Understanding the Medical Information Bureau (MIB)
How the Medical Information Bureau affects your life and health insurance applications.
What Is the Medical Information Bureau (MIB)?
The Medical Information Bureau, now known as MIB Group, Inc. or simply MIB, is a specialized information service used by life and health insurance companies in the United States and Canada. Unlike traditional credit bureaus that track financial behavior, MIB focuses on medical conditions, health history, and certain lifestyle factors that insurers use to evaluate risk when underwriting individual life, health, disability income, critical illness, and long-term care insurance policies.
Founded in 1902, MIB was created by a group of life insurance companies to help prevent fraud and misrepresentation in insurance applications. Over time, it evolved into a nationwide specialty consumer reporting agency that operates under the federal Fair Credit Reporting Act (FCRA). This legal classification gives consumers specific rights to access and dispute information in their MIB records, much like they can with credit reports.
How MIB Differs from Credit Bureaus
It’s important to understand that MIB is not a credit reporting agency in the traditional sense. While companies like Equifax, Experian, and TransUnion track payment history, debts, and creditworthiness, MIB collects and shares a different kind of data:
- Medical conditions reported during insurance applications (e.g., diabetes, heart disease, cancer)
- Hazardous avocations such as skydiving, scuba diving, or racing
- Previous insurance applications and underwriting outcomes
- Lab test flags (not specific results, but indicators of abnormal findings)
- Motor vehicle record information related to serious violations
MIB does not store full medical records, lab values, imaging results, or any information about your credit history. It also does not generate a numerical “score” like a FICO score. Instead, it maintains a coded record that alerts insurers to potential discrepancies or omissions in your current application compared to past applications.
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How MIB Works in Insurance Underwriting
When you apply for individually underwritten life or health insurance, the insurer may check with MIB as part of the underwriting process. Here’s how it typically unfolds:
- You complete an application and authorize the insurer to obtain information from various sources, including MIB.
- The insurer submits a request to MIB to see if a record exists for you.
- If a record exists, MIB provides a report in coded format that highlights medical conditions, hazardous activities, or other underwriting flags from previous applications.
- The insurer uses this information, along with your current application, medical exams, and other records, to assess your risk and determine eligibility, coverage limits, and premium rates.
The goal of MIB is not to deny coverage outright, but to help insurers place applicants in the appropriate risk category. By identifying inconsistencies—such as failing to disclose a past diagnosis or omitting a risky hobby—MIB helps reduce adverse selection and keeps premiums more stable for the broader pool of policyholders.
Who Uses MIB and Why?
MIB is used exclusively by its member insurance companies, which include many of the largest life, health, disability, and long-term care insurers in North America. These companies rely on MIB to:
- Verify the accuracy of information provided on new applications
- Identify potential misrepresentations or omissions that could affect risk assessment
- Support fair and consistent underwriting decisions across the industry
- Help prevent fraud, such as applying for multiple policies while concealing serious health conditions
According to industry estimates, MIB member companies issue the vast majority of individual life insurance policies and a large share of health and disability policies in the U.S. and Canada. This means that if you’ve ever applied for individual life or health insurance, there’s a good chance your information has been reported to MIB.
What’s in Your MIB Record?
If you have a MIB record, it generally includes the following types of information:
- Medical codes that correspond to specific diagnoses or conditions (e.g., cardiovascular disease, diabetes, mental health conditions)
- Hazardous avocation codes for activities that increase risk, such as aviation, deep-sea diving, or motor sports
- Previous inquiries from insurers that have accessed your MIB record
- Lab test flags indicating abnormal results, without revealing specific values
- Motor vehicle record flags for serious violations that may affect insurability
- Disability Income Record System (DIRS) information for those who have applied for disability income insurance
Importantly, MIB does not contain:
- Full medical records or doctor’s notes
- Specific lab values, imaging results, or pathology reports
- Any information about your credit history, debts, or payment behavior
- Employment history, income details, or criminal records (unless directly related to an insurance application)
Your Rights Under the Fair Credit Reporting Act
Because MIB is classified as a nationwide specialty consumer reporting agency under the FCRA, you have important legal rights:
- Right to a free annual report: You can request one free copy of your MIB record every 12 months.
- Right to additional free reports: If an insurer takes an adverse action against you (such as denying coverage or charging higher premiums) based in part on your MIB record, you’re entitled to a free copy of that report.
- Right to dispute inaccurate information: If you find errors in your MIB record, you can dispute them directly with MIB, and they must investigate and correct or remove inaccurate data.
- Right to know who accessed your record: Your MIB report will list which insurers have inquired about your record in recent years.
These protections apply to both U.S. and Canadian consumers, and MIB must comply with FCRA requirements for accuracy, fairness, and privacy.
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