Ammonia blood test cost in San Antonio, TX

Prices at 5 hospitals in San Antonio, TX, from their machine-readable files. Here the median cash price is $158 — 76% above the US median ($90), roughly 10.8× the Medicare rate.

Lowest cash prices

HospitalLocationCashInsurerCMS ratingER waitReadmit
University Health System San Antonio, TX $33 $22 ★ 3/5 374 min 15.1%
South Texas Spine and Surgical Hospital San Antonio, TX $127 $15 132 min 14.4%
Foundation Surgical Hospital of San Antonio San Antonio, TX $158 $16 14.2%
Methodist Hospital San Antonio, TX $519 $15 ★ 4/5 134 min 15.8%
Methodist Hospital Stone Oak San Antonio, TX $519 $15 ★ 4/5 172 min 15.4%

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 June 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)
$263
Cash / self-pay
$158
Insurer-negotiated
$15
Medicare pays
$15
$71$519
Median cash $158  ·  Medicare $15  ·  bar = typical cash range (10th–90th percentile)
Is this a fair price?
1× Medicarefair ≈2×5×+

Typical cash price here is $158 — about 10.8× the Medicare rate ($15). High vs Medicare. A fair cash price is usually within ~2× Medicare ($29).

💡 Asking for the cash price instead of the $263 list price could save about $105 (40%).

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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.

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