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Auto insurance pays for medical treatment following motor vehicle accidents, through personal injury protection (PIP) in no-fault states, medical payments (MedPay) coverage elsewhere, or through a third-party liability settlement. It behaves nothing like health insurance, and the receivable behaves nothing like ordinary AR. Payer content ages fastest of anything on this site. Portals move, forms change, payer IDs get reassigned, and timely filing limits are contract-specific regardless of what any table says. Treat this page as orientation; the payer’s own current documentation and your executed contract are authoritative. Checked August 2026.

The coverage types

PIP states

A subset of states operate no-fault systems with mandatory or optional PIP. Rules — including coverage limits, fee schedules, authorization, and reporting — vary substantially. Confirm your state’s system; the difference between a PIP state and a tort state changes the whole workflow.

Why PI receivables are not ordinary AR

A personal injury receivable is a contingent claim on a future settlement, not an account receivable. Booking PI revenue at full billed charges materially overstates your financial position. Discount it based on your actual historical realization rate, and be prepared to show that rate in diligence. See How investors read MSO-PC financials.

Operational realities

Documentation must be litigation-grade. Causation matters in a way it does not for health insurance — the record needs to connect the treatment to the accident clearly, because it will be read by opposing counsel. Settlement checks are frequently joint-payee, made out to the practice and the patient or the attorney. Every payee must endorse before deposit. Build a tracking log for checks awaiting endorsement. See Handle paper checks. Coordination with health insurance is genuinely complex. Depending on the state and the coverage, PIP may be primary, health insurance may be primary, or there may be a subrogation claim. Get the order right before billing.

Attorney relationships — a compliance note

Referral relationships with personal injury attorneys carry real legal risk.Arrangements where an attorney refers patients and the practice reciprocates in some way can implicate state anti-kickback and fee-splitting statutes — many of which are all-payer and reach non-federal business — and some states have specific restrictions on medical-legal referral relationships.Federal AKS may not reach a pure PI practice with no federal program dollars, but that is not the end of the analysis. See Stark and anti-kickback.

Note on the case law

Auto insurers have been among the most active private enforcers of the corporate practice doctrine, precisely because they can sue to recover payments made to unlawfully structured practices. Allstate Insurance Co. v. Northfield Medical Center, P.C. and Isles Wellness v. Progressive Northern Insurance Co. both arose in this context. If your practice takes significant PI volume, your CPOM posture is more exposed than average. See CPOM case law.
🦴 PT and chiropractic practices carry the highest PI concentration of any vertical. See Physical therapy and chiropractic.