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Procedure price report · Other OR therapeutic procedures on joints

Open knee surgery to drain or remove a foreign object

CPT 27310the billing code this page is about

Opening the knee joint through an incision to look inside, drain infected or collected fluid, or take out a foreign object.

Hospitals typically charge $3,255 cash for this outpatient procedure — the median across 837 hospitals that filed a usable cash price; the average of the middle 60% is $3,259. Most fall between $1,307 and $6,401 (20th–80th percentile).

Hospitals
837
States
50
Filings dated
Aug 2022 – Sep 2026
Computed
September 25, 2026
Prices checked
through September 24, 2026

Median: half of hospitals filed less, half more — and it is a price some hospital actually filed. Average of the middle 60%: the mean of the prices between the 20th and 80th percentiles. We never publish the plain average, the lowest or the highest price: the extremes in hospital price files are chargemaster artefacts, not prices anyone pays.

What hospitals charge, from cheapest to most expensive

Cash price percentiles, outpatient, across 837 hospitals. Each figure is a price a hospital filed. 10th: one in ten hospitals charges less; 25th: a quarter charge less; Median: half charge less; 75th: three quarters charge less; 90th: nine in ten charge less.
10th25thMedian75th90th
$841$1,498$3,255$5,476$9,231

The most expensive tenth of hospitals charges at least 11× what the cheapest tenth charges ($841 vs $9,231).

How the prices are spread

$568 – $777: 23 hospitals$568$777 – $1,063: 57 hospitals$1,063 – $1,454: 78 hospitals$1,063$1,454 – $1,989: 96 hospitals$1,989 – $2,721: 84 hospitals$1,989$2,721 – $3,722: 87 hospitals$3,722 – $5,091: 142 hospitals$3,722$5,091 – $6,964: 83 hospitals$6,964 – $9,527: 66 hospitals$6,964$9,527 – $13,032: 39 hospitals$9,527median $3,255price bands are equal on a log scale
Hospitals per price band (755 of 837 — the bands cover the 5th to 95th percentile)
FromToHospitals
$568$77723
$777$1,06357
$1,063$1,45478
$1,454$1,98996
$1,989$2,72184
$2,721$3,72287
$3,722$5,091142
$5,091$6,96483
$6,964$9,52766
$9,527$13,03239

Against Medicare

Medicare pays (OPPS 2026, national rate)$3,343
Median cash price$3,255
Cash as a multiple of Medicare0.97×

The Medicare figure is the national unadjusted OPPS rate for this code — what Medicare itself pays a hospital before local wage adjustment. It is a benchmark, not a price anyone is charged.

By state

The median cash price in each state, against the national median of $3,255.

Alaska: 7 hospitals filed a usable price — fewer than 10, so no figureAKMaine: 7 hospitals filed a usable price — fewer than 10, so no figureMEVermont: median $1,017 across 10 hospitalsVT$1,017New Hampshire: 9 hospitals filed a usable price — fewer than 10, so no figureNHWashington: median $3,200 across 27 hospitalsWA$3,200Idaho: median $4,635 across 15 hospitalsID$4,635Montana: median $1,082 across 10 hospitalsMT$1,082North Dakota: 2 hospitals filed a usable price — fewer than 10, so no figureNDMinnesota: median $2,926 across 33 hospitalsMN$2,926Illinois: median $2,850 across 29 hospitalsIL$2,850Wisconsin: median $3,846 across 40 hospitalsWI$3,846Michigan: median $1,694 across 40 hospitalsMI$1,694New York: median $2,103 across 45 hospitalsNY$2,103Massachusetts: 5 hospitals filed a usable price — fewer than 10, so no figureMAOregon: median $2,216 across 36 hospitalsOR$2,216Nevada: 9 hospitals filed a usable price — fewer than 10, so no figureNVWyoming: 6 hospitals filed a usable price — fewer than 10, so no figureWYSouth Dakota: 8 hospitals filed a usable price — fewer than 10, so no figureSDIowa: median $1,798 across 31 hospitalsIA$1,798Indiana: median $1,018 across 16 hospitalsIN$1,018Ohio: median $2,600 across 20 hospitalsOH$2,600Pennsylvania: median $3,804 across 35 hospitalsPA$3,804New Jersey: median $4,330 across 31 hospitalsNJ$4,330Connecticut: 6 hospitals filed a usable price — fewer than 10, so no figureCTRhode Island: 1 hospital filed a usable price — fewer than 10, so no figureRICalifornia: median $5,476 across 74 hospitalsCA$5,476Utah: 2 hospitals filed a usable price — fewer than 10, so no figureUTColorado: median $1,686 across 11 hospitalsCO$1,686Nebraska: median $2,315 across 19 hospitalsNE$2,315Missouri: median $3,039 across 19 hospitalsMO$3,039Kentucky: median $2,370 across 17 hospitalsKY$2,370West Virginia: median $1,898 across 19 hospitalsWV$1,898Virginia: median $7,325 across 10 hospitalsVA$7,325Maryland: 2 hospitals filed a usable price — fewer than 10, so no figureMDDelaware: 1 hospital filed a usable price — fewer than 10, so no figureDEArizona: 9 hospitals filed a usable price — fewer than 10, so no figureAZNew Mexico: 4 hospitals filed a usable price — fewer than 10, so no figureNMKansas: median $1,810 across 19 hospitalsKS$1,810Arkansas: 7 hospitals filed a usable price — fewer than 10, so no figureARTennessee: 8 hospitals filed a usable price — fewer than 10, so no figureTNNorth Carolina: median $3,851 across 16 hospitalsNC$3,851South Carolina: 5 hospitals filed a usable price — fewer than 10, so no figureSCOklahoma: median $1,540 across 14 hospitalsOK$1,540Louisiana: median $5,035 across 10 hospitalsLA$5,035Mississippi: 3 hospitals filed a usable price — fewer than 10, so no figureMSAlabama: median $3,309 across 10 hospitalsAL$3,309Georgia: median $7,811 across 13 hospitalsGA$7,811Hawaii: 5 hospitals filed a usable price — fewer than 10, so no figureHITexas: median $4,796 across 50 hospitalsTX$4,796Florida: median $3,257 across 12 hospitalsFL$3,257
Cash price by state, most expensive first. National median $3,255. A state needs at least 10 hospitals with a usable price to show a figure.
StateHospitalsMedianvs national20th–80th
Georgia GA13$7,811+140%$3,821 – $9,000
Virginia VA10$7,325+125%$491 – $13,922
California CA74$5,476+68%$2,170 – $10,926
Louisiana LA10$5,035+55%$2,831 – $9,043
Texas TX50$4,796+47%$2,594 – $6,246
Idaho ID15$4,635+42%$1,341 – $8,372
New Jersey NJ31$4,330+33%$3,594 – $5,419
North Carolina NC16$3,851+18%$3,627 – $3,851
Wisconsin WI40$3,846+18%$2,585 – $4,558
Pennsylvania PA35$3,804+17%$499 – $5,891
Alabama AL10$3,309+2%$2,060 – $17,749
Florida FL12$3,2570%$2,600 – $9,638
Washington WA27$3,200−2%$1,348 – $6,876
Missouri MO19$3,039−7%$1,153 – $4,447
Minnesota MN33$2,926−10%$1,523 – $4,612
Illinois IL29$2,850−12%$1,018 – $4,871
Ohio OH20$2,600−20%$1,426 – $11,076
Kentucky KY17$2,370−27%$1,018 – $3,582
Nebraska NE19$2,315−29%$1,285 – $4,501
Oregon OR36$2,216−32%$1,280 – $8,870
New York NY45$2,103−35%$886 – $3,840
West Virginia WV19$1,898−42%$779 – $3,908
Kansas KS19$1,810−44%$809 – $3,181
Iowa IA31$1,798−45%$1,492 – $2,286
Michigan MI40$1,694−48%$1,132 – $2,218
Colorado CO11$1,686−48%$1,255 – $3,227
Oklahoma OK14$1,540−53%$1,540 – $6,615
Montana MT10$1,082−67%$443 – $2,250
Indiana IN16$1,018−69%$840 – $4,989
Vermont VT10$1,017−69%$375 – $1,499
Arizona AZ9not enough hospitals filed a usable price
New Hampshire NH9not enough hospitals filed a usable price
Nevada NV9not enough hospitals filed a usable price
South Dakota SD8not enough hospitals filed a usable price
Tennessee TN8not enough hospitals filed a usable price
Alaska AK7not enough hospitals filed a usable price
Arkansas AR7not enough hospitals filed a usable price
Maine ME7not enough hospitals filed a usable price
Connecticut CT6not enough hospitals filed a usable price
Wyoming WY6not enough hospitals filed a usable price
Hawaii HI5not enough hospitals filed a usable price
Massachusetts MA5not enough hospitals filed a usable price
South Carolina SC5not enough hospitals filed a usable price
New Mexico NM4not enough hospitals filed a usable price
Mississippi MS3not enough hospitals filed a usable price
Maryland MD2not enough hospitals filed a usable price
North Dakota ND2not enough hospitals filed a usable price
Utah UT2not enough hospitals filed a usable price
Delaware DE1not enough hospitals filed a usable price
Rhode Island RI1not enough hospitals filed a usable price

Hospitals like yours

The same distribution cut by the kind of hospital. Hospital type and ownership come from CMS; a hospital counts as part of a system when its price file is shared with at least one other hospital under the same brand. The national median is $3,255.

Cash price by hospital segment. A segment needs at least 20 hospitals to show a figure.
SegmentHospitalsMedian20th–80th
Hospital type
Acute care591$3,794$1,497 – $7,045
Children’s13fewer than 20 hospitals
Critical access232$2,103$1,049 – $4,558
Ownership
For-profit81$4,635$1,791 – $8,402
Government157$2,709$1,334 – $5,389
Non-profit598$3,181$1,285 – $6,246
System affiliation
Part of a system640$3,626$1,366 – $6,672
Independent197$2,313$1,184 – $4,989

Cash price vs list price

Median list price (chargemaster)$4,323
Median cash price$3,255
Cash as a share of list, median hospital60%

At the typical hospital, asking for the cash price cuts the list price by about 40%. The share is the median of each hospital’s own cash ÷ list ratio, over hospitals that filed both — not the ratio of the two medians above.

The same procedure, inpatient

490 hospitals filed a usable inpatient cash price for this code. The median is $3,039 and the average of the middle 60% is $3,190; most fall between $1,280 and $6,246.

Cash price percentiles, inpatient, across 490 hospitals. Each figure is a price a hospital filed. 10th: one in ten hospitals charges less; 25th: a quarter charge less; Median: half charge less; 75th: three quarters charge less; 90th: nine in ten charge less.
10th25thMedian75th90th
$879$1,396$3,039$5,476$8,372

The most expensive tenth of hospitals charges at least 9.5× what the cheapest tenth charges ($879 vs $8,372).

Of the 541 hospitals that filed this code inpatient, 490 gave a usable cash price; 24 carried a plausibility flag, 0 filed a number their own filing marks as not a price, 0 gave an estimate, and 27 a list price only.

How complete is this

837 of the 3,956 hospitals with a price file in our corpus (21%) filed a usable outpatient cash price for this code, and those are the hospitals every figure on this page is computed from.

What the 926 hospitals that filed this code at all gave us
Usable cash price — counted837
Cash price carrying a plausibility flag — shown on the compare tool, excluded here53
A number the filing itself marks as not a price (a placeholder, a ratio) — excluded0
An estimate rather than a filed cash price — excluded2
A list price only, no cash figure — excluded34
Hospitals that filed this code926

Sections not shown for this setting

  • Since our last snapshot: there is no earlier snapshot at least 90 days older than this one yet.

We last checked these hospitals’ price files for changes between September 4, 2026 and September 24, 2026; the figures were computed September 25, 2026 from filings loaded through September 24, 2026. The percentiles and averages use only the “counted” row.

Related procedures

Part of the Other OR therapeutic procedures on joints family.

Hospitals file this code under descriptions such as Arthrt Kne W/Expl Drg/Rmvl FB.

Method

Source
The machine-readable price files every U.S. hospital is required by CMS to publish, parsed per hospital. Nothing is surveyed, sampled or modelled.
What counts
One cash (self-pay) price per hospital for this code and setting. A hospital’s own filing can rule its number out — a placeholder, a “not applicable” note, a list price standing in for cash — and our plausibility checks can flag a price far below what every other hospital files. Both kinds are disclosed above and excluded from the statistics; on the compare tool a flagged price is still shown.
Statistics
Percentiles are discrete: each is a price some hospital filed. The average is the mean of the prices between the 20th and 80th percentiles. We never publish the plain mean, the minimum or the maximum. A state needs 10 hospitals and a segment 20 to show a figure; otherwise the row shows its count and no number. Medicare is the national unadjusted OPPS rate where one exists.
Names
Procedure names on these pages are our own plain-language titles, not the AMA’s copyrighted CPT descriptors. The code is the identity.

The full rules — sources, statistics, thresholds, limitations — are on the methodology page.

Download this page’s figures: JSON · CSV. Aggregates only — the per-hospital prices are on the compare tool.

Cite: HospitalRates.com, “Open knee surgery to drain or remove a foreign object (CPT 27310) — cash price report,” computed September 25, 2026. https://hospitalrates.com/procedures/cpt-27310-open-knee-surgery-to-drain-or-remove-a-foreign-object