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Master Beneficiary Summary File (MBSF) - Chronic Conditions Files



Our Master Beneficiary Summary File (MBSF) - Chronic Conditions files indicate whether individuals enrolled in Medicare have one or more of 27 chronic conditions.

Variables Summary

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

Chronic Conditions

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

Years Available

1999 - 2020

File Update Frequency

Information icon.


Data Dictionary Link

Visit the Data Documentation Page

NIA Data Partners Offering MBSF - Chronic Conditions


NIA Data Partners Not Offering MBSF - Chronic Conditions


Additional Resources