Denied Sinus Surgery Appeals: Reviewer Outcomes

Endoscopic surgery of the paranasal sinuses, including balloon procedures, billed with sinus-specific and side-specific codes.

What the independent reviewers decided

72%

overturned by the independent reviewer

of 127 decisions in the corpus

Source

California DMHC independent medical review determinations, 2017-2026. Public record.

Read this as a base rate, not as your odds

These are decisions about other patients, in one state, that had already been through the plan's own internal appeal and were then sent to an outside reviewer. That population is self-selected toward disputes worth pursuing, so the rate says what happened to cases like this at that stage — not what will happen to a specific claim. It is not medical or legal advice.

Why plans deny sinus surgery

The policy requires a stated period of maximal medical therapy and the record does not evidence the full course.
CT findings the policy requires are absent, or the report does not describe them in the policy's terms.
The procedure is characterised as investigational for the anatomy or technique requested.
Balloon dilation is denied where the policy covers only conventional endoscopic surgery for the indication.

What actually carried the cases that won

Chronicity carried nine in ten of the overturned decisions — the clearest single signal in this corpus. That means the appeal's centre of gravity is the timeline: when symptoms began, what medical therapy was given and for how long, and what the CT showed after it. Records that documented the course as a dated sequence fared far better than those that asserted maximal medical therapy had been completed. Peer-reviewed literature and specialty-society criteria were the authorities.

What the record showed	Share of overturned decisions
The condition was documented as chronic or long-standing	90%
Conservative treatment was documented as failed	66%
The diagnosis was confirmed	50%
A published guideline supported the request	50%
The functional impact on the patient was documented	43%
Objective findings were documented	40%
Prior treatment was documented	22%
The severity or urgency was documented	9%

Shares are of the overturned decisions and do not sum to 100% — a single decision often rested on more than one, and some rested on none of these.

What the reviewers cited

Peer-reviewed literature — in 43% of the overturned decisions
Specialty-society criteria — in 21% of the overturned decisions
Clinical guidelines — in 15% of the overturned decisions
FDA labeling — in 1% of the overturned decisions

sinus surgery denials — frequently asked

Is denied sinus surgery worth appealing?

72% of 127 California independent medical reviews were overturned — among the strongest rates for a surgical procedure in this corpus.

What is 'maximal medical therapy' in practice?

Whatever the plan's policy defines it as, in its own duration and agents — typically a stated period of intranasal corticosteroids with or without antibiotics. The overturned records showed the agents and the dates; the affirmed ones tended to state the conclusion.

Does the CT report matter?

Considerably. Many policies require specific findings, and a report that describes the sinuses without addressing those findings gives the reviewer nothing to match. Where the findings exist, quoting the report is stronger than summarising it.

Source

California Department of Managed Health Care — independent medical review determinations

Denial reasons and criteria are described in plain language for reference and vary by plan and policy. This page reports what independent reviewers decided in a public California dataset; it is general information, not medical, legal, or coverage advice.

When the appeal has to be written, and cited

Upload the denied EOB and Merits returns a complete, citation-verified appeal letter — the clinical argument, the payer's own coverage criteria, and your federal appeal rights — in about a minute.

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