Illinois Medical Lien Law for Outpatient Providers (2026)

Illinois gives a statutory lien to a broad group of licensed practitioners and facilities, not just hospitals. Physicians, physical therapists and licensed or accredited surgery centers are covered by the Health Care Services Lien Act. The lien is limited: all health care liens together are capped at 40% of the patient's gross recovery, and each provider shares that pool with the others.

At a glance

Is there a lien law for outpatient providers?

Yes. Under 770 ILCS 23/10(a), every "health care professional" and "health care provider" that treats an injured person has a lien on the patient's claim for the provider's reasonable charges, up to the date damages are paid. Care covered by the Workers' Compensation Act and the Workers' Occupational Diseases Act is excluded.

The definitions in 770 ILCS 23/5 set who is covered:

• Health care professionals: individuals licensed as physicians, dentists, optometrists, naprapaths, clinical psychologists or physical therapists. Orthopedic surgeons, pain management physicians and neurologists are covered as licensed physicians. Physical therapists are named directly.
• Health care providers: licensed hospitals, licensed home health agencies, licensed ambulatory surgical treatment centers, ambulatory surgical treatment facilities accredited by one of the named accrediting bodies, licensed long-term care facilities and licensed EMS personnel.

Chiropractors are not named in the list, and imaging centers are not listed as a facility type. We could not confirm in a primary source whether a chiropractor counts as a "licensed physician" under the Act.

The Act replaced Illinois's older separate lien statutes, including the Hospital Lien Act, as noted in Wolf v. Toolie, 2014 IL App (1st) 132243.

How a lien is perfected

The lien notice must be in writing and state the patient's name and address, the date of injury, the provider's name and address, and the name of the party alleged to be liable. It must be served on both the patient and the party the claim is against, by registered or certified mail or in person. There is no filing with a county clerk.

The Act sets no fixed deadline, but timing matters. A good-faith payment to someone other than the lienholder, made before the notice is served, defeats the lien to the extent of that payment. Under 770 ILCS 23/20, the lien attaches to the verdict, judgment, award, settlement or compromise from the time the notice is served.

In Wolf v. Toolie, the appellate court upheld liens despite minor notice defects, such as a wrong address or notice received by the patient's attorney, where the parties had actual notice and were not harmed by the error.

Under 770 ILCS 23/30, the patient or a lienholder may petition the circuit court to decide the rights of all interested parties and enforce the liens.

Limits on what the provider is paid

• Reasonable charges. The lien covers only the provider's reasonable charges.
• 40% total cap. All health care liens together may not exceed 40% of the verdict, judgment, award, settlement or compromise.
• 20% and 20%. If the liens reach 40%, liens of health care professionals may not exceed 20% of the recovery and liens of health care providers may not exceed 20%. Any share one group does not use is reallocated within the 40%.
• One-third per license category. No single licensed category, such as physicians, may receive more than one-third of the recovery.
• Pro rata. Lienholders share proportionately within these limits.
• Only the lienholder can reduce. The statutory limits may be waived or reduced only by the lienholder.
• Gross, not net. In Wolf v. Toolie, the First District held the percentages apply to the full recovery, with attorney fees and costs not deducted first, rejecting the Fifth District's approach in Stanton v. Rea. Wolf also describes the Illinois Supreme Court's holding in Wendling v. Southern Illinois Hospital Services (2011) that lienholders do not pay a share of the patient's attorney fees under the common fund doctrine.
• Bundled charges. Charges billed at one all-inclusive rate are allocated among the providers and treated as separate liens (770 ILCS 23/10(d)).

Lien agreements and letters of protection

The Act does not bar a separate written agreement with the patient. Section 23/45 preserves a provider's right to pursue its reasonable charges "through all available means." A payer contract can still override the lien: a provider that agreed to accept an insurer's payment as payment in full can lose the lien, as described below.

The attorney's duty to pay the provider

Once notice is served, the lien attaches to the recovery (770 ILCS 23/20). If the recovery is paid through an annuity or similar arrangement, the party paying the patient must satisfy the lien before the annuity is set up.

ISBA Advisory Opinion 06-01 (2006) says the patient's attorney must hold settlement funds that a third party has a claim to separately, and must identify and pay the portion owed to a lien claimant, under Rule 1.15. The same opinion says the attorney may not personally guarantee payment of liens. ISBA opinions are advisory, not binding.

When health care liens total 40% or more, all attorney liens are capped at 30% of the recovery. That cap does not apply if an appeal is taken.

Health insurance, no-fault and billing the patient

The Act does not require a provider to bill the patient's health insurance before asserting a lien. In Turner v. Orthopedic & Shoulder Center, S.C., 2017 IL App (4th) 160552, the appellate court, following Barry v. St. Mary's Hospital Decatur (2016), read the Act as containing no such requirement and no rule forcing providers to accept health insurance payments as full satisfaction. The court noted that a 2012 bill that would have limited liens to insurance rates was amended to remove that language.

Network contracts are a different matter. In Turner, the provider's Blue Cross agreement made the insurer's discounted payment full payment. Because Blue Cross paid the bills at the contracted rate, the patient owed nothing more, so there was no valid lien. Asserting the lien was a breach of the payer contract, which the patient could enforce as a third-party beneficiary.

On billing the patient, 770 ILCS 23/45 says nothing in the Act limits a provider's right to pursue collection of its reasonable charges through all available means, and a lienholder may seek payment of reasonable charges that remain unpaid after its lien is satisfied. So the Act itself does not bar billing the patient for the part cut by the caps, subject to any payer contract.

Billed vs. paid medical damages

Illinois lets the patient present full billed charges. Under Arthur v. Catour (2005), as summarized in Wills v. Foster, 229 Ill. 2d 393 (2008), the patient may put the full billed amount into evidence with a foundation that it is reasonable. In Wills, the Illinois Supreme Court held that a trial court erred in reducing a verdict to what Medicare and Medicaid actually paid, and that defendants may not introduce evidence that the bills were settled for less. Defendants may still challenge whether the billed amounts reflect reasonable value through cross-examination and their own witnesses.

Recent changes

We could not confirm in a primary source whether the Health Care Services Lien Act was amended between 2023 and 2026.

What this means for your practice

• Physicians, physical therapists and licensed or accredited surgery centers hold a statutory lien. It depends on a complete written notice served on both the patient and the at-fault party, by certified or registered mail or in person.
• Notice timing matters: good-faith payments made before the notice is served reduce or defeat the lien.
• The 40% pool is shared. If total medical liens reach 40% of the gross settlement, each provider's payment comes out of a 20% professional pool or a 20% facility pool, pro rata, so the other liens on the case affect your payout.
• In-network status changes the picture. Under Turner, if the patient's insurer paid you at a contracted full-payment rate, the lien can disappear and asserting it can breach the payer contract.
• The Act allows pursuing reasonable charges left unpaid after the lien is satisfied, subject to payer contracts.
• Itemized, reasonable charges matter in Illinois because the patient can present full billed amounts at trial, which supports the recovery the lien pool is drawn from.

Sources

1. Health Care Services Lien Act, 770 ILCS 23/5, 23/10, 23/20, 23/30, 23/45
2. Wolf v. Toolie, 2014 IL App (1st) 132243
3. Turner v. Orthopedic & Shoulder Center, S.C., 2017 IL App (4th) 160552
4. Wills v. Foster, 229 Ill. 2d 393 (2008)
5. Illinois State Bar Association Professional Conduct Advisory Opinion 06-01 (2006)

How we verified: the statute text was checked against the 2025 Illinois Compiled Statutes on Justia, and the court opinions were read on illinoiscourts.gov. Research current as of November 12, 2026.