Sema4 is a patient-centered health intelligence company dedicated to advancing healthcare through data-driven insights. Our portfolio of information-driven genomic solutions, digital tools, and services enables providers to treat patients holistically during their generational health journey. With over 20 years of expertise in diagnosing rare disorders and diseases, and pioneering work in the identification of new disease-causing genes, our commitment to genetic disease detection, discovery, and diagnosis is based on sound science and is focused on enhancing patient care.
| Saturday | Closed |
| Sunday | Closed |
| Monday | 8AM to 8PM |
| Tuesday | 8AM to 8PM |
| Wednesday | 8AM to 8PM |
| Thursday | 8AM to 8PM |
| Friday | 8AM to 8PM |
333 Ludlow St Ste 8, Stamford, CT 06902
(Translated by Google) Cynthia was amazing on the phone and helped us solve our problems with the portal. Thank you for your excellent care and support! …
Great customer support team!
great customer service from chloe
This company owes Connecticut taxpayers money and answers.
Scammers on patient side and corporate side
The PAL location in Danbury has been awesome. Outstanding customer service and highly efficient!!!
(from a healthcare provider) Excellent customer service. Always able to get through to support on the phone and never left on hold.
First class service. They were a huge help keeping our residents and staff safe from COVID-19.
Can’t say enough positive things about their customer service! They were able to help us get results in a timely manner, were so polite and nice whenever I called. Highly recommend!
Hi,
My family and I have taken the Covid test this Tuesday but your Sema4 URL is …
I called this morning and Justin helped me out in a fantastic manner. He was able to quickly answer all of my questions and gave ways to find out how to get new updates on results.
Got tested more than a week ago and still haven’t got any results back even though I requested the results through their website 3 times already… what is the point of waiting 3 hours in line?
It’s been a week and have not been able to get my results nor have I been able to get in touch with anyone in this regards. It is very unfortunate after waiting in line for hours to get tested.
Was tested on 12/30/21 and have left 3 messages and still no results or call backs. Poor service and on top of that the people taking sample appear to be miserable
Sema 4 has been the worst experience for me, I’ve had a test that was suppose to take 10 days for results, and am currently still waiting going on week 5! Totally disgusted
Horrible!!!! HORRIBLE. I sent in my kit 3 months ago and I still don’t have any results. I email them, call them and no one responds to me. It’s scary that they have my families DNA. DO NOT CHOSE THIS COMPANY. THEY ARE HORRIBLE!!!!! It’s so scary.
Stay away.
Sent in the sample 10/15 or so. It is now 11/21 and still don’t have the …
I work in athletics and as you can imagine the constant need and changes that occur to meet covid protocols. I am amazed and grateful for not just their accommodation to meet our needs but the turn around time to ensure our safe …
Disappointing experience. Test results have taken over 3 weeks and treatment plans are on hold because of this. No one can provide an ETA of when we will receive the results, despite multiple follow ups.
Wonderful company doing amazing things with technology. Site is gorgeous with amazing views.
Only will do test. Will not answer questions if you have a positive result. Not helpful.
We had a genetic testing done by sema 4 based off Dr. Request. We were under the …
Apparently the holidays are more important than getting test results out to those tested on Wed, 12/22. Site is unwieldy to work with and have to login twice before it works correctly. Won’t go back.
Have used Sema4 several times for Covid testing of high level executives. Always a GREAT Experience. Very professional, extremely accommodating, and speedy results. I HIGHLY recommend the service!
When to the Stanford high school on Oct 6 2021, to have 2 children tested . The younger one was fine and the older one gave a fuss. The Jamaican lady says to the 5 year old . You’re a coward 3 times. If I didn’t have them lose w me it …
Absolutely top class service, the entire operation, top to bottom. Sema4 has been an outstanding partner. Supportive, responsive, fast turnaround. I cannot say enough about our experience. Highly recommended!!!!
Myself and my husband had the genetic testing done with Sema4. Quick bloodwork that was sent off and the results were back in no time. Very efficient and would highly recommend for “piece of mind” when trying to start a family. Top notch.
I cannot recommend this company enough, specifically the people I worked with: Phillipo and Dina. They have both gone above and beyond to be helpful and accommodating numerous times when dealing with personal and sensitive issues. They were …
Sema came through to help us during a stressful time. In-home testing at time when going to medical offices or public labs can be the cause of infection was extremely unsettling. The process is seamless – in home visit to gather samples and …
Sema4 has been an absolutely amazing partner in ensuring our university provides a safe environment for students to learn and grow in. Sema4 has handled the weekly COVID testing needs for our entire campus and has provided excellent service …
Beware! Stay away at all costs!! We requested Sema4 send residual DNA sample to a specialized lab for additional testing. Sema4 WAITED AN ENTIRE WEEK to send the sample, increasing our results timeline by 50% without explanation, care, …
I met Danielle RN last week. I was connected by family member bc I tested COVID pos on a rapid test on 8/3. Danielle arrived at my home 8/6 where I was quarantining solo away from my husband and 4 kids. …
This place is a joke for genetic testing and Covid testing. They are incompetent and have no clue what they’re doing. Avoid all Sema4 Covid testing sites cause every test you do is inconclusive. The also bailed on CT for testing which is why everyone is getting failed results back.
I would love to highlight an incredible employee by the name of Dan Vosk, I sure hope I’m spelling his name correctly. This kind man went above and beyond after office hours to make sure that we had a genetic counselor get back with us to …
Horrible customer service. Called to talk with the billing department about deferring my payment for the Sema4 Genetics test to cash, so they didn’t charge my insurance company $9000. *Hint, it’s only $249 if you do self-pay, and don’t go …
As an NW Cryobank employee, I have had to utilize Sema4 for a variety of laboratory processing. The Inside Sales Manager, Manuela Haist, has always been helpful whenever I ran into any issues I have faced involving requisitions, ordering, …
The group at Sema4 has been truly amazing. They offer best in class medical testing with results you can trust and a team that deeply cares about each patient. They really go above and beyond. I highly recommend for both businesses and individuals. They are complete professionals and leaders in their field.
We’ve used Sema4 multiple times over the past few months for COVID-19 virus testing. We received the test kits in a timely manner, we were assisted by a Sema4 nurse/technician via video conference calls when collecting samples and the …
Their COVID testing procedure was pretty well managed. Then it all fell apart. I was locked out of the account I had to create on their website, and as of writing this, it’s been five days with no word from them. I’ve submitted 4 support …
Nothing special about their genetic tests and takes forever to get results. And then they won’t release the results unless you talk to their genetic counselor. If you want to wait weeks for tests that take a couple of days, then this lab …
Horrible just Horrible if you have options please go somewhere else ! Ive been trying to get a hold of the billing department which at this point i think they do not exist, every time I call I get a lady name Kathy who seems to work in …
I have been with Sema4 from the beginning of COVID 19. Always available to help no matter the day or time. I have had nothing but support and assurance from the staff. Lori and both Emily’s were phenomenal. I would not hesitate to recommend their services to anyone.
Chloe at SemA4 was very helpful! It it wasn’t for her I would still be waiting on my doctors office to send in the info needed to complete my test. My doctors office was very rude to me and when I explained that to Chloe, she took over and …
Very impressive experience with Sema4. Love the customer service’s quick response regarding upon receiving my test result. There was some issue with my email address and I couldn’t receive the test result, after calling the customer …
UPDATE: Wanted to go back and update my rating from 1 to 4 based on follow up from a supervisor. Received a call from Caroline at SEMA4 who was great. She apologized for what happened to us, clarified some things, and overall remedied the …
Their billing department is rude and lack customer service as well as appropriate information. I wish I never used them. The lady tried to tell me before even looking up my information that they haven’t received anything from my insurance. …
I can not say enough things about the customer support here. Cinnelly P is an outstanding customer service representative. She was patient, understanding and went the extra mile to ensure that my doctor’s office had my results. She was …
I have been getting tested for COVID regularly and the Sema4 drive-up at Stamford High is top notch. The staff is professional and do a great job. I’ve never had to wait long to get tested and typically get my results the next day. Thank you for providing peace of mind during these stressful times!
This company is extremely shady. They sent me a bill, and when I called to pay it they asked for my insurance info. Fast forward a couple months, they’ve sent my insurer claims for thousands of dollars, and they already received from my …
Absolutely awful company!! I’ve been trying to get my COVID results for over a week! I’ve sent multiple emails and called multiple times. The only answer I get is from a robot. I’ve tried to log into my account but because of an error they …
It is convenient to have free access to covid testing during these times; however, Sema4 could do a better job with speediness getting results to patients. Three times I have had to contact Sema4 for my family members. No one seems to know …
Took a Covid Test at Veterans Park in Norwalk CT on December 18th and I have not received my results back. I heard it happened to another friend of mine too for the same site. Sema 4 had both my email address and phone number. Good thing I …
Had a positive experience. My doctor ordered the testing and we got the results back quickly. Everything went through my insurance company and my doctor, we didn’t have to lift a finger. There was a number of calls I had to make as it took …
My first experience with Sema4 for basic genetic testing went well as expected, however, when further testing of my parents was needed, everything went down hill. It has been 2.5 months and I still have not been able to meet with anyone to …