Voted Among Top Chicago,
Illinois Personal Injury Lawyers For 13 Years

Over $445 Million Recovered For Our Clients

Toll free 800-529-7285
Local (312) 857-7285

Chicago Personal Injury Lawyers

Deratany & Kosner: A Skilled Team of Chicago Attorneys Fighting to Protect the Rights of the Injured

At Deratany & Kosner, formerly The Deratany Firm, we are passionate legal advocates for our clients. We are relentless litigators, turning over every stone to provide each of our clients with the personalized attention they deserve and best legal representation in a court of law. Our Chicago personal injury attorneys are committed to ensuring each client receives the compensation and closure necessary after a serious accident.

$45 Million
Wrongful Death

$23.3 Million
Birth Injury

$19.55 Million
Foster Care Abuse

$14 Million
Adoption Negligence

Our Case Results Speak For Themselves

Personal injury and wrongful death cases can be complicated in Illinois. Choosing the right law firm should not be. Our firm has experience handling a variety of cases. We stand up for the rights of victims of foster care abuse and negligence and adoption abuse and negligence. We help victims of medical malpractice and nursing home negligence cases involving large hospitals and other facilities. We handle serious car accidents involving drunk drivers on Interstate 90 on the city’s South Side. Our firm is known for providing powerful legal representation to clients throughout the state.

If you have Deratany & Kosner on your side, rest assured your case will be in the hands of an experienced Chicago personal injury lawyer who puts clients’ needs first. We stand by our clients. We stand by our reputation, and we are guided by our passion for advocacy. That way, we can build a solid, successful legal strategy on your behalf. Call 800-529-7285 today for a free evaluation with one of our knowledgeable personal injury lawyers.

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Top Verdict: Top 50 Verdicts in Illinois in 2016 logo
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The National Trial Lawyers: Top 100 Trial Lawyers
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Jay Paul Deratany


Founder, Deratany & Kosner

Jay Paul Deratany is the founder of Deratany & Kosner. Receiving his law degree…

Michael Kosner



Michael Kosner, a graduate of the University of Miami Law School and the University…

Greg Olmstead



Greg Olmstead has been practicing law for 27 years, beginning with personal injury insurance…

Roosevelt Allen III



Roosevelt has successfully overcome the odds throughout his career in order to pursue his dream of practicing law. He…

Thomas Stewart



Thomas Stewart is an associate at Deratany & Kosner. Searching for a way to meaningfully…

Deirdre Willis


Paralegal/Office Manager

Deirdre Willis is a Chicago native who received a Bachelor of Science Degree from…


Deratany & Kosner brings more than 100 years of collective experience to the table protecting accident victims in Chicago and throughout Illinois. We have been voted among top Illinois law firms for 13 years, including each year between 2006 and 2014. Our experienced team of legal professionals has recovered more than $400 million in verdicts and settlements on behalf of clients.


Founding personal injury attorney Jay Paul Deratany has been voted an Illinois top lawyer and one of the top lawyers nationwide since 2007. Mr. Deratany is a passionate legal advocate for foster children who obtained a historic $45,000,000 award from a Cook County jury in a wrongful death claim for a child who died. He also obtained the then-largest verdict in Lake County history ($23,000,000) in a birth injury case.

In addition to his work inside the courtroom, attorney Deratany has published numerous articles in the Illinois Bar Journal and Foster Families Today and has been a guest on Fox & Friends, CNN and the O’Reilly Factor. He serves on numerous boards throughout the Chicago area. Attorney Deratany is also a successful entrepreneur and the owner of a historic hotel, The Kirby.

Our Case Results Speak For Themselves


Our legal team puts its extensive experiences and resources to work with the goal of giving clients the personal attention they deserve. We strive to get maximum compensation for clients involved in all types of accidents. At Deratany & Kosner, formerly The Deratany Firm, we have a diverse practice. Our firm focuses on representing injury victims facing serious injury or whose loved ones were injured or suffered a wrongful death in the following types of accidents:

  • Medical Malpractice – A healthcare provider may have failed you. We won’t. We will be with you every step of the way, until justice has been served.
  • Foster Care Abuse – Our attorneys are dedicated to standing up for the most vulnerable children in our society. If a child you know has been hurt, we can help.
  • Adoption Negligence – Deratany & Kosner represents foster families or adoptive families who suffered injury due to an agency that neglected to inform the parents of known dangers.
  • Nursing Home Abuse – When the stakes are high, you need an experienced trial attorney, someone who knows elder abuse cases. Let us take a stand on behalf of your loved one.
  • Birth Injury – Nothing is more painful for a family than a serious injury to a newborn baby. We will fight for the compensation and care your child needs.
  • Car Accidents – Your accident matters. Our attorneys relentlessly fight for clients facing significant losses in Chicago car accidents.
  • Truck Accidents – Our law firm knows how to take on the trucking companies, stand up for victims and help you recover.
  • Motorcycle Accidents – We are proud to represent injured bikers who have been hurt by the negligence of other motorists.
  • Premises Liability – Were you injured due to a property owner’s negligence? We handle slip and falls, negligent security cases and other cases involving serious injuries.
  • Other Injury Cases – We are guided by our passion for advocacy. We are committed to providing top representation for victims of all types of personal injury accidents.

Every case handled by Deratany & Kosner is unique. Each accident victim has particular needs and some injuries can’t be easily categorized. We leave nothing unexamined in pursuit of justice for each of our clients. Our attorneys are tough litigators who know how to find the right evidence. We have access to top medical experts and will scour police records to hold the responsible party accountable. We know how to play hardball with insurance companies that typically will try to keep payments to accident victims to a minimum.

Put your trust in Deratany & Kosner. Call 800-529-7285 today for a free case consultation with an experienced, Chicago personal injury lawyer. There is no obligation to contact us, and you pay us nothing unless you win.


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 with my medical malpractice case. Thanks to Deratany, 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 Chicago personal injury attorney Jay Paul Deratany and Deratany & Kosner to anyone looking for highly experienced and competent lawyers who are knowledgeable, especially in the area of personal injury and medical malpractice law.



Meet Jay Paul Deratany, Founder of Deratany & Kosner

Meet Michael Kosner, Partner at Deratany & Kosner

Meet Michael Kosner, Partner at Deratany & Kosner

Meet Greg Olmstead, Attorney at Deratany & Kosner

Meet Greg Olmstead, Attorney at Deratany & Kosner

Foster Children Need Help – Join the Fight for Foster Kids – Make a Difference

Chicago Personal Injury Attorney, Birth Injury, Medical Malpractice, Brain Injury

A newborn in NICU

Chicago Birth Injury Attorney Jay Paul Deratany, Illinois Personal Injury Lawyers

Hot water heater - negligence by the manufacturer led to a fatal scalding injury

Hot Water Heater – Chicago Personal Injury Attorney Jay Paul Deratany

Adoption Negligence - Child sits alone next to an open door

Adoption Negligence – Chicago Personal Injury Attorney Jay Paul Deratany

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