American physicians spend roughly two hours on administrative tasks for every one hour of direct patient care. That ratio — documented across multiple studies and consistent across practice settings, specialties, and regions — is not a feature of medicine. It is a feature of the insurance system medicine operates inside. The prior authorization requests, the claims coding, the denial appeals, the credentialing paperwork, the billing reconciliation — none of it delivers care. All of it costs money, consumes physician time, and is generated by a multi-payer insurance structure that requires providers to interact with dozens of different insurers, each with its own coverage rules, authorization requirements, billing formats, and appeal procedures.
This article documents the administrative burden that the insurance industry’s operating model imposes on providers and the healthcare system — the hours, the staff, the infrastructure, and what it costs in total. The patient-side experience of prior authorization is documented in Prior Authorization: What Patients Experience. This article is about the systemic cost before it reaches the patient.
Where the Burden Comes From
Administrative burden in healthcare is not a single problem. It is a cluster of distinct tasks, each generated by the structure of multi-payer insurance, each consuming provider time and resources that would otherwise go to care.
Claims coding and submission requires translating clinical encounters into standardized billing codes — ICD-10 diagnosis codes, CPT procedure codes, modifier codes — that must be correct and complete for a claim to be paid. Each insurer has its own coverage policies, bundling rules, and coding preferences that may differ from the standard. Incorrect coding produces denials; denials require review, correction, and resubmission. The coding infrastructure required to navigate this system — billing staff, coding specialists, billing software, clearinghouse fees — is a significant fixed cost for every provider practice.
Prior authorization management requires identifying which services require authorization for which patients on which plans, submitting authorization requests, tracking responses, managing denials, initiating appeals, and maintaining documentation. As documented in Article 05, the average physician practice submits 43 prior authorization requests per physician per week. Each request requires staff time to prepare and submit; denials require additional time for appeals. The AMA’s 2022 prior authorization survey found that 35 percent of physicians employ staff dedicated exclusively to prior authorization management.
Denial management is the downstream consequence of the denial rates documented in Article 04. When a claim is denied, it enters a resolution process: review the denial reason, determine whether to appeal, prepare and submit the appeal, track the appeal, and if unsuccessful, write off the balance or pursue secondary billing. The administrative cost of managing a single denied claim — in staff time, postage, and system costs — frequently approaches or exceeds the value of the claim itself for lower-dollar services. Many providers write off small-dollar denied claims rather than appeal, which is a financial transfer from provider to insurer that is invisible in aggregate statistics but significant in aggregate dollars.
Credentialing requires providers to document their qualifications, licensure, malpractice history, and hospital privileges for each insurer network they participate in. Each insurer maintains its own credentialing process with its own documentation requirements and timelines. A physician joining a new practice or adding an insurer network may wait three to six months for credentialing to complete, during which they cannot bill that insurer for services rendered. The Council for Affordable Quality Healthcare operates a centralized credentialing data source that reduces but does not eliminate the redundancy; adoption across insurers is incomplete.
Network contracting requires providers to negotiate and maintain contracts with each insurer whose patients they see, covering fee schedules, coverage policies, dispute resolution processes, and a range of operational requirements. Large health systems have contracting departments to manage this function. Independent and small-group practices often lack the staff to manage it effectively, which is one factor driving physician employment by health systems and hospital acquisition of independent practices.
The Cost in Physician Time
The most consistent finding in the literature on healthcare administrative burden is the physician time cost — and its opportunity cost in patient care.
A 2019 study published in the Annals of Internal Medicine used time-motion observation and electronic health record data to document that primary care physicians spend 27 percent of their total work time on direct clinical face time with patients and 49 percent of their time on the EHR and desk work — including administrative tasks. During time in the examination room, physicians spent 37 percent of their time on the EHR and administrative tasks rather than interacting with the patient.
A 2022 study in Health Affairs found that physicians spent an average of 15.5 hours per week — nearly two full working days — on administrative tasks including prior authorization, billing, and insurer communications. For a forty-week work year, that represents approximately 620 hours per physician per year consumed by insurance-generated administrative work.
Translating physician time to cost is straightforward. The Medical Group Management Association’s 2023 physician compensation data shows median total compensation for primary care physicians of approximately $280,000 annually. At a standard 2,500 billable hours per year, that implies a physician cost of approximately $112 per hour. At 620 hours per year of administrative time, the administrative burden cost per primary care physician is approximately $69,000 per year — not counting the cost of non-physician staff time spent on the same tasks.
Applied across the approximately 500,000 primary care physicians in the United States, that figure alone implies an administrative burden cost exceeding $34 billion per year in physician time, excluding all other specialties, all non-physician clinical staff, and all non-physician administrative staff. The full system-level cost is substantially larger.
The Billing Infrastructure
Beyond physician time, the administrative burden requires a substantial non-physician workforce and technology infrastructure that exists specifically to manage insurer interactions.
A 2019 analysis by Himmelstein, Campbell, and Woolhandler published in Health Affairs estimated that in 2017, health insurers employed 154,000 people in billing and insurance-related functions, while physicians and their offices employed 285,000 people in billing and insurance-related functions, and hospitals employed an additional 230,000. The combined billing and insurance workforce across all healthcare settings was estimated at approximately 1.8 million full-time-equivalent positions — roughly one administrative worker for every clinical worker in the healthcare system.
The growth of this workforce tracks the growth of insurance complexity. A study by Himmelstein and Woolhandler comparing 1969 and 1999 data found that the number of healthcare administrators grew 2,500 percent over that thirty-year period while the number of physicians grew 162 percent. The growth was not driven by increased clinical complexity. It was driven by the administrative requirements of a multi-payer insurance system.
Hospital billing departments have grown commensurately. A 2021 analysis by the American Hospital Association found that the average hospital employs 1.3 billing and administrative staff for every clinical staff member. Major academic medical centers routinely operate billing departments with hundreds of employees managing claims submission, denial management, and payer contracting across dozens of insurance relationships.
System-Level Cost
The aggregate administrative cost of the American multi-payer insurance system is among the most robustly documented findings in health economics.
A 2019 study by Jiwani, Himmelstein, Woolhandler, and Kahn published in BMC Health Services Research estimated billing and insurance-related costs at $812 billion in 2012 dollars — approximately 34.2 percent of total U.S. healthcare expenditure. Updated to current expenditure levels, the estimate implies administrative costs in excess of $1 trillion annually.
A 2020 study by Himmelstein and Woolhandler in the American Journal of Public Health compared U.S. and Canadian administrative costs on a population-adjusted basis. The U.S. spent $812 per capita on healthcare administration in 2017; Canada, operating a single-payer system, spent $196 per capita. The gap — $616 per capita, applied to a U.S. population of approximately 330 million — implies administrative costs attributable to system complexity of approximately $200 billion per year above what a single-payer administrative structure would require.
These figures are not projections or model outputs. They are derived from actual expenditure data — what insurers, hospitals, physician practices, and other providers actually spent on administrative functions in the years studied. The administrative cost of American healthcare is a documented fact, not a theoretical construct.
What the Insurer’s MLR Calculation Obscures
The medical loss ratio framework, discussed in How Health Insurers Make Money, permits insurers to count certain administrative costs as allowable expenses within the required payout percentage. Prior authorization systems, utilization management operations, and claims processing infrastructure are legitimate business costs that factor into the insurer’s MLR calculation.
What the MLR calculation does not capture is the administrative cost the insurer’s operations impose on the rest of the healthcare system. When an insurer requires prior authorization for a procedure, the cost of managing that requirement falls on the physician practice, not the insurer. When an insurer denies a claim and the provider appeals, the cost of preparing and tracking the appeal falls on the provider, not the insurer. The insurer’s MLR reports a compliant ratio; the provider absorbs the cost of compliance.
This externalization is not incidental. It is structural. A multi-payer system in which each insurer sets its own coverage rules, authorization requirements, and billing formats necessarily imposes coordination costs on every provider who must interact with multiple payers. Those costs are not captured in the insurer’s financial reporting. They are distributed across the healthcare system and ultimately borne by patients in the form of higher provider costs, reduced access to independent practice, and physician time that cannot be spent on care.
Health Insurance Hub
00 — Hub: Health Insurance Industry
01 — How the Health Insurance Industry Works — and Who It Works For
02 — How Health Insurers Make Money
03 — Designed to Discourage: How Benefit Structures Reduce Claims
04 — The Denial System: How Insurers Decide What Not to Pay
05 — Prior Authorization: What Patients Experience
06 — The Administrative Burden and What It Costs
07 — Narrow Networks and What They Cost You
08 — The Employer-Sponsored Insurance Trap
09 — The Broker and Consultant Layer
10 — Billed for Diseases They Never Treated: How Medicare Advantage Fraud Works
11 — What Single-Payer Resolves: The Evidence From This Hub
12 — Health Care Forum: Join the conversation here
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