR_STATUS_CODE_10 Medicare Status Code - October
MDCR_STATUS_CODE_11 Medicare Status Code - November
MDCR_STATUS_CODE_12 Medicare Status Code - December
BENE_PTA_TRMNTN_CD Part A Termination Code
BENE_PTB_TRMNTN_CD Part B Termination Code
BENE_HI_CVRAGE_TOT_MONS Part A Months Count
BENE_SMI_CVRAGE_TOT_MONS Part B Months Count
BENE_STATE_BUYIN_TOT_MONS State Buy-In Coverage Count
BENE_HMO_CVRAGE_TOT_MONS HMO Coverage Count
PTD_PLAN_CVRG_MONS Months of Part D Coverage
RDS_CVRG_MONS Months of Retiree Drug Subsidy Coverage
DUAL_ELGBL_MONS Months of Dual Eligibility
MDCR_ENTLMT_BUYIN_IND_01 Medicare Entitlement/Buy-In Indicator - January
MDCR_ENTLMT_BUYIN_IND_02 Medicare Entitlement/Buy-In Indicator - February
MDCR_ENTLMT_BUYIN_IND_03 Medicare Entitlement/Buy-In Indicator - March
MDCR_ENTLMT_BUYIN_IND_04 Medicare Entitlement/Buy-In Indicator - April
MDCR_ENTLMT_BUYIN_IND_05 Medicare Entitlement/Buy-In Indicator - May
MDCR_ENTLMT_BUYIN_IND_06 Medicare Entitlement/Buy-In Indicator - June
MDCR_ENTLMT_BUYIN_IND_07 Medicare Entitlement/Buy-In Indicator - July
MDCR_ENTLMT_BUYIN_IND_08 Medicare Entitlement/Buy-In Indicator - August
MDCR_ENTLMT_BUYIN_IND_09 Medicare Entitlement/Buy-In Indicator - September
MDCR_ENTLMT_BUYIN_IND_10 Medicare Entitlement/Buy-In Indicator - October
MDCR_ENTLMT_BUYIN_IND_11 Medicare Entitlement/Buy-In Indicator - November
MDCR_ENTLMT_BUYIN_IND_12 Medicare Entitlement/Buy-In Indicator - December
HMO_IND_01 HMO Indicator - January
HMO_IND_02 HMO Indicator - February
HMO_IND_03 HMO Indicator - March
HMO_IND_04 HMO Indicator - April
HMO_IND_05 HMO Indicator - May
HMO_IND_06 HMO Indicator - June
HMO_IND_07 HMO Indicator - July
HMO_IND_08 HMO Indicator - August
HMO_IND_09 HMO Indicator - September
HMO_IND_10 HMO Indicator - October
HMO_IND_11 HMO Indicator - November
HMO_IND_12 HMO Indicator - December

Part C

SAS Name Variable Name
PTC_CNTRCT_ID_01 Part C Contract Number - January
PTC_CNTRCT_ID_03 Part C Contract Number - March
PTC_CNTRCT_ID_04 Part C Contract Number - April
PTC_CNTRCT_ID_05 Part C Contract Number - May
PTC_CNTRCT_ID_06 Part C Contract Number - June
PTC_CNTRCT_ID_07 Part C Contract Number - July
PTC_CNTRCT_ID_08 Part C Contract Number - August
PTC_CNTRCT_ID_09 Part C Contract Number - September
PTC_CNTRCT_ID_10 Part C Contract Number - October
PTC_CNTRCT_ID_11 Part C Contract Number - November
PTC_CNTRCT_ID_12 Part C Contract Number - December
PTC_PBP_ID_01 Part C PBP Number - January
PTC_PBP_ID_02 Part C PBP Number - February
PTC_PBP_ID_03 Part C PBP Number - March
PTC_PBP_ID_04 Part C PBP Number - April
PTC_PBP_ID_05 Part C PBP Number - May
PTC_PBP_ID_06 Part C PBP Number - June
PTC_PBP_ID_07 Part C PBP Number - July
PTC_PBP_ID_08 Part C PBP Number - August
PTC_PBP_ID_09 Part C PBP Number - September
PTC_PBP_ID_10 Part C PBP Number - October
PTC_PBP_ID_11 Part C PBP Number - November
PTC_PBP_ID_12 Part C PBP Number - December
PTC_PLAN_TYPE_CD_01 Part C Plan Type Code - January
PTC_PLAN_TYPE_CD_02 Part C Plan Type Code - February
PTC_PLAN_TYPE_CD_03 Part C Plan Type Code - March
PTC_PLAN_TYPE_CD_04 Part C Plan Type Code - April
PTC_PLAN_TYPE_CD_05 Part C Plan Type Code - May
PTC_PLAN_TYPE_CD_06 Part C Plan Type Code - June
PTC_PLAN_TYPE_CD_07 Part C Plan Type Code - July
PTC_PLAN_TYPE_CD_08 Part C Plan Type Code - August
PTC_PLAN_TYPE_CD_09 Part C Plan Type Code - September
PTC_PLAN_TYPE_CD_10 Part C Plan Type Code - October
PTC_PLAN_TYPE_CD_11 Part C Plan Type Code - November
PTC_PLAN_TYPE_CD_12 Part C Plan Type Code - December

Part D

SAS Name Variable Name
PTD_CNTRCT_ID_01 Monthly Part D Contract Number - January
PTD_CNTRCT_ID_02 Monthly Part D Contract Number - February
PTD_CNTRCT_ID_03 Monthly Part D Contract Number - March
PTD_CNTRCT_ID_04 Monthly Part D Contract Number - April
PTD_CNTRCT_ID_05 Monthly Part D Contract Number - May
PTD_CNTRCT_ID_06 Monthly Part D Contract Number - June
PTD_CNTRCT_ID_07 Monthly Part D Contract Number - July
PTD_CNTRCT_ID_08 Monthly Part D Contract Number - August
PTD_CNTRCT_ID_09 Monthly Part D Contract Number - September
PTD_CNTRCT_ID_10 Monthly Part D Contract Number - October
PTD_CNTRCT_ID_11 Monthly Part D Contract Number - November
PTD_CNTRCT_ID_12 Monthly Part D Contract Number - December
PTD_PBP_ID_01 Monthly Part D Plan Benefit Package Number - January
PTD_PBP_ID_02 Monthly Part D Plan Benefit Package Number - February
PTD_PBP_ID_03 Monthly Part D Plan Benefit Package Number - March
PTD_PBP_ID_04 Monthly Part D Plan Benefit Package Number - April
PTD_PBP_ID_05 Monthly Part D Plan Benefit Package Number - May
PTD_PBP_ID_06 Monthly Part D Plan Benefit Package Number - June
PTD_PBP_ID_07 Monthly Part D Plan Benefit Package Number - July
PTD_PBP_ID_08 Monthly Part D Plan Benefit Package Number - August
PTD_PBP_ID_09 Monthly Part D Plan Benefit Package Number - September
PTD_PBP_ID_10 Monthly Part D Plan Benefit Package Number - October
PTD_PBP_ID_11 Monthly Part D Plan Benefit Package Number - November
PTD_PBP_ID_12 Monthly Part D Plan Benefit Package Number - December
PTD_SGMT_ID_01 Monthly Part D Market Segment Identifier - January
PTD_SGMT_ID_02 Monthly Part D Market Segment Identifier - February
PTD_SGMT_ID_03 Monthly Part D Market Segment Identifier - March
PTD_SGMT_ID_04 Monthly Part D Market Segment Identifier - April
PTD_SGMT_ID_05 Monthly Part D Market Segment Identifier - May
PTD_SGMT_ID_06 Monthly Part D Market Segment Identifier - June
PTD_SGMT_ID_07 Monthly Part D Market Segment Identifier - July
PTD_SGMT_ID_08 Monthly Part D Market Segment Identifier - August
PTD_SGMT_ID_09 Monthly Part D Market Segment Identifier - September
PTD_SGMT_ID_10 Monthly Part D Market Segment Identifier - October
PTD_SGMT_ID_11 Monthly Part D Market Segment Identifier - November
PTD_SGMT_ID_12 Monthly Part D Market Segment Identifier - December
RDS_IND_01 Part D Retiree Drug Subsidy Indicator - January
RDS_IND_02 Part D Retiree Drug Subsidy Indicator - February
RDS_IND_03 Part D Retiree Drug Subsidy Indicator - March
RDS_IND_04 Part D Retiree Drug Subsidy Indicator - April
RDS_IND_05 Part D Retiree Drug Subsidy Indicator - May
RDS_IND_06 Part D Retiree Drug Subsidy Indicator - June
RDS_IND_07 Part D Retiree Drug Subsidy Indicator - July
RDS_IND_08 Part D Retiree Drug Subsidy Indicator - August
RDS_IND_09 Part D Retiree Drug Subsidy Indicator - September
RDS_IND_10 Part D Retiree Drug Subsidy Indicator - October
RDS_IND_11 Part D Retiree Drug Subsidy Indicator - November
RDS_IND_12 Part D Retiree Drug Subsidy Indicator - December
DUAL_STUS_CD_01 Monthly Medicare-Medicaid dual eligibility code - January
DUAL_STUS_CD_02 Monthly Medicare-Medicaid dual eligibility code - February
DUAL_STUS_CD_03 Monthly Medicare-Medicaid dual eligibility code - March
DUAL_STUS_CD_04 Monthly Medicare-Medicaid dual eligibility code - April
DUAL_STUS_CD_05 Monthly Medicare-Medicaid dual eligibility code - May
DUAL_STUS_CD_06 Monthly Medicare-Medicaid dual eligibility code - June
DUAL_STUS_CD_07 Monthly Medicare-Medicaid dual eligibility code - July
DUAL_STUS_CD_08 Monthly Medicare-Medicaid dual eligibility code - August
DUAL_STUS_CD_09 Monthly Medicare-Medicaid dual eligibility code - September
DUAL_STUS_CD_10 Monthly Medicare-Medicaid dual eligibility code - October
DUAL_STUS_CD_11 Monthly Medicare-Medicaid dual eligibility code - November
DUAL_STUS_CD_12 Monthly Medicare-Medicaid dual eligibility code - December
CST_SHR_GRP_CD_01 Monthly cost sharing group under Part D low-income subsidy - January
CST_SHR_GRP_CD_02 Monthly cost sharing group under Part D low-income subsidy - February
CST_SHR_GRP_CD_03 Monthly cost sharing group under Part D low-income subsidy - March
CST_SHR_GRP_CD_04 Monthly cost sharing group under Part D low-income subsidy - April
CST_SHR_GRP_CD_05 Monthly cost sharing group under Part D low-income subsidy - May
CST_SHR_GRP_CD_06 Monthly cost sharing group under Part D low-income subsidy - June
CST_SHR_GRP_CD_07 Monthly cost sharing group under Part D low-income subsidy - July
CST_SHR_GRP_CD_08 Monthly cost sharing group under Part D low-income subsidy - August
CST_SHR_GRP_CD_09 Monthly cost sharing group under Part D low-income subsidy - September
CST_SHR_GRP_CD_10 Monthly cost sharing group under Part D low-income subsidy - October
CST_SHR_GRP_CD_11 Monthly cost sharing group under Part D low-income subsidy - November
CST_SHR_GRP_CD_12 Monthly cost sharing group under Part D low-income subsidy - December