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Mdlinx Review  

MDLinx is an online service for physicians and healthcare professionals by M3 USA Corporation. MDLinx was founded in 1999 and was fully acquired by M3 in 2016. M3 USA Corporation was founded in 2000, aiming to change the medical arena by making full use of technology platforms and services. The three Ms stands for Medicine, Media, and Metamorphosis. 

Daniel Williams Reviewer

Andrew: Andrew is one of our reviewers who’s been with HuginX the longest. With a background in membership support at one of the largest survey companies, Andrew has a lot of inside knowledge of the Market Research industry and has helped us refine our reviewing criteria. When Andrew is not working with reviews, he likes to go hiking with his dog Charlie. 

M3’s mission is to use technology to help people live longerhealthier lives and reduce costs in healthcare.

Is MDLinx a legit survey site?  

Definitely legit. M3 USA Corporation aims to connect diverse areas of the healthcare community through the internet to improve people’s health, reduce unnecessary medical costs, and transform the technologies and media solutions that its clients implement as part of the process. M3 USA is a member of the Council of American Survey Research Organizations, the industry’s leading quality benchmark. MDLinx also provides services to industry sponsors that wish to promote their services to certain medical professionals. 

How do Survey Sites operate?

New to survey sites? Here is a quick guide to 10 key steps they take when inviting participants to market research projects.


Survey Sites explained in 10 steps

Looking to join a Survey Site? Here are the key steps in the process applicable to most sites:

1. Client requests survey participants

A client requests survey participants for a market research project.

2. A target-group is selected

Based on the profiling information you have provided, a sub-set of panelists will be eligible and selected to participate.

3. Participants are invited

Panelists with qualifying profiles will be invited to participate, usually through email invitation or push notification on mobile.

4. Screening of participants

Upon clicking the invitation link, you'll go through a set of screening questions before you are fully qualified to participate.

5. Participants take the survey

As a participant you'll answer a number of questions. The survey could be about anything from consumer brands and entertainment to healthcare and business topics.

6. Your answers are checked

After you have answered all the questions diligently, you'll get a confirmation if your submission has been approved. You'll sometimes need to wait for a researcher to have gone through your submission before you get a confirmation.

7. Your reward is allocated

After the survey, you'll also get a confirmation on the incentive you have earned. The rewards vary from site to site, but is often based on virtual points or simply a cash amount for each survey.

8. Meeting the redemption threshold

Most survey sites don't allow you to withdraw your reward straight away, but will require you to earn a minimum amount before withdrawing your hard earned reward.

9. Filling out your payment information

If you opt to receive your reward through PayPal or bank transfer, remember that your name and address must also match your profile on the survey site.

10. Redeeming your reward

Once you meet the redemption threshold you can withdraw your reward, which is usually in the form of PayPal credits, bank-transfer, Amazon-vouchers, or other types of gift-cards.

Survey Sites Guide

Data Privacy: Any reason for concern?  

MDLinx uses a range of measures to safeguard your personal information. Your personal information is used to facilitate easy registration of the company’s services offered to you, but all information is taken in aggregate form to protect your privacy. MDLinx will not disclose personally identifiable information gathered from you to any third party through the site. Your email address will not be sold to a third party if you sign up to be included on the platform’s email distribution list. Your personal contact information, such as email, phone number, or mailing address, will never be provided to advertisers without your consent. Moreover, your sensitive information will not be used without your consent unless it has been anonymized or aggregated or a legal obligation such as a court order requiring the disclosure. 

How to get started  

MDLinx Survey App is a mobile survey platform for physicians. You must register to have full access to MDLinx services. To qualify, you must be a physician or a healthcare professional. If you have an account with one of the MDLinx affiliates, just log in instead of registering. To join, provide your name, email address, zip code, and other personal information, such as your speciality and profession. MDLinx market research gives direct access to physicians’ panels in the US, Japan, and Korea and access via partnerships to physicians’ panels in other countries.  

What about the survey experience?  

The services offer electronic newsletters sent via email providing specific information on selected topics and industry-sponsored programs, including an invitation to participate. Other services are pre- and post-marketing surveys and quiz content, where the responses of registered users will be recorded to provide the service. Members who participate agree that their name, speciality, profession, NPI, Zip Code, and answers to questions can be shared with the industry sponsor. The profile information matches up with defined research specifications to determine which studies you will be invited to participate in. 

How much can you make on MDLinx?  

The compensation amount for each research opportunity will be stated in the invitation email. Compensation will be provided in your M3 wallet and is typically available after 2 business days. Participation completed in in-person studies or at an M3 facility or partner may be compensated at the end of the event. Honoraria is typical $2 to $3 per minute but varies with the topic. 

When you use the Career Center (CV), you can search for jobs, receive emails about future job postings, and employers directly contact you for job offers. If you select “apply” for the advertised job, your information from the CV will be shared by the Hiring Organization and Affiliate PracticeMatch. 

Healthcare Survey Sites

Top Rated
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Medscape Review Summary
Medscape is one of the largest healthcare portals globally, and as a vetted physician, you'll be able to take selected surveys matching your medical niche. Taking surveys through Medscape on relevant medical topics can be rewarding both professionally and financially.
Survey Experience
Survey Matching
Incentive Level
Redeeming Rewards
  • Interesting medical topics
  • Surveys that match well with the medical niche
  • Rewards as promised
  • Surveys may not always be mobile-friendly
  • This is a long open-ended question that can take some time to answer.
  • Screening out too often is not a pleasant experience.
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Sermo Review Summary
You can earn money by participating in paid medical research studies and helping your peers with their current problems. By joining Sermo, you can improve your medical practice and expand your professional network.
Survey Experience
Survey Matching
Incentive Level
Redeeming Rewards
  • Physicians can earn extra money
  • Participate in the most recent medical developments
  • Maintain current knowledge while earning money
  • Surveys of various kinds
  • Slow cash-out
  • The survey interface could be more intuitive
  • Lots of verification and screening questions
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Brand Institute
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Brand Institute Review Summary
Brand Institute is a great option for anyone looking to earn extra cash through online surveys. The cash payments, low payout threshold, fair compensation, and interesting topics make it an attractive choice for those looking to share their opinions and earn rewards.
Survey Experience
Survey Matching
Incentive Level
Redeeming Rewards
  • Cash payments
  • Low payout threshold
  • Fair compensation
  • Interesting topics
  • Hard to qualify
  • Infrequent suvey invitaitons
  • Time-consuming surveys
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Curizon Review Summary
Curizon is part of Toluna, which is one of the largest market research providers in the world. This is a panel exclusive to healthcare professionals such as medical doctors and registered nurses, and the incentive level will be much higher than for standard consumer surveys. Honoraria depends on the complexity of the survey and medical field, but you can expect to earn upwards of $100 per hour.
Survey Experience
Survey Matching
Incentive Level
Redeeming Rewards
  • Exclusive panel community for healthcare professionals
  • The panel is run by a legit market research company
  • Honoraria are much more generous than standard consumer surveys
  • Surveys can be done on the go without any commitments
  • Survey frequency can be hard to predict
  • Respondents can be screened out if not fitting with the exact target-group
  • Complex survey topics require deep concentration
  • The payout process can take several weeks (for amounts above $100)
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e-Rewards Medical Review Summary
e-Rewards Medical is a niche survey site for healthcare professionals. It's an invitation-only panel, and physicians will be verified through their DEA number. The honorarium per survey is determined based on survey length and medical speciality.
Survey Experience
Survey Matching
Incentive Level
Redeeming Rewards
  • Market level honoraria
  • Surveys are relevant to the medical profession
  • Valuable contributions to medical research
  • Legit market research company
  • Long open-ended questions
  • Frequent survey invitations
  • It can be hard to qualify

What can prevent me from cashing out?  

Survey invitations are only intended for the account holder unless expressly stated otherwise in the invitation itself. Registered members must be honest when posting their credentials in the Career Center. Consequently, you should not put the information you do not want to be made public in your advertisement or application.  


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Disclosure: While HuginX is editorially independent, we may earn commissions on sign-up links.


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MDLinx Review Summary
The M3 Group provides healthcare and life sciences services, including market research, ethical drug promotion, clinical development, job recruitment, and clinic appointment services. MDLinx is part of the M3 Group of companies that provide internet services for physicians and other healthcare professionals worldwide.
Survey Experience
Survey Matching
Incentive Level
Redeeming Rewards
  • Simple profile questions
  • High standards of surveys
  • High qualifications required
  • Limited to physicians and healthcare professionals 

Specification: MDLinx

What can I earn?
Paid Gigs

Incentive Level
Payout Threshold
Reward Options
Cash Options
Who should consider joining?
Healthcare Professionals
How do I get started?
Open Registration
Web Browser
Mobile App
What company is behind this?




United States

City (HQ)

Fort Washington

MR Associations
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