Orthopedic & musculoskeletal denials at external review

• the question matters

  The outcome turns on which question was put to the reviewer: 60.1% on medical necessity (n=1,585) against 36.0% on experimental/investigational (n=394) — a gap of 24 points inside the same condition.

• rising

  It has risen over the published record: 24.0% in 2002 against 59.5% in 2025. What drove that is not in this data — the file holds outcomes, not who chose to appeal or how plans changed their own review.

• most-cited standard

  Reviewers named FDA more than any other standard here — 112 decisions, which came out at 30.4%, 25 points below the class as a whole. Citing a standard and the outcome share a cause; this is not the effect of naming it.

• concentrated

  41% of these disputes involved pain management alone (n=823, 80.4% overturned), so the headline figure for orthopedic & musculoskeletal is largely that pairing.

California requires each published decision to carry “a detailed case summary that includes the specific standards, criteria, and medical and scientific evidence, if any, that led to the case decision” (Health & Safety Code § 1374.33(h)(1)(K)). These are the elements our extraction found in this class, split by how the decision came out.

Read as description, not instruction. These are patterns in what reviewers wrote, not steps to follow, and no combination of them predicts an outcome. Only codes that cleared the validation gate appear — thirteen did not.

• FDA30.4%112
• American College of Rheumatology55.0%109
• American Academy of Orthopaedic Surgeons—6
• American Society of Plastic Surgeons—6
• MCG / Milliman—6
• Cochrane—4
• American Academy of Neurology—2
• American College of Physicians—2

A rate here is the outcome of decisions that named the authority, not the effect of naming it. Reviewers cite the standard they applied; the citation and the outcome share a cause.

• Pain Management80.4%823
• Orthopedic procedures27.6%352
• Diagnostic imaging & screening52.2%209
• Pharmacy47.4%175
• Durable medical equipment25.9%116
• Electro, thermal & radiofrequency46.3%95
• Outpatient rehabilitation19.6%46
• Skilled nursing & inpatient rehab—29

Browse all treatment classes · Pick your own pair

• Viscosupp Injection97.9%520
• Other32.8%338
• MRI52.0%171
• Pain Medication36.6%82
• Nerve Block61.8%76
• Radiofreq Ablat51.4%70
• Fusion34.9%63
• Artificial Disc Repl21.6%51

• Medical Necessity60.1%1,585
• Experimental/Investigational36.0%394
• Urgent Care—8

Medical-necessity review asks whether the care is needed. Experimental/investigational review asks whether it is likely to be more beneficial than standard therapy — a harder statutory test, and the rates show it.