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Procedure price report · Other therapeutic procedures on muscles and tendons

Removal of fluid-filled cyst behind the knee

CPT 27345the billing code this page is about

Surgery to take out a fluid-filled sac in the hollow at the back of the knee, often called a Baker's cyst.

Hospitals typically charge $1,987 cash for this outpatient procedure — the median across 519 hospitals that filed a usable cash price; the average of the middle 60% is $2,350. Most fall between $799 and $4,628 (20th–80th percentile).

Hospitals
519
States
48
Filings dated
Mar 2023 – 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 519 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
$624$918$1,987$4,297$6,195

The most expensive tenth of hospitals charges at least 9.9× what the cheapest tenth charges ($624 vs $6,195).

How the prices are spread

$507 – $671: 42 hospitals$507$671 – $888: 54 hospitals$888 – $1,176: 56 hospitals$888$1,176 – $1,556: 47 hospitals$1,556 – $2,060: 53 hospitals$1,556$2,060 – $2,727: 29 hospitals$2,727 – $3,609: 33 hospitals$2,727$3,609 – $4,778: 88 hospitals$4,778 – $6,325: 42 hospitals$4,778$6,325 – $8,372: 27 hospitals$6,325median $1,987price bands are equal on a log scale
Hospitals per price band (471 of 519 — the bands cover the 5th to 95th percentile)
FromToHospitals
$507$67142
$671$88854
$888$1,17656
$1,176$1,55647
$1,556$2,06053
$2,060$2,72729
$2,727$3,60933
$3,609$4,77888
$4,778$6,32542
$6,325$8,37227

Against Medicare

Medicare pays (OPPS 2026, national rate)$3,343
Median cash price$1,987
Cash as a multiple of Medicare0.59×

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 $1,987.

Alaska: 1 hospital filed a usable price — fewer than 10, so no figureAKMaine: 5 hospitals filed a usable price — fewer than 10, so no figureMEVermont: 6 hospitals filed a usable price — fewer than 10, so no figureVTNew Hampshire: 6 hospitals filed a usable price — fewer than 10, so no figureNHWashington: median $4,504 across 11 hospitalsWA$4,504Idaho: median $3,966 across 12 hospitalsID$3,966Montana: 4 hospitals filed a usable price — fewer than 10, so no figureMTNorth Dakota: 3 hospitals filed a usable price — fewer than 10, so no figureNDMinnesota: median $2,495 across 26 hospitalsMN$2,495Illinois: median $926 across 18 hospitalsIL$926Wisconsin: median $2,016 across 22 hospitalsWI$2,016Michigan: median $1,000 across 29 hospitalsMI$1,000New York: median $3,343 across 35 hospitalsNY$3,343Massachusetts: 3 hospitals filed a usable price — fewer than 10, so no figureMAOregon: median $918 across 14 hospitalsOR$918Nevada: 5 hospitals filed a usable price — fewer than 10, so no figureNVWyoming: 5 hospitals filed a usable price — fewer than 10, so no figureWYSouth Dakota: 2 hospitals filed a usable price — fewer than 10, so no figureSDIowa: median $1,188 across 22 hospitalsIA$1,188Indiana: 7 hospitals filed a usable price — fewer than 10, so no figureINOhio: median $1,583 across 20 hospitalsOH$1,583Pennsylvania: median $2,382 across 20 hospitalsPA$2,382New Jersey: median $4,330 across 31 hospitalsNJ$4,330Connecticut: no hospital in the corpus filed a usable priceCTRhode Island: no hospital in the corpus filed a usable priceRICalifornia: median $4,628 across 43 hospitalsCA$4,628Utah: 1 hospital filed a usable price — fewer than 10, so no figureUTColorado: 6 hospitals filed a usable price — fewer than 10, so no figureCONebraska: 7 hospitals filed a usable price — fewer than 10, so no figureNEMissouri: 7 hospitals filed a usable price — fewer than 10, so no figureMOKentucky: 6 hospitals filed a usable price — fewer than 10, so no figureKYWest Virginia: median $1,213 across 20 hospitalsWV$1,213Virginia: 1 hospital filed a usable price — fewer than 10, so no figureVAMaryland: 1 hospital filed a usable price — fewer than 10, so no figureMDDelaware: 1 hospital filed a usable price — fewer than 10, so no figureDEArizona: 6 hospitals filed a usable price — fewer than 10, so no figureAZNew Mexico: 2 hospitals filed a usable price — fewer than 10, so no figureNMKansas: median $888 across 16 hospitalsKS$888Arkansas: 2 hospitals filed a usable price — fewer than 10, so no figureARTennessee: 7 hospitals filed a usable price — fewer than 10, so no figureTNNorth Carolina: 3 hospitals filed a usable price — fewer than 10, so no figureNCSouth Carolina: 4 hospitals filed a usable price — fewer than 10, so no figureSCOklahoma: median $661 across 14 hospitalsOK$661Louisiana: 6 hospitals filed a usable price — fewer than 10, so no figureLAMississippi: 3 hospitals filed a usable price — fewer than 10, so no figureMSAlabama: 7 hospitals filed a usable price — fewer than 10, so no figureALGeorgia: 9 hospitals filed a usable price — fewer than 10, so no figureGAHawaii: 4 hospitals filed a usable price — fewer than 10, so no figureHITexas: median $3,780 across 27 hospitalsTX$3,780Florida: 9 hospitals filed a usable price — fewer than 10, so no figureFL
Cash price by state, most expensive first. National median $1,987. A state needs at least 10 hospitals with a usable price to show a figure.
StateHospitalsMedianvs national20th–80th
California CA43$4,628+133%$3,084 – $4,995
Washington WA11$4,504+127%$1,488 – $7,298
New Jersey NJ31$4,330+118%$3,594 – $5,419
Idaho ID12$3,966+100%$1,446 – $8,372
Texas TX27$3,780+90%$1,608 – $3,780
New York NY35$3,343+68%$1,050 – $3,840
Minnesota MN26$2,495+26%$1,448 – $3,409
Pennsylvania PA20$2,382+20%$307 – $5,486
Wisconsin WI22$2,016+1%$2,016 – $2,431
Ohio OH20$1,583−20%$967 – $3,553
West Virginia WV20$1,213−39%$517 – $3,908
Iowa IA22$1,188−40%$961 – $1,545
Michigan MI29$1,000−50%$1,000 – $2,016
Illinois IL18$926−53%$689 – $2,024
Oregon OR14$918−54%$918 – $1,626
Kansas KS16$888−55%$697 – $3,420
Oklahoma OK14$661−67%$661 – $6,615
Florida FL9not enough hospitals filed a usable price
Georgia GA9not enough hospitals filed a usable price
Alabama AL7not enough hospitals filed a usable price
Indiana IN7not enough hospitals filed a usable price
Missouri MO7not enough hospitals filed a usable price
Nebraska NE7not enough hospitals filed a usable price
Tennessee TN7not enough hospitals filed a usable price
Arizona AZ6not enough hospitals filed a usable price
Colorado CO6not enough hospitals filed a usable price
Kentucky KY6not enough hospitals filed a usable price
Louisiana LA6not enough hospitals filed a usable price
New Hampshire NH6not enough hospitals filed a usable price
Vermont VT6not enough hospitals filed a usable price
Maine ME5not enough hospitals filed a usable price
Nevada NV5not enough hospitals filed a usable price
Wyoming WY5not enough hospitals filed a usable price
Hawaii HI4not enough hospitals filed a usable price
Montana MT4not enough hospitals filed a usable price
South Carolina SC4not enough hospitals filed a usable price
Massachusetts MA3not enough hospitals filed a usable price
Mississippi MS3not enough hospitals filed a usable price
North Carolina NC3not enough hospitals filed a usable price
North Dakota ND3not enough hospitals filed a usable price
Arkansas AR2not enough hospitals filed a usable price
New Mexico NM2not enough hospitals filed a usable price
South Dakota SD2not enough hospitals filed a usable price
Alaska AK1not enough hospitals filed a usable price
Delaware DE1not enough hospitals filed a usable price
Maryland MD1not enough hospitals filed a usable price
Utah UT1not enough hospitals filed a usable price
Virginia VA1not 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 $1,987.

Cash price by hospital segment. A segment needs at least 20 hospitals to show a figure.
SegmentHospitalsMedian20th–80th
Hospital type
Acute care366$2,566$888 – $4,995
Children’s11fewer than 20 hospitals
Critical access141$1,357$720 – $2,803
Ownership
For-profit51$3,780$1,029 – $8,241
Government96$1,434$831 – $3,908
Non-profit371$2,016$796 – $4,628
System affiliation
Part of a system396$2,016$799 – $4,628
Independent123$1,468$806 – $3,966

Cash price vs list price

Median list price (chargemaster)$1,999
Median cash price$1,987
Cash as a share of list, median hospital65%

At the typical hospital, asking for the cash price cuts the list price by about 35%. 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

264 hospitals filed a usable inpatient cash price for this code. The median is $1,636 and the average of the middle 60% is $2,363; most fall between $724 and $4,995.

Cash price percentiles, inpatient, across 264 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
$661$825$1,636$4,628$6,114

The most expensive tenth of hospitals charges at least 9.3× what the cheapest tenth charges ($661 vs $6,114).

Of the 292 hospitals that filed this code inpatient, 264 gave a usable cash price; 16 carried a plausibility flag, 0 filed a number their own filing marks as not a price, 0 gave an estimate, and 12 a list price only.

How complete is this

519 of the 3,956 hospitals with a price file in our corpus (13%) filed a usable outpatient cash price for this code, and those are the hospitals every figure on this page is computed from.

What the 577 hospitals that filed this code at all gave us
Usable cash price — counted519
Cash price carrying a plausibility flag — shown on the compare tool, excluded here43
A number the filing itself marks as not a price (a placeholder, a ratio) — excluded1
An estimate rather than a filed cash price — excluded0
A list price only, no cash figure — excluded14
Hospitals that filed this code577

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 therapeutic procedures on muscles and tendons family.

Hospitals file this code under descriptions such as Excision Synovial Cyst Popliteal Space.

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, “Removal of fluid-filled cyst behind the knee (CPT 27345) — cash price report,” computed September 25, 2026. https://hospitalrates.com/procedures/cpt-27345-removal-of-fluid-filled-cyst-behind-the-knee