Retail Store Slip and Fall Case Study: Knee Injury, Surgery, and Pharmacy Lien

James Wong — Founder & Pharmacist, LienScripts | February 11, 2026 | 9 min read

A customer slips on an unmarked wet floor in a big-box retail store, tearing her medial meniscus and requiring arthroscopic surgery. Health insurance denied all injury-related medications. A pharmacy lien covered the full 11-month medication arc — pre-op, post-op, and physical therapy recovery — and the MERIT documented unbroken compliance through a premises liability settlement.

Case Background

Note: This is a fictionalized case study based on composite facts. Names and identifying details are not real. The clinical details represent typical medication patterns for this injury type.

The Client: Veronica H., 44, a part-time office administrator and mother of two from the Phoenix metro area.

The Incident: Veronica was shopping at a large big-box home improvement retailer on a Saturday afternoon. Near the garden supply section, an employee had recently mopped up a spill. No wet floor sign had been placed. Veronica stepped into the wet section and her right foot slipped forward, causing her to fall hard on her right knee against the tile floor.

Surveillance video captured by the store's own cameras — obtained in discovery — confirmed there was no warning cone or wet floor sign visible at the time of the fall.

The Legal Basis:

Veronica's personal injury attorney filed a premises liability claim against the retailer. The legal theory was straightforward: the store owed Veronica a duty of reasonable care as an invitee; it breached that duty by failing to mark or dry a wet floor in a high-traffic area; and that breach directly caused her knee injury.

Veronica had health insurance through her husband's employer-sponsored plan. However, the health insurance carrier — after initially processing one emergency department claim — issued a coordination-of-benefits inquiry and subsequently denied all injury-related medical and pharmacy claims, citing a "third-party liability" exclusion pending resolution of the legal claim. This is a common insurer tactic that leaves patients without coverage during treatment.

LienScripts was referred by Veronica's orthopedic surgeon's office, which had a working relationship with the pharmacy lien program. Her attorney confirmed the third-party liability exclusion and enrolled her immediately.

Injuries Sustained

Emergency evaluation at the urgent care and follow-up MRI confirmed:

• Medial meniscus tear — posterior horn, grade III signal, non-reducible
• Medial collateral ligament (MCL) sprain — grade II, partial thickness
• Lateral tibial plateau bone bruise — confirmed on MRI
• Pre-patellar bursitis — from direct impact on the tile surface

Veronica's orthopedic surgeon recommended arthroscopic surgery to address the meniscus tear. Given the MCL sprain, he scheduled a six-week conservative management period to allow the MCL to stabilize before proceeding with arthroscopy.

The bone bruise was managed non-operatively with activity restriction and anti-inflammatory therapy. The pre-patellar bursitis resolved within the first month with aspiration and corticosteroid injection at the surgeon's office.

Pre-Surgical Medication Phase (Months 1–6)

The six-week conservative MCL management phase and subsequent surgical scheduling stretched the pre-op period to approximately six months, during which Veronica was managing significant pain and functional limitation.

Medications enrolled in the pharmacy lien:

Her health insurance carrier denied all five of these medications under the third-party liability exclusion. All five were enrolled in LienScripts from month one.

[!KEY] The "third-party liability exclusion" is a provision in many group health insurance plans allowing the carrier to deny coverage for injuries caused by a third party's negligence — forcing the injured patient to use the tort system (a pharmacy lien) to fund treatment until the PI case resolves. Attorneys who understand this dynamic can get clients enrolled in a lien program before the insurer's denial letter even arrives.

Physical therapy began at week four, twice weekly, focusing on MCL rehabilitation and range-of-motion restoration. Veronica's compliance with PT was consistent throughout — a detail the MERIT would later document through its medication fill record showing continuous use during the PT period.

Surgery and Post-Operative Phase (Months 6–9)

Veronica's arthroscopic partial meniscectomy was performed at an outpatient surgery center at the end of month six. The procedure addressed the posterior horn tear and involved a chondroplasty of a small adjacent cartilage lesion identified during scope.

Post-operative medications enrolled in the pharmacy lien:

The opioid course was brief — three weeks, with clear tapering instructions — and Veronica completed the taper without complications. At week four post-operatively, her treating physician transitioned entirely to celecoxib and topical diclofenac, which proved adequate for her pain management needs.

Physical therapy resumed six weeks post-operatively with a focus on quadriceps strengthening, proprioception, and return to full weight-bearing activity.

[!KEY] Post-operative pharmaceutical management of arthroscopic knee surgery typically involves a short opioid taper, a COX-2 inhibitor or NSAID for inflammation, and often an antiemetic for post-anesthesia nausea. In a health-insurance-excluded case, every one of these medications falls on the pharmacy lien — and every fill is documented in the MERIT as a data point in the post-surgical recovery arc.

Recovery and Physical Therapy Phase (Months 9–11)

By month nine, Veronica had returned to light activity with continued physical therapy. Medications at this stage:

The gabapentin addition at month nine was notable: Veronica developed a persistent burning sensation at the arthroscopic portal sites, a recognized post-surgical complication involving minor nerve injury at the instrument entry points. Her surgeon attributed this to minor superficial nerve involvement during the procedure — a well-documented risk of arthroscopic knee surgery. Low-dose gabapentin at bedtime significantly improved her sleep quality and the burning sensation resolved by month eleven.

At month eleven, her treating physician issued a final functional assessment and cleared Veronica for full return to activity. The PI case was approaching settlement.

The MERIT and Its Role in the Settlement

LienScripts generated a Medication Evaluation & Rationale for Injury Treatment (MERIT) covering the full 11-month treatment arc. The document organized every prescription fill chronologically, with:

• Date of each fill
• Medication name, strength, and quantity
• Days supply dispensed
• Prescribing physician
• Phase of treatment (pre-op, post-op, PT/recovery)

How the MERIT supported the premises liability demand:

1. Continuity of treatment: An unbroken 11-month record with no significant gaps in prescription fills demonstrated that Veronica's injuries required sustained medical management — not the brief, self-limiting sprain the defense attempted to characterize.

2. Surgical causation: The MERIT showed the transition from conservative management medications to post-operative medications on the exact date of surgery, corroborating the operative report and confirming the pharmacy record matched the surgical timeline.

3. Complication documentation: The addition of gabapentin at month nine — with the prescribing notation referencing "post-arthroscopic portal nerve irritation" — provided a pharmacy record anchor for the post-surgical complication, supporting the argument for extended damages beyond the initial surgical recovery.

4. The pharmacy lien balance as economic damages: Because health insurance was excluded under the third-party liability clause, the pharmacy lien represented 100% of Veronica's prescription medication costs for 11 months. That balance was a component of special damages in the premises liability demand.

Settlement Outcome

The case settled with the retailer's general liability carrier at the end of month eleven. Settlement proceeds addressed:

• Medical expenses: orthopedic physician visits, the arthroscopic surgery, physical therapy, and the pharmacy lien balance
• Lost wages during the treatment period (Veronica missed approximately three months of part-time work)
• Non-economic damages: pain, reduced physical activity, impact on daily functioning with two children

The pharmacy lien with LienScripts was paid from settlement proceeds at closing. No amounts remained due from Veronica personally.

Her health insurance carrier's subrogation interest was limited — because the carrier had denied injury-related claims under the third-party liability exclusion, it had little paid-out exposure to assert as a subrogation claim against the proceeds. This is a meaningful difference from cases where health insurance pays and then seeks reimbursement.

Key Takeaways

1. Health insurance third-party liability exclusions are common — and they create a perfect pharmacy lien opportunity. When a carrier denies injury-related coverage pending resolution of a PI claim, a pharmacy lien is the direct bridge that keeps the patient in treatment without out-of-pocket cost.

2. Arthroscopic knee surgery generates a predictable, documentable medication arc. Pre-op anti-inflammatories, post-op opioid taper, COX-2 inhibitors, and PT-support topicals follow a well-established pattern. The pharmacy lien covers every phase.

3. Post-surgical complications extend the medication timeline — and the damages. The addition of gabapentin for post-arthroscopic nerve irritation at month nine is the kind of documented complication that increases damages beyond the baseline surgical recovery. The pharmacy record captured it precisely.

4. The MERIT is evidence, not just a billing document. Plaintiff attorneys should treat the MERIT as a clinical corroboration exhibit — it confirms surgical timelines, treatment phases, and complication events in a format that supports causation and damages arguments.

Related Resources

• Slip and Fall Injury Medications and Pharmacy Lien
• Slip and Fall Elderly Lien Care Team
• Health Insurance Subrogation vs. Pharmacy Lien
• Physical Therapy and Pharmacy Lien
• Pharmacy Lien Services — Phoenix