Answers to the most common questions patients ask about SNM candidacy, screening, and pre-operative preparation.
Who is a good candidate for SNM therapy?
SNM therapy is designed for adults with overactive bladder (OAB), urge incontinence, non-obstructive urinary retention, or fecal incontinence who have not had adequate relief from conservative treatments. Ideal candidates have tried and failed at least one first-line treatment and are medically stable for an outpatient procedure.
Are there conditions that would disqualify me from SNM?
Conditions that may affect eligibility include existing pacemakers, pregnancy, certain sacral spinal abnormalities, active infection near the implant site, and inability to operate the patient controller. BladderCenter evaluates every patient individually.
How many medications do I need to try before qualifying for SNM?
Most insurance plans require that at least one OAB medication has failed — due to insufficient relief or intolerable side effects. Common qualifying medications include anticholinergics and beta-3 agonists. BladderCenter helps document your history for pre-authorization.
What happens at a SNM candidacy screening appointment?
Your visit includes a comprehensive history review, focused physical exam, symptom discussion, and review of prior treatments. A voiding diary may be requested beforehand. The goal is to determine if the SNM trial is the right next step.
Do I need a referral to be seen at BladderCenter?
No referral is required. Patients can book directly. Some insurance plans may require a referral for coverage — our staff can help navigate those requirements.
How long does SNM insurance pre-authorization take?
Typically 3–10 business days after documentation is submitted. BladderCenter handles the process on your behalf. Medicare and most major insurers cover SNM when medical necessity criteria are met.
How do I prepare for my pre-op SNM appointment?
Pre-op preparation includes completing lab work, disclosing all medications (especially blood thinners), arranging a driver for the procedure day, and fasting after midnight. BladderCenter provides a personalized pre-op checklist for each patient.
Is the SNM trial done under general anesthesia?
No — the trial is done under local anesthesia with IV sedation. It is an outpatient procedure lasting 30–60 minutes with a 1–2 hour recovery before going home.
Can I get SNM if I have had prior back surgery?
Prior back surgery does not automatically disqualify you, but requires individual evaluation. Dr. McJunkin reviews surgical history and imaging to assess sacral anatomy before proceeding.
What is a voiding diary and why is it needed?
A voiding diary is a 3–5 day log of urination frequency, leakage episodes, fluid intake, and urgency levels. It documents your symptom baseline and creates a benchmark to measure SNM trial success. A 50%+ improvement during the trial qualifies patients for the permanent implant.