Protecting The Rights Of The
Injured And Abused

At Deratany & Kosner, our team of skilled attorneys have over 100 years of combined experience, helping injured and abused victims in the Chicago area get the compensation they deserve. Our litigators hold abusers and those guilty of negligence accountable, earning our injured clients more than a half-billion dollars in total compensation. Let us help you get the money you deserve with a zealous advocate leading your case.

Michael Kosner and Jay Paul Deratany

Medical Malpractice

Child Abuse And Negligence

Social Services Negligence

Personal Injury

Our Chicago Lawyers Aggressively Advocate For

Our Clients And Seek Justice For Their Injuries
The legal professionals at Deratany & Kosner
The legal professionals at Deratany & Kosner

Our Lawyers Break Barriers To Get Our Clients
The Justice They Deserve

When you find yourself injured after a serious accident or at the hands of your doctor or caregiver, get the help you need to recover financially with Deratany & Kosner. Our team helps people injured in a wide range of ways and has earned a reputation for taking on serious and complex cases. Our attorneys have the knowledge and skill to pursue those responsible for acts of medical malpractice, serious motor vehicle accidents, workplace injuries, animal attacks and many others.

Our four lawyers have 100 combined years of legal experience that they will leverage for your case, focusing their efforts on accomplishing your goals so that you can get the money you need to recover medically and financially.

Advocating For Victims Of
Abuse And Negligence

Unfortunately, many people find themselves harmed by the very people who were supposed to be caring for them, whether they’re nursing home, foster care or social service workers. When one of these trusted people abuses or neglects those they are responsible for, our lawyers take them to court to hold them responsible for their actions.

Our team relentlessly and aggressively pursues abusers to bring them to justice, forcing them to pay for what they have done and helping our clients move toward the road to recovery. If you have been harmed in this way, our attorneys can help you. They will be there every step of the way, providing you with personalized attention as they navigate your case.

Our Litigators And Staff

Jay Paul Deratany

Jay Paul Deratany


Michael Kosner

Michael Kosner

Greg Olmstead

Greg Olmstead

Thomas Stewart

Thomas Stewart

Deirdre Willis

Deirdre Willis

Senior Paralegal
Erin Welsh

Erin Welsh


Why You Should Choose
Deratany & Kosner

Our legal team puts its extensive experience and resources to work for all types of cases. Our lawyers leave nothing unexamined in their pursuit of justice for each of our clients. They work with top medical experts and scour police records to hold the responsible parties accountable.

Our attorneys know how to play hardball with insurance companies to get maximum compensation for our clients. Let them help you or a loved one get justice after a serious injury in any of these types of accidents and more.

Testimonials From Our Clients

“I was referred to Jay Paul Deratany by a friend after my son was born with a severe birth injury causing cerebral palsy. His firm was very compassionate and helped me with my medical malpractice case. Thanks to Deratany & Kosner, I not only received significant compensation for my family, but he also taught me about the law and guided me through each step of my case. I would strongly recommend Deratany & Kosner to anyone looking for highly experienced incompetent lawyers, especially in the area of personal injury and medical malpractice law.”
–John C.

“I brought a case to Mike and Jay a couple of years ago. No police report or solid record of the injury. In spite of the tough facts, they got an incredible result and a very high settlement! Professional and responsive at every turn, and not afraid to go to trial if they need to. These guys are the real deal!”

– Daniel M.

“Working with Jay Deratany has been an absolute pleasure. If you’re looking for a personal injury attorney, a medical malpractice attorney, or a car accident attorney in Chicago… I HIGHLY recommend them!”

$45 Million Award:

Social Service Negligence and Wrongful Death

$35 Million Settlement:

Social Service Neglect

$23.3 Million Award:

Hospital Negligence

$14.75 Million Settlement:

Hospital Negligence

$10.7 Million Award:

Personal Injury/Wrongful Death

Let Our Team Be Your Advocates

As They Zealously Represent You .