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CASE-1003

Meridian Commercial PPO · MRI lumbar spine without contrast (CPT 72148)

expedited · 72h Auto-approved high confidence

Engine recommendation

high confidence

Red flag — expedited approval

A clinical red flag was found; it fast-tracks the case and waives step-therapy criteria.

✓ 2 met ✕ 0 not met ? 1 unclear ⊘ 3 waived 📎 4/5 grounded

Why (full reasoning)

This is an urgent request supported by a clear red-flag presentation: the chart documents saddle anesthesia, bilateral lower extremity weakness, diminished reflexes, and new urinary retention with elevated post-void residual, with explicit clinical concern for cauda equina syndrome [C5]. Under policy, this red flag independently justifies imaging and waives the conservative-therapy and symptom-duration requirements [C1, C4], consistent with the acute 2-day symptom course documented. A focused neurological exam (motor, sensory, reflexes) is documented and supports a neurological/radicular process [C3], and neurosurgery has been consulted with the MRI intended to evaluate for compression, indicating the result will directly inform surgical management [C6]. Given the red-flag status, this case should be expedited per the policy's urgent (72-hour) turnaround and should not be delayed for standard prior authorization.

Criteria checklist

Each medical-policy requirement, the engine's call, and the exact chart text it relied on.

? waived Conservative therapy trial

Cited evidence None (acute presentation).

Red-flag criterion C5 (suspected cauda equina syndrome) is met, which waives the conservative-therapy requirement.

? waived Persistent/progressive symptoms despite conservative trial

This criterion is contingent on the conservative trial in C1, which is waived due to the red-flag presentation; no conservative trial occurred to assess persistence against.

✓ met Focused neurological exam documented 📎 grounded

Cited evidence Motor: bilateral lower extremity weakness 4/5. Sensory: decreased sensation in the saddle distribution (perineum, inner thighs). Reflexes: diminished Achilles bilaterally.

A focused neurological exam covering motor, sensory, and reflex findings is documented and supports a neurological/radicular process.

? waived Symptom duration ≥ 6 weeks

Cited evidence 2 days of severe low back pain

Symptom duration is only 2 days, far short of 6 weeks, but the duration requirement is waived because a C5 red flag is present.

? unclear Red flag present

Cited evidence now with numbness in the inner thighs and perineal ("saddle") region, plus new difficulty urinating since this morning... Bladder: reports urinary retention; post-void residual elevated... Concern for cauda equina syndrome.

Documentation of saddle anesthesia and new urinary retention with bladder dysfunction, plus explicit clinical concern for cauda equina syndrome, satisfies the red-flag criterion. [citation not found in chart — downgraded by grounding check]

✓ met Imaging expected to change management 📎 grounded

Cited evidence Urgent MRI requested to evaluate for compression. Neurosurgery consulted.

The MRI is being obtained urgently to evaluate for cord/cauda equina compression with neurosurgery already involved, indicating the result will directly guide surgical decision-making.

Source chart the full submitted documentation — click to collapse

📄 PDF document

# Patient Chart — SYNTHETIC (fictional)
Patient: M. Lee (fictional) · Age 63 · MRN SYN-0003
Requested service: MRI lumbar spine without contrast (CPT 72148) — URGENT

## History of Present Illness
63-year-old with 2 days of severe low back pain, now with numbness in the inner thighs and
perineal ("saddle") region, plus new difficulty urinating since this morning.

## Conservative treatment to date
- None (acute presentation).

## Neurological exam
- Motor: bilateral lower extremity weakness 4/5.
- Sensory: decreased sensation in the saddle distribution (perineum, inner thighs).
- Reflexes: diminished Achilles bilaterally.
- Bladder: reports urinary retention; post-void residual elevated.

## Assessment / Plan
Concern for cauda equina syndrome. Urgent MRI requested to evaluate for compression. Neurosurgery
consulted.

⚠ Missing documentation

Formal quantification of post-void residual volume (numeric value) to further substantiate bladder dysfunction, if available.
Confirmation of exact onset time of urinary retention relative to other symptoms for full red-flag characterization (currently only qualitatively described).

These are what a provider could send to close the gap (a "Request Info" case, not a denial).

Audit trail

engine expedited red flag This is an urgent request supported by a clear red-flag presentation: the chart documents saddle anesthesia, bilateral lower extremity weakness, diminished reflexes, and new urinary retention with elevated post-void residual, with explicit clinical concern for cauda equina syndrome [C5]. Under policy, this red flag independently justifies imaging and waives the conservative-therapy and symptom-dur 2026-07-16 09:08

SLA remaining

…

due 2026-07-19 09:08 UTC

Case facts

Member: M. Lee (SYNTHETIC)
DOB: 1970-01-01
CPT: 72148
Diagnosis: Suspected cauda equina
ICD-10: G83.4
Received: 2026-07-16 09:08

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