Old Workers’ Comp Medication Bills: Which Records Explain the Dispute?

A pharmacy bill from an old workers’ compensation claim can be confusing when your award already provides for future medical care. Start by separating the questions the paperwork can answer: What treatment was requested, which review procedure applied at the time, and what medical evidence supported the medication? Those questions may require different documents. Treating them as one dispute can hide the reason payment is contested.

The January 27, 2026 decision in Wiltz v. City of Los Angeles illustrates the problem. It involved medication supplied from 2011 through early 2014, a later lien trial, and a judge’s reliance on a provision that took effect in 2017. The panel required a service-specific examination under the applicable rules.

Put the treatment request beside the service date

A bill states what was charged. The physician’s request shows what care the claims administrator was asked to authorize. Obtain both, together with the transmission or receipt evidence available for the request. A prescription, a treatment report and a request for authorization can serve different purposes; the label on one document may not answer whether a proper request was made.

For the historical period in Wiltz, the panel discussed changes in how physicians were required to request authorization, including the July 1, 2013 standardized form requirement. The record included both treatment reports and authorization forms; the City disputed whether valid requests supported particular services. The panel sent that question back to the judge rather than finding all requests deficient. When examining another file, identify the actual rule governing the request rather than assuming that a form used today was always required, or that an old narrative report was necessarily sufficient.

Identify the kind of review before calculating a deadline

The Wiltz opinion distinguished prospective review before delivery, concurrent review during an inpatient stay, and retrospective review after services that had not already been approved. The historical definitions and timing provisions mattered to the City’s arguments. The panel required the judge to determine the proper category and then assess the individual reviews.

A useful working record pairs each service with its request, receipt evidence, requests for additional information, review decision and communication date. Keep an unexplained date blank instead of substituting the billing-system entry date. If the file spans a rule change, identify which requests and services fall on each side of it. That is a way to frame the legal question for review, not a substitute for determining which law actually applies.

Check what was previously authorized

Continuing to receive a medication and having evidence of the administrator’s prior authorization are different things. Locate the actual approval, the treatment it described and any stated duration. If a party relies on an existing course of authorized care, those records help identify the premise for that argument.

In Wiltz, the panel found no competent evidence of ongoing authorization or a valid initial review approving the medication. That was why it rejected the judge’s reliance on the ongoing-care reasoning of Patterson v. The Oaks Farm. A future-medical award and a particular treatment approval should therefore be kept as separate records.

Ask the physician to address the actual medical concern

A timing dispute and the clinical justification for treatment require separate attention. When the WCAB could decide medical necessity in Wiltz, the party seeking payment still had to explain the treatment’s support under the MTUS guidelines or the applicable basis for departing from them.

Read the review decision with the relevant chart notes. Did the reviewer question an earlier treatment trial, the reason for this drug, or the reported improvement? Ask the treating physician to address that concern with the patient’s actual history and the applicable medical support. A patient or billing employee should not manufacture a medical explanation or decide from a drug’s name alone that it meets a guideline.

In Wiltz, the specific first-line-treatment and functional-improvement concerns came from the review of Lidoderm/lidocaine patches. The panel required further medical-support analysis of the requested treatment, which also included compounded medication. Its remand instructions in Wiltz tied that analysis to the applicable guidelines. The same distinction matters when reading another contested bill.

Bring a file that separates the questions

For example, suppose a provider’s file contains an older prescription, a later refill bill and a denial that questions benefit from the drug. Mark the gaps: The prescription may not establish when authorization was requested, the bill may not establish receipt, and neither may answer the reviewer’s clinical concern. The next useful step is to locate the missing request and response records and obtain the physician’s explanation, rather than assume one document resolves everything.

Bring the award, the relevant prescriptions and requests, available delivery records, approvals and denials, itemized bills and the chart notes addressing the disputed care. If a bill is addressed to you personally, bring that notice too so its separate significance can be assessed. Our case analysis of Wiltz explains the remand; our workers’ compensation team can discuss the issue your own documents present.