Under Oklahoma law, a treating hospital or physician can place a lien on a personal injury recovery for unpaid medical charges (42 O.S. Section 43 for hospitals, Section 46 for physicians). Many liens are technically defective: filed in the wrong county, missing required notice, or unenforceable after the one-year deadline. Check each requirement before you pay a lien in full.
Medical liens are a collection problem in most cases, not a legal barrier. A lien is a statutory claim against part of your client’s recovery, not a right to seize the settlement outright (see Cornell Law School’s overview of lien law). Sections 43 and 46 of Title 42 contain attack points most providers ignore and most adjusters exploit. Work through this checklist before you finalize any settlement: a defective lien that survives unchallenged costs your client money, and one that fails can be eliminated or reduced to a fraction of the claimed amount.
The controlling strict construction principle: “Lien statutes are to be strictly confined within the ambit of the enactment that gave them birth.” Republic Bank & Trust Co. of Tulsa v. Bohmar Minerals, Inc., 1983 OK 29, 661 P.2d 521, 523. Apply that standard to every lien your client faces.
Quick Reference: Section 43 vs. Section 46
| Element | 42 O.S. Section 43 (Hospital) | 42 O.S. Section 46 (Physician / Professional) |
|---|---|---|
| Who can file | Hospitals; freestanding medical imaging facilities (MRI, CT, PET) in medically referred cases (2012 amendment) | Any physician or licensed Title 59 professional within the scope of practice |
| What attaches (Subsection A) | Any recovery or sum collected from the tortfeasor (liability coverage) | Any recovery from the tortfeasor |
| What attaches (Subsection B) | Monies payable by any insurer directly to the injured person | Monies payable by any insurer directly to the injured person |
| UM/UIM proceeds | Does not attach (Kratz v. Kratz, 1995 OK 63, 905 P.2d 753) | No specific holding; Kratz logic applies by analogy |
| Workers’ Compensation excluded | Yes, expressly | Yes, expressly (references Title 85A) |
| Inferior to an attorney’s lien | Yes, stated expressly in statute | Yes, stated expressly in statute |
| Filing/perfection requirement | None specified | Section 46(C): M&M lien docket, county clerk, county of principal office |
| Notice requirement | None specified | Registered/certified mail to tortfeasor, injured person, and attorney (if known) |
| Enforcement deadline | Not specified | 1 year after the physician becomes aware of the final judgment, settlement, or compromise |
Part 1: Hospital Liens Under 42 O.S. Section 43
Check 1: Is the Injury Covered by Workers’ Compensation?
Rule: Section 43 does not apply to Workers’ Compensation claims. Both Subsection A (lien against tortfeasor recovery) and Subsection B (direct insurer lien) expressly exclude WC claims.
Result: Lien fails as to WC recovery. If your case has both a WC component and a third-party tort claim, the Section 43 lien attaches to the tort recovery only. Do not allow the hospital to assert the lien against WC proceeds.
Check 2: Is the Provider Actually Eligible to File Under Section 43?
Rule: Section 43 covers hospitals. The 2012 amendment (Subsection C) extended it to freestanding medical diagnostic imaging facilities performing MRI, CT, or PET scans, but only in medically referred cases. Any other provider, including a standalone physician’s clinic, physical therapy center, chiropractor, or pharmacy, must use Section 46 with all of its perfection requirements instead.
Result: Lien fails if the provider is not a hospital or a qualifying imaging facility. Check the record for a referral before accepting a freestanding imaging center’s Subsection C claim.
Check 3: Does the Lien Claim Attach to UM/UIM Proceeds?
Rule: Hospital liens under Section 43 do not attach to UM/UIM proceeds, settled under Kratz, which expressly overruled prior contrary holdings. The lien attaches only to amounts collected from the tortfeasor’s liability carrier.
Result: Lien fails as to UM/UIM funds, though hospitals and their collection counsel routinely assert otherwise. Segregate the tortfeasor recovery from UM/UIM recovery in your settlement documentation and insist the lien applies to liability recovery only.
“43A” and “43B” are not separate statutes; they are shorthand for Subsections A and B of the single Section 43.
Combined UM/UIM protection: 36 O.S. Section 3636 separately blocks insurer subrogation on UM/UIM proceeds. Together, Kratz and Section 3636 insulate a client’s UM recovery from both hospital liens and carrier subrogation.
Check 4: Is Your Attorney’s Lien Asserted?
Rule: Both sections state that a medical lien is inferior to any lien of an attorney representing the client. Under 5 O.S. Section 6, your attorney lien is statutorily superior to all medical liens.
Practical use: This is leverage, not elimination. The attorney’s fee comes off first, so a provider facing heavy fees and costs may net far less than claimed. Under Dallas v. GEICO Insurance Company, 2019 OK CIV APP 41, a “lien claimed” endorsement on an interpleader check did not give the settling attorney lien priority over a Section 46(B) physician lien; assert your lien properly under Section 6 before settlement to avoid that result.
Caution: A provider who sues and prevails may recover attorney fees. Do not bluff the enforcement argument unless you are prepared to defend it.
Part 2: Physician and Professional Liens Under 42 O.S. Section 46
Section 46 governs liens filed by a treating physician (sometimes called a “doctor’s lien”) or another licensed Title 59 professional. Unlike Section 43, Section 46 has specific perfection requirements in Subsection C, and failure to meet any one of them leaves the lien defective. The strict construction rule from Bohmar Minerals applies fully: if the lien does not comply with each requirement, it is not entitled to enforcement.
Check 5: Filed in the Correct County?
Rule: Under Section 46(C), the lien must be filed in the county clerk’s office of the county where the physician or professional’s principal office is located, not the county of injury, residence, or treatment (unless that facility is also the principal office).
Result: Lien fails if filed in the wrong county. Check the professional’s principal office address against the county of filing.
How to search: Lien filings sit on the mechanic’s and materialman’s lien docket in the county clerk’s office; Oklahoma County records are searchable online, other counties by direct request.
Check 6: Filed on the Correct Docket?
Rule: Section 46(C) requires filing on the mechanic’s and materialman’s lien docket in the county clerk’s office. A lien filed in district court pleadings, as a financing statement, or on any other docket is not a properly perfected Section 46 lien.
Result: Lien fails if filed in the wrong location or docket. Verify against the M&M docket directly.
Check 7: Does the Filed Lien Contain All Required Content?
Rule: Section 46(C) requires the filed notice to contain each of:
- The amount claimed
- Identification of the insurance policy or policies against which the lien is asserted
- The name and address of the physician or professional person
- The name and address of the injured person
- The name and address of the person or firm against whom the claim is made
Business name attack: Section 46 requires “the name of the physician or professional person.” A lien filed solely under a corporate or trade name, without the individual licensed professional, is arguably defective under Bohmar Minerals’ strict construction principle, though the argument’s strength is uncertain.
Insurance policy identification attack: A lien merely asserting a claim “against any available insurance,” without identifying the specific policy, may not satisfy the statute.
Result: Lien fails if any required element is missing or materially defective.
Check 8: Was Notice Sent by Registered or Certified Mail?
Rule: Section 46(C) requires the provider to send a copy of the filed notice by registered or certified mail to the tortfeasor, your client, and you as counsel, if your name and address were known.
Result: Lien fails if notice went by regular mail, fax, or email, or skipped known counsel. Request the certified mail receipts; if the provider cannot produce them, press the notice defect.
Check 9: Was the Lien Filed Before Payment to Your Client?
Rule: Section 46(C) requires that the lien be filed and notice given before payment of any monies to the injured person.
Result: Lien fails as to any payment issued before the lien and notice were completed.
Check 10: Has the One-Year Enforcement Deadline Expired?
Rule: Under Section 46(D), any civil action to enforce a Section 46 lien must be brought within one year after the physician or professional becomes aware of the final judgment, settlement, or compromise.
Result: The lien is unenforceable once that window passes, even if it still appears of record. Watch for providers who filed early, went dormant during litigation, and reasserted the lien years later at settlement.
Section 3009.1 Intersection: The Filed Lien as a Trial Damages Tool
A filed lien is not only a collection instrument for the provider; it is also a damages tool for your client at trial.
Under 12 O.S. Section 3009.1, only the amount actually paid for medical services is admissible, not the amount billed. The lien exception changes that: bills in excess of the paid amount, up to the amount of a filed lien, are also admissible.
Before attacking a Section 46 lien on technical grounds, weigh what your client gains from eliminating it against what your client loses in admissible damages.
| Scenario | Admissible at Trial |
|---|---|
| Bills: $150,000. Paid: $60,000. No lien filed. | $60,000 only. |
| Bills: $150,000. Paid: $60,000. Provider filed a valid lien for $90,000. | $60,000 (paid) + $90,000 (lien exception) = $150,000. |
| Bills: $150,000. Paid: $60,000. Valid lien for $90,000; you successfully challenge and eliminate the lien. | $60,000 only. You eliminated the lien and the damages with it. |
Strategy: Often the right move is negotiating a reduced amount, not eliminating the lien, preserving enough of it to maximize admissible damages. See our practitioner framework for sorting paid-versus-incurred medical bills at trial.
Lien Reduction Strategy
Most liens get negotiated, not eliminated. Standard framework: request a 50% reduction as a baseline, committing to a proportional cut in the attorney fee. “We will, of course, reduce our fees accordingly” is standard language for every reduction request.
Escalate to 70% or higher when:
- Liability is disputed
- Causation is disputed (for example, the defense argues the injury predated the accident)
- Total medical bills exceed the settlement amount
Explain the specific dispute in the reduction request. A provider facing a realistic chance of recovering nothing is more willing to take 30 cents on the dollar than one who assumes full recovery.
OHCA Medicaid liens are separate from Section 43 and 46 liens: authorized by 63 O.S. Section 5051.1, reduced under 12 O.S. Section 994.2(A)(1) for procurement costs when disputed. Medicare conditional-payment liens follow a separate federal process; see CMS’s attorney services portal. Full process in our companion piece on resolving Medicare and Medicaid liens in Oklahoma.
Interpleader Defense
Defendants occasionally move to interplead a judgment or policy-limits payment when multiple provider liens exist, arguing the court should apportion the funds. Challenge these motions: the existence of hospital or physician liens does not, without more, entitle the defendant to interplead the judgment. The judgment belongs to your client, and your attorney lien is superior to all medical liens; the defendant should pay your client directly and let lien holders pursue their remedies separately. Work through how competing Oklahoma liens rank against each other before you concede an interpleader motion.
When a carrier attempts to interplead policy limits before trial, weigh whether accepting that jurisdiction compromises your client’s ability to pursue a full judgment, and review the policy terms before agreeing.
Workers’ Compensation Interaction
Both Section 43 and Section 46 exclude WC claims. Medical liens attach only to the third-party tort recovery, not to the WC award.
Timing warning: Resolving the third-party PI case before the WC joint petition can let the WC carrier take a credit against your client’s entire net tort recovery. Resolve WC subrogation before or with the third-party settlement, and confirm any waiver expressly covers both subrogation rights and third-party reimbursement. Our framework for sequencing workers’ compensation subrogation before settlement covers the waiver language required by Frank’s Tong Service v. Lara, 2013 OK CIV APP 22.
This checklist reflects the lien-negotiation approach Hasbrook & Hasbrook uses across Oklahoma personal injury cases: verify perfection first, then negotiate the balance against what you would gain and lose at trial.
