About the Project |  FAQs |  Glossary |  Data Sources |  Bibliography |  Complete Indicator List

Indicator Details: Age of Patients
Data Sources
Stratification and Year Choices:


  View Data By:
  Chart Format

  Chart Colors

Select a state from the dropdown below


Filter By:

Sort By:

The population aged 65 years or older is primarily non-Hispanic white for the years analyzed. Only ~10% of Medicare patients are of any other race/ethnicity. Non-Hispanic whites continue to be the largest racial/ethnic group for every Medicare age category studied.
Chart Explanation: The chart shows on the y-axis (vertical line) the percentage of patients, and the x-axis (horizontal line) shows the age groups by year, gender, or race.
Because diagnoses for medical conditions are key to the charts shown in the CKD Surveillance System and they come from claims submitted by providers for the fee-for-service parts of Medicare, Part A (hospital care) and Part B (ambulatory care), we restrict our analysis sample to beneficiaries aged 65 years or older who have Parts A and B coverage for the entire calendar year and have at least 1 outpatient visit in the calendar year.

Between 20% and 25% of beneficiaries each year used Part C, managed care/Medicare Advantage plans, and are excluded since their care was paid on a capitated basis and claims with diagnoses are not available.

This indicator shows the demographic characteristics of the Medicare data used throughout this web site that are known risk factors for chronic kidney disease such as older race and non-white racial and ethnic groups.
Data SetMedicare National 5% Sample
Period Currently Available


Secondary (1) VariableAge at the end of the previous calendar year
Description of MeasureRace/ethnicity distribution within age categories of Medicare fee-for-service beneficiaries
Data SourceCenters for Medicare and Medicaid Services
Type of Data SourceAdministrative
Health Care System DataYes
Regional or National?National
Demographic GroupPatients aged 65 and older using fee-for-service Medicare
NumeratorPatients in denominator within specified race/ethnicity group
DenominatorPatients aged 65 or older with full-year Part A and B enrollment and at least one outpatient visit in the calendar year within specified age category.
Primary Data Source IndicatorRace/ethnicity

Suggested Citation:
Centers for Disease Control and Prevention. Chronic Kidney Disease Surveillance System—United States.
website. http://www.cdc.gov/ckd