Our Master Beneficiary Summary File (MBSF) - Chronic Conditions files indicate whether individuals enrolled in Medicare have one or more of 27 chronic conditions.
The table below lists variable categories for and some key variables in MBSF - Chronic Conditions data. For a comprehensive list of variables, review the MBSF - Chronic Conditions data dictionary.
Beneficiary Identification Number
Acute Myocardial Infarction, Acquired Hypothyroidism, Alzheimer's Disease, Alzheimer's Disease and Related Disorders or Senile Dementia, Anemia, Asthma, Atrial Fibrillation, Benign Prostatic Hyperplasia, Breast Cancer, Cataract, Chronic Kidney Disease, Chronic Obstructive Pulmonary Disease, Colorectal Cancer, Depression, Diabetes, Endometrial Cancer, Glaucoma, Heart Failure, Hip/Pelvic Fracture, Hyperlipidemia, Hypertension, Ischemic Heart Disease, Lung Cancer, Osteoporosis, Prostate Cancer, Rheumatoid Arthritis / Osteoarthritis, Stroke,
Chronic Conditions Flags
End-Year Indicator, Mid-Year Indicator
Date that Beneficiary Met Criteria for Chronic Condition
Eligibility & Enrollment
Enrollment Source, Reference Year
1999 - 2020
File Update Frequency
Data Dictionary LinkVisit the Data Documentation Page
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