Phosphorus blood test cost in Saint Louis, MO

Prices at 6 hospitals in Saint Louis, MO, from their machine-readable files. Here the median cash price is $28 — 32% below the US median ($41), roughly 5.9× the Medicare rate.

Lowest cash prices

HospitalLocationCashInsurerCMS ratingER waitReadmit
Mercy Hospital St Louis Saint Louis, MO $17 $6 ★ 4/5 217 min 15.1%
St Louis Childrens Hospital Saint Louis, MO $19 $22
Mercy Hospital South Saint Louis, MO $20 $6 ★ 2/5 246 min 15.8%
Missouri Baptist Medical Center Saint Louis, MO $35 $11 ★ 5/5 252 min 14.8%
Shriners Hospitals for Children Saint Louis, MO $49 $6
Christian Hospital Northeast Saint Louis, MO $59 $48 ★ 4/5 223 min 14.7%

CMS rating = overall hospital star rating (1–5); ER wait = median minutes in the emergency department; Readmit = 30-day readmission rate (lower is better) — all from Medicare’s Care Compare; “—” = not reported. Data last updated July 2026. Prices from hospitals’ machine-readable files (45 CFR §180); Medicare benchmark from CMS PFS/CLFS/IPPS. Prices below 15% of the median are excluded as likely partial or mis-coded charges. Estimates — confirm with the hospital. Report an incorrect price.

Price comparison (median)

Chargemaster (list price)
$41
Cash / self-pay
$28
Insurer-negotiated
$9
Medicare pays
$5
$18$54
Median cash $28  ·  Medicare $5  ·  bar = typical cash range (10th–90th percentile)
Is this a fair price?
1× Medicarefair ≈2×5×+

Typical cash price here is $28 — about 5.9× the Medicare rate ($5). High vs Medicare. A fair cash price is usually within ~2× Medicare ($9).

💡 Asking for the cash price instead of the $41 list price could save about $13 (32%).

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Rough estimate from this procedure’s median insurer-negotiated rate. Your actual cost depends on your plan — confirm with your insurer.

Doctors who perform this in Saint Louis

Clinicians who reported the most Medicare volume for this service locally. This reflects Original Medicare activity only and is a volume signal, not a quality ranking.

ClinicianSpecialtyLocationMedicare services
Brett Foersterling, MDFamily PracticeSaint Louis, MO33
Audrey Montooth, MDFamily PracticeSaint Louis, MO30
Elizabeth Tracy, M.D.Internal MedicineSaint Louis, MO22

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All Phosphorus blood test prices in Missouri → · All Phosphorus blood test prices (national) · All hospitals in Saint Louis