Who’s Really Practicing Medicine: The Physician or the Payer?

By Kim Conner, BSN, CCDS, CCDS-O and Sarah Laird, RHIA, CCS

One of the most concerning trends in denial management is not simply the increasing number of diagnoses being challenged, but the growing effort by payers to redefine what qualifies as a clinically valid diagnosis.

Somewhere between the bedside and the back office, a quiet transfer of authority is taking place. Clinical judgment is increasingly being measured against retrospective payer interpretations rather than the assessment of the physicians who evaluated and treated the patient.

The question healthcare leaders must now tackle is whether payer review is still assessing clinical validity or increasingly replacing the physician’s clinical judgment.

KEY QUESTION Is payer review still assessing clinical validity — or increasingly replacing the physician’s clinical judgment?

Hospitals are not asking payers to accept unsupported diagnoses. Clinical validation plays an important role in reimbursement integrity. Diagnoses should be supported by the medical record, consistent with the patient’s clinical presentation, and relevant to the care delivered.

Few would argue that.

But there is a meaningful difference between validating a diagnosis and replacing physician judgment with payer-defined checklists, proprietary thresholds, or retrospective interpretations that were never part of the treating team’s real-time clinical decision-making.

That is where the concern begins.

Clinical validation was designed to verify diagnoses, not rewrite them. The process is intended to function as a fair system of checks and balances. When a payer moves beyond evaluating whether a diagnosis is clinically supported and begins deciding what the diagnosis should have been, the process crosses an important line. It is no longer reviewing medicine; it is reconstructing it.

When Clinical Validation Becomes Clinical Reconstruction

Increasingly, in clinical validation determinations, the central question is no longer, “Does the medical record reasonably support the diagnosis documented by the treating physician?” Instead, the review shifts to whether the patient satisfies the payer’s preferred definition, scoring system, treatment threshold, or retrospective interpretation of the case.

That is a fundamentally different exercise. Medicine simply does not work that way.

When payer-specific standards begin to override the documented clinical picture and the physician’s reasoned judgment, clinical validation is no longer an objective review process.

The consequences of that shift become clear when you look at how these reviews play out in practice. The examples below reflect a broader pattern in which retrospective payer interpretations outweigh the physician’s clinical judgment and the patient’s overall clinical picture.

CLINICAL EXAMPLE: SEPTIC SHOCK Consider a patient admitted with sepsis who remains hypotensive and tachycardic after receiving 3 liters of IV fluids. Because of the ongoing hemodynamic instability and concern that vasopressors may be needed, the patient is transferred to the ICU. After another 3 liters of fluid, the blood pressure improves enough to avoid vasopressor support, but the patient still requires ICU care for 48 hours. The payer later removes the diagnosis of septic shock solely because vasopressors were never administered. Did the patient never have shock, or did timely treatment prevent it from getting worse?

CLINICAL EXAMPLE: ACUTE KIDNEY INJURY Take the example of a patient whose renal function worsens after aggressive diuresis. Medications are held, nephrotoxins are avoided, doses are adjusted for impaired kidney function, and nephrology is consulted. The treating physician documents acute kidney injury and manages the patient accordingly. The payer later removes the diagnosis because the patient did not receive an IV fluid bolus. But in a patient with heart failure or recent volume overload, aggressively administering fluids may be neither appropriate nor safe. The absence of a fluid bolus does not mean the kidney injury did not exist; it may simply reflect sound clinical judgment.

These examples will sound familiar to anyone who works in the denial appeals space, but they point to a much larger concern. Too often, payer reviews, specifically those driven by AI-based review tools, treat diagnoses as mathematical outputs rather than clinical conclusions reached through examination, judgment, and response to treatment.

A diagnosis cannot be reduced to a score, a threshold, or a single data point. Medicine is too complex, and clinical judgment too nuanced, to be restricted to an algorithm.

When Algorithms Become Clinical Authority

Physicians do not diagnose patients by checking a single box. They rely on clinical judgment, pattern recognition, objective findings, risk assessment, response to treatment, and the full context of the patient’s presentation.

Not every patient follows a textbook course.

The growing use of AI-assisted review by payers makes this even more concerning.

AI can rapidly identify patterns, compare data points, and flag records for review. It cannot examine the patient, weigh competing clinical factors, or fully understand why a physician made a particular decision at the bedside.

AI also cannot understand the clinical significance of timing, the sequence of events, treatment response, or context. What occurred before treatment, what changed afterward, how long ago a finding or condition occurred, and whether it is relevant to the care being provided now all require clinical judgment.

More and more, payer reviews are treating the algorithm as the final authority and the physician at the bedside as the variable to be corrected. That is a dangerous reversal.

Clinical tools were designed to support medical judgment, not overrule the people trained to apply it. Healthcare leaders should be paying close attention to what happens when that line is crossed.

CALLOUT Clinical tools were designed to support medical judgment, not overrule the people trained to apply it.

This Is Not Always a Documentation Problem

Documentation matters. It always will. Clear, specific documentation helps support accurate coding, stronger communication, and more effective appeals.

However, more documentation alone will not fix a review process that overlooks the physician’s judgment, narrows the clinical picture, applies payer-created expectations, or allows AI-generated conclusions to outweigh the assessment of the treating physician.

Sometimes the record is already clear. The physician documented the diagnosis, treated the condition, monitored the patient, and used that diagnosis to guide medical decision-making. Yet the denial still comes.

Why?

The disagreement was never about documentation. It was about how the payer interpreted the clinical evidence.

Healthcare organizations should be careful not to assume that every challenged diagnosis represents a documentation failure. The answer cannot always be another query, another template, or another physician education initiative when the larger issue remains unaddressed.

The question is no longer simply whether the physician-documented diagnosis is clinically supported. Increasingly, it is whether the payer is willing to accept the physician’s interpretation of the clinical evidence.

That should concern everyone.

CALLOUT The disagreement was never about documentation. It was about how the payer interpreted the clinical evidence.

The Bigger Risk

Most organizations categorize denials as a “financial problem.”

It may be time to start viewing them as a “clinical governance problem.”

When payer interpretations quietly become the standard for what constitutes a clinically valid diagnosis, the stakes move well beyond reimbursement. The question is no longer simply who gets paid. It becomes who gets to define disease.

If sepsis is repeatedly redefined by payer criteria, physicians start documenting defensively. If respiratory failure is judged against arbitrary thresholds, clinical reasoning starts bending toward reimbursement. If acute kidney injury is considered “real” only when it behaves the way a payer’s model predicts, the medical record gradually shifts away from clinical reality and toward audit avoidance.

Every healthcare leader, whether clinical or financial, should find that alarming.

The medical record is supposed to reflect what physicians observed, diagnosed, and treated, not what a reviewer, months removed from the patient’s care, would have preferred to see. Once the record starts answering the payer instead of the patient, we have a problem no appeal can fix.

GOVERNANCE LENS This is no longer just a reimbursement issue. It is a clinical governance issue.

The Path Forward

Denial management is no longer just about writing appeals. It is about protecting clinical integrity.

Appeal work today requires more than a persuasive letter. It requires identifying payer patterns, educating providers, strengthening documentation, and challenging reimbursement determinations that misrepresent the care delivered.

The issue is not whether payers have a legitimate role in reviewing claims. They do. The real question is whether we are allowing payer interpretations to become the final authority on medicine. From where many of us sit in the denial appeals space, that line is becoming increasingly difficult to ignore.

Appeals matter, but appeals alone are not enough. Healthcare organizations must recognize recurring patterns, challenge unsupported review practices, and bring clear, objective evidence to payer discussions.

This is where Coding, CDI, Physician Advisors, Denials, and Contract Management can no longer operate in isolation. They must function as a coordinated team.

Coding ensures the claim accurately reflects the provider’s documentation. CDI helps ensure the record clearly captures the patient’s condition, the physician’s reasoning, and the care provided. Physician Advisors bring clinical expertise and credibility when evaluating whether a payer’s determination aligns with accepted medical practice. Denials teams identify trends, build effective appeal strategies, and connect individual cases to broader payer behavior. Contract Management establishes the rules of engagement before disagreements arise, rather than trying to define them after payment has already been reduced.

Together, these teams can restore the balance clinical validation was meant to provide.

Not automatic acceptance of every documented diagnosis. Not automatic deference to every payer determination. A fair, evidence-based review that respects both clinical accountability and physician judgment.

PATH FORWARD Coding, CDI, Physician Advisors, Denials, and Contract Management can no longer operate in isolation. They must function as a coordinated team.

Balance

Payers have a valid role in evaluating claims, but that role does not extend to overriding physician judgment or becoming the ultimate authority on clinical medicine. This is no longer just a revenue cycle conversation. The question is about who ultimately gets to define medicine.

Healthcare leaders can no longer afford to ignore the answer.

FINAL TAKEAWAY Payers have a valid role in evaluating claims, but that role does not extend to overriding physician judgment or becoming the ultimate authority on clinical medicine.