Chlamydia test cost in St. Louis, MO — inpatient
In St. Louis, MO-IL, 7 hospitals list a cash price for chlamydia test by nucleic acid amplification (NAAT, PCR-type) as an inpatient: from $120.31 to $533.18, with a median of $192.24. The lowest listed price is at Mercy Rehabilitation Hospital St. Louis — $71.93 less than the median here. Across Missouri, the median is $87.75 at 29 hospitals.
Cash prices at 7 facilities across 7 cities for code 87491, as an inpatient (admitted to hospital) . Collected Sep 23, 2026; the hospital files themselves were last updated between Mar 16, 2026 and Mar 16, 2026.
Where each hospital's price falls
Each dot is one hospital's cash price on a scale from the lowest to the highest in St. Louis, MO-IL.
Hospitals, cheapest first
| Hospital | Cash price | List price | Insurers pay | Off list | File date |
|---|---|---|---|---|---|
| Mercy Rehabilitation Hospital St. Louis lowest Chesterfield, MO CHLAMYDIA TRACHOMATIS(AMP) | $120.31 | $120.31 | $120.31 | — | Mar 16, 2026 source file |
| Mercy Rehabilitation Hospital South Louis, MO CHLAMYDIA TRACHOMATIS(AMP) | $121.59 | $121.59 | $121.59 | — | Mar 16, 2026 source file |
| St Josephs Hospital Hospital Sisters Third Order of St Francis Breese, IL · (618) 526-4511 CHLMYD TRACH DNA AMP PROBE | $153.36 | $213.00 | $30.13–$213.00 | 28% | — source file |
| St Elizabeths Hospital of the Hospital Sisters of the Third Order of St Francis O'Fallon, IL HC CHLAMYDIA TRACH AMP | $192.24 | $267.00 | $30.13–$267.00 | 28% | — source file |
| Hshs Holy Family Hospital Greenville, IL · (618) 664-1230 CHLMYD TRACH DNA AMP PROBE | $231.12 | $321.00 | $31.63–$321.00 | 28% | — source file |
| St Josephs Hospital of the Hospital Sisters of the Third Order of St Francis Highland, IL · (618) 651-2600 HC CHLAMYDIA TRACH AMP | $234.72 | $326.00 | $65.20–$326.00 | 28% | — source file |
| Gateway Regional Medical Center Granite City, IL · (618) 798-3000 L180021 CTRACH AMPPR | $533.18 | $888.63 | $888.63 | 40% | — source file |
| Gateway Regional Medical Center Granite City, IL · (618) 798-3000 Q70051 CHLMYD TRACH | $581.16 | $968.60 | $968.60 | 40% | — source file |
Inpatient: lowest $120.31, median $192.24, highest $533.18 — a 4.4× difference within the same market.
As an outpatient, the same code is billed by 11 facilities here, median $153.36 — that is the price to compare if you are not being admitted.
Cash or insurance?
At 5 of 7 hospitals that publish insurer rates for this code here, the cash price is below the highest rate a health plan has negotiated, and at 1 it is below every plan's rate. If you have insurance but have not met your deductible, you usually pay your plan's negotiated rate, which falls somewhere in the "Insurers pay" column. Paying cash can cost less, but a cash payment usually does not count toward your deductible. Ask the hospital for both numbers before you book.
What it is
This test looks for the genetic material of Chlamydia trachomatis using a nucleic acid amplification test (NAAT), the most accurate type of chlamydia test. It is run on a urine sample or a swab and is used for routine screening and when there are symptoms.
What the price covers
The price usually covers the chlamydia test only. The visit, the sample collection and a gonorrhea test on the same sample (87591) are usually billed separately.