How Long Does a Medical Provider Have to Bill You in AZ?

In Arizona, there is no single statute that says how many days a medical provider has to send you a bill, but the law does set firm deadlines once a bill reaches an insurer, and it sets outer limits on how long a provider can wait before losing the right to collect. For workers’ compensation care, a provider generally has 24 months from the date of service to bill the insurer and, if necessary, file a court action to collect. For health insurance claims, once a claim is paid or denied, neither side can reopen it more than one year later except in cases of fraud. In between, the insurer has 30 days to decide on a bill and another 30 days to pay it.

Which set of rules applies depends on the type of claim. Arizona treats workers’ compensation billing under A.R.S. § 23-1062.01 and health insurance billing under A.R.S. § 20-3102, and the timelines, protections, and enforcement mechanisms differ in ways that matter.

The Outer Limits: 24 Months and One Year

For a workers’ compensation bill, an insurer has no obligation to pay unless the insurer received the bill and the provider filed any court action within 24 months. The clock runs from the date the service was rendered, or from the date the provider knew or should have known the service was connected to a workers’ comp claim, whichever is later. Submitting a corrected or follow-up bill does not restart it.¹

A provider who sits on an unpaid workers’ comp bill for two years may have no legal remedy left, no matter how clearly the money is owed.

For health insurance claims, the outer limit is shorter and works differently. Except in cases of fraud, neither the insurer nor the provider may adjust or request adjustment of a paid or denied claim more than one year after the insurer paid or denied it.²

The 30-Day Rules for Workers’ Comp Billing

Once a workers’ compensation claim is accepted, the insurer, self-insured employer, or claims processor has 30 days from that acceptance to decide whether to pay or deny the bill, in whole or in part, and to state the specific dollar amount it will pay. If the provider submits the bill after the claim is already accepted, the 30-day window runs from the date the insurer receives the bill instead.¹

Any denial must be based on a reasonable justification. Vague or unsupported denials do not satisfy the statute. Once approval is issued, the insurer has another 30 days to send the payment. In a routine case, then, up to 60 days can pass between billing and payment: 30 to decide, 30 to pay.¹

The 30-Day Rules for Health Insurance Claims

Arizona’s health insurance prompt-pay statute covers claims submitted to health care insurers by both contracted and noncontracted providers. It turns on the “clean claim,” meaning a bill with all the information the insurer needs to process it without asking for anything more.

A health care insurer must adjudicate any clean claim within 30 days of receiving it, or within whatever timeframe the provider’s contract specifies. Once adjudicated and approved, the insurer must pay within another 30 days, again unless the contract sets a different schedule.²

When a claim is not clean, the insurer has 30 days from receiving it to send the provider a written request identifying every specific reason for the delay. Once the missing information arrives, the 30-day adjudication-and-payment cycle restarts from that date.²

Insurers cannot request information unrelated to the medical condition at issue when adjudicating a clean claim, and they cannot demand that a provider resubmit documentation the provider can prove was already sent unless the insurer gives a reasonable justification.²

What Has to Be on a Workers’ Comp Bill

Arizona spells out exactly what a workers’ compensation medical bill has to contain. Missing any of these items gives the insurer grounds to delay processing:

The correct patient information and the claim number, if the provider knows it.
The provider’s name, address, phone number, and federal taxpayer identification number.
Appropriate procedure and diagnosis codes with dollar amounts and units for each line item.
Clearly printed dates of service.
Legible treatment notes for each date of service, but only when the billing involves direct treatment of the injured worker.

For ancillary services like lab work or imaging ordered by the treating provider, the medical-report requirement does not apply.¹

If You Are the Patient Receiving the Bill

Injured Workers Owe Nothing on Accepted Claims

An injured worker is not responsible for paying any portion of a medical bill for services on an accepted workers’ compensation claim. If the provider and the insurer disagree about how much the insurer should pay, the worker cannot be pulled into the dispute or billed for the difference.¹

If you get a bill for treatment covered under an accepted claim, contact the insurer rather than paying it. A provider who bills you for a disputed amount is violating the statute.

Surprise Bills and Good Faith Estimates

Federal law adds protections that apply across Arizona. Under the No Surprises Act, if you receive emergency services from an out-of-network provider or facility, the most you can be billed is your plan’s in-network cost-sharing amount. The plan must calculate your share as if the services had been in-network, and those payments count toward your in-network deductible and out-of-pocket maximum.³

If you are uninsured or plan to pay out of pocket, providers generally must give you a good faith estimate of expected charges when you schedule a service or ask for one. When the final bill exceeds that estimate by $400 or more, you can dispute the charges through a federal process.⁴

Interest on Late Payments

Both statutes impose the same penalty for late payment: interest at Arizona’s legal rate, calculated from the date payment was due. Under Arizona’s general interest statute, that legal rate is 10% per year for non-medical-debt obligations.⁵

For workers’ compensation bills, interest starts on the day the 30-day post-approval payment window expired.¹ For health insurance claims, interest runs from the date payment was due under either the statute or the contract.²

When Contracts or ERISA Change the Timeline

Both statutes let providers and insurers set their own payment timelines by express written contract. When such a contract exists, its terms replace the statutory 30-day deadlines.² Under the workers’ compensation statute, if the contract does not specify a remedy for late payment, the statutory interest penalty still applies as a backstop.¹

Federal law creates another exception. Under ERISA, state insurance laws are preempted when they relate to employer-sponsored benefit plans, and self-funded employer plans that do not purchase insurance from a carrier fall outside state regulatory reach.⁶ Arizona’s 30-day prompt-pay rule and interest penalty under § 20-3102 may not reach a self-funded employer plan that administers its own claims. Federal claims procedures under ERISA govern instead, with their own timelines and appeal processes.

Disputing a Bill or a Delayed Payment

Every Arizona health care insurer must maintain an internal grievance system and keep records of every provider grievance, including who filed it, what type it was, when it was received, and when it was resolved. Insurers report summaries to the Arizona Department of Insurance director every six months.²

For workers’ compensation billing disputes, the Industrial Commission of Arizona offers an informal dispute resolution process through its Medical Resource Office, giving providers a route to resolve payment disagreements without going straight to court.⁷

When those channels do not work, court is the next step, but the 24-month workers’ comp cutoff and the one-year health-insurance adjustment window still apply. Track the dates from the moment a bill leaves your office or lands in your mailbox.

1
Arizona Legislature. Arizona Code 23-1062.01 – Timely Payment of Medical, Surgical and Hospital Benefit Billing
2
Arizona Legislature. Arizona Code 20-3102 – Timely Payment of Health Care Providers Claims; Grievances
3
Office of the Law Revision Counsel. 42 USC 300gg-111 – Preventing Surprise Medical Bills
4
CMS.gov. No Surprises: Whats a Good Faith Estimate
5
Arizona Legislature. Arizona Code 44-1201 – Rate of Interest for Loan or Indebtedness
6
Office of the Law Revision Counsel. 29 USC 1144 – Other Laws
7
Industrial Commission of Arizona. Informal Payment Dispute Form