Tonsil and adenoid removal, under age 12 at Mercy Hospital St. Louis
CPT 42820 · Saint Louis, MO
These are Mercy Hospital St. Louis's own posted figures from its standard-charges file dated June 4, 2026. They are not a quote. Source: the hospital's file · its price transparency page.
Across 3 Missouri hospitals we index that post a cash price for this service: lowest $4,030.17, median $5,813.33, highest $5,909.03. See every hospital.
Nearby hospitals, same service
| Hospital | Distance | Cash price | Gross charge | File date |
|---|---|---|---|---|
| Mercy Hospital South Saint Louis, MO | 12.1 mi | $4,030.17 | $6,200.26 | 2026-06-10 |
| Mercy Hospital Washington Washington, MO | 33.1 mi | $5,909.03 | $9,090.82 | 2026-06-10 |
| Northwestern Medicine Kishwaukee Hospital Dekalb, IL | 241.2 mi | $13,740.14 | $19,628.77 | 2026-04-01 |
| Northwestern Medicine Delnor Community Hospital Geneva, IL | 248.8 mi | $12,898.04 | $18,425.77 | 2026-04-01 |
| Franciscan Health Dyer Dyer, IN | 249.0 mi | $5,630.52 | $20,853.77 | 2026-01-01 |
| Palos Community Hospital Palos Heights, IL | 250.8 mi | $15,524.16 | $22,177.37 | 2026-04-01 |
| Franciscan Health Crown Point Crown Point, IN | 251.7 mi | $4,032.90 | $15,631.39 | 2026-01-01 |
| Northwestern Medicine Central Dupage Hospital Winfield, IL | 253.1 mi | $12,729.41 | $18,184.87 | 2026-04-01 |
Distances are straight-line from ZIP code centers. Each hospital's figures come from its own file; files are updated on different dates.
Every row for CPT 42820 in this hospital's file
| Row in the hospital's file | Setting | Cash | Gross | Insurer min – max |
|---|---|---|---|---|
| Tonsillectomy & Adenoidectomy <Age 12 line 4452518 | outpatient | $5,813.33 | $8,943.59 | $3,897.00 – $7,801.00 |
| Tonsillectomy & Adenoidectomy <Age 12 line 4511399 | outpatient | $5,813.33 | $8,943.59 | |
| Tonsillectomy & Adenoidectomy <Age 12 line 4545913 | outpatient | $5,813.33 | $8,943.59 | $5,816.73 – $13,341.12 |
| Tonsillectomy & Adenoidectomy <Age 12 line 4559444 | outpatient | $5,813.33 | $8,943.59 | $252.30 – $6,555.89 |
The first row is the one used above. A price for one code usually covers the hospital's facility charge only; the doctor, anesthesia, pathology and other services can be billed separately. Ask the hospital for a good faith estimate before a scheduled service: if you pay yourself and the bill comes in $400 or more above the estimate, you can dispute it under the No Surprises Act.
Check a bill from this hospital All Mercy Hospital St. Louis prices