61% overturnedAppeal outcomes · Injections

Denied nerve block: what independent reviewers actually decided

Nerve blocks are denied on sequence more than on substance — the plan's position is usually that something should have come first.

Diagnostic or therapeutic injection of an anaesthetic, with or without a steroid, at a named nerve or plexus, billed with the injection code and, where used, imaging guidance.

What the independent reviewers decided

61%

overturned by the independent reviewer

133

of 217 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 nerve block

  • The policy requires documented conservative management before an interventional procedure and the record does not evidence it.
  • A repeat block is denied because the response to the previous one is not documented in the terms the policy asks for.
  • The number of blocks in a period exceeds a policy limit.
  • The block is characterised as a treatment for a condition the policy considers unproven for this indication.

What actually carried the cases that won

Prior treatment led the overturned decisions, and the corpus is specific about what counts: therapy tried, medication tried, and — where a block had already been given — what the response actually was, in duration and degree. Records that reported a prior block's result numerically fared better than those describing it as helpful. Peer-reviewed literature and clinical guidelines were the reviewers' main authorities.

What the record showedShare of overturned decisions
Prior treatment was documented69%
The condition was documented as chronic or long-standing61%
Conservative treatment was documented as failed51%
A published guideline supported the request42%
The severity or urgency was documented37%
Objective findings were documented26%
The diagnosis was confirmed19%
The functional impact on the patient was documented15%

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 56% of the overturned decisions
  • Clinical guidelines — in 13% of the overturned decisions
  • Specialty-society criteria — in 5% of the overturned decisions
  • Standard of care — in 3% of the overturned decisions
  • FDA labeling — in 2% of the overturned decisions

nerve block denials — frequently asked

Is a denied nerve block worth appealing?
61% of 217 California independent medical reviews of nerve blocks were overturned — a clear majority, and consistent with the pattern that sequence-based denials are the ones neutral reviewers most often reverse.
How should a prior block be documented?
As a measurement, not an impression. Degree of relief and how long it lasted, against a baseline. Policies that limit repeat blocks generally do so by reference to a response threshold, and a record that does not state the response cannot meet a threshold.
Does imaging guidance change the analysis?
It is usually billed and reviewed separately, and a denial of the guidance code is a different dispute from a denial of the block. Check which code was actually denied before writing the appeal — they do not always travel together.

Related guides

CO-50 — not medically necessaryPain management denialsMedical necessity appeal letters

Source

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

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