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Service · Medical Necessity Letters

Medical-necessity letters backed by the chart, not your memory.

Stop writing them at 9pm.

Medical-necessity letters and denial appeals hinge on specific clinical support: conservative-care history, prior failed treatments, supporting diagnoses, and objective findings — assembled from scattered records under deadline. CaseOS pulls that foundation together and drafts a payer-ready letter, citation-backed to the source pages.

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Medical Necessity Letter — Draft
Re: Spinal Cord Stimulator Trial | Prior Authorization
Conservative Care History

Patient completed 16 weeks of PT, 3 epidural steroid injections, and a trial of three pharmacologic agents — all with inadequate relief. p.34–58

Objective Findings

MRI confirms L5-S1 herniation; EMG confirms radiculopathy. VAS scores documented before and after each prior intervention. p.47, p.61

Medical Necessity

Per payer policy, SCS trial is indicated following failure of conservative management — each criterion below is documented in the chart. p.34, p.61, p.72

The manual way

How necessity letters get written today

  1. The clinician re-reads the chart to reconstruct conservative-care history and prior failed therapies.
  2. Objective findings and supporting diagnoses are gathered from scattered records.
  3. The letter is drafted from memory, often after hours.
  4. When it's denied, the appeal packet starts the whole process over.
AMA 2025: physicians report 40 prior authorizations per week, 13 hours spent completing them, and 94% say PA increases burnout. Denials for ESIs, MBBs, and facet injections turn on exactly the support CaseOS assembles.
With CaseOS

What CaseOS produces

A payer-ready medical-necessity letter or appeal narrative — conservative-care timeline, prior failed therapies, objective findings, and supporting diagnoses — assembled from the chart and citation-backed, matched to your clinic's format.

  • Conservative-care history reconstructed from the chart
  • Prior failed therapies and objective findings assembled
  • Citation-backed to source pages for appeal defensibility
  • Matched to your clinic's letter format
  • Works for prior auth, peer-to-peer prep, and appeals
  • Not a billing engine — you keep the clinical argument

What CaseOS assembles from the chart

Works With Your Existing Stack

Medical Necessity Letters — your questions

Is this a billing engine?

No. CaseOS doesn't submit claims or chase payments. It assembles the cited clinical support behind your prior auth or appeal — you keep the argument.

Will my appeal hold up?

Each assertion is linked to the source page, so the appeal arrives with page-and-line proof already attached.

Do I have to change my charting or EMR?

No. CaseOS works downstream of the records your EMR already produces — your charting workflow stays exactly as it is.

See a Medical Necessity Letter on a record of yours.

One 15-minute demo with a real human. Bring a file you actually struggled with — we'll show you exactly what CaseOS would produce.

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