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Procedure price report · Hemodialysis

Blood flow study of a dialysis access site

CPT 90940the billing code this page is about

A test using an indicator injected into the dialysis circuit to measure blood flow and recirculation in the patient's dialysis access.

Hospitals typically charge $302 cash for this outpatient procedure — the median across 110 hospitals that filed a usable cash price; the average of the middle 60% is $271. Most fall between $126 and $536 (20th–80th percentile).

Hospitals
110
States
22
Filings dated
Sep 2025 – Sep 2026
Computed
September 25, 2026
Prices checked
through September 23, 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 110 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
$38$126$302$367$758

The most expensive tenth of hospitals charges at least 20× what the cheapest tenth charges ($38 vs $758).

How the prices are spread

$31 – $43: 8 hospitals$31$43 – $61: 0 hospitals$61 – $85: 0 hospitals$61$85 – $119: 8 hospitals$119 – $166: 16 hospitals$119$166 – $233: 5 hospitals$233 – $326: 36 hospitals$233$326 – $457: 6 hospitals$457 – $639: 6 hospitals$457$639 – $895: 15 hospitals$639median $302price bands are equal on a log scale
Hospitals per price band (100 of 110 — the bands cover the 5th to 95th percentile)
FromToHospitals
$31$438
$43$610
$61$850
$85$1198
$119$16616
$166$2335
$233$32636
$326$4576
$457$6396
$639$89515

By state

The median cash price in each state, against the national median of $302.

Alaska: no hospital in the corpus filed a usable priceAKMaine: 1 hospital filed a usable price — fewer than 10, so no figureMEVermont: no hospital in the corpus filed a usable priceVTNew Hampshire: no hospital in the corpus filed a usable priceNHWashington: no hospital in the corpus filed a usable priceWAIdaho: 2 hospitals filed a usable price — fewer than 10, so no figureIDMontana: no hospital in the corpus filed a usable priceMTNorth Dakota: 1 hospital filed a usable price — fewer than 10, so no figureNDMinnesota: no hospital in the corpus filed a usable priceMNIllinois: 6 hospitals filed a usable price — fewer than 10, so no figureILWisconsin: no hospital in the corpus filed a usable priceWIMichigan: 8 hospitals filed a usable price — fewer than 10, so no figureMINew York: 5 hospitals filed a usable price — fewer than 10, so no figureNYMassachusetts: no hospital in the corpus filed a usable priceMAOregon: no hospital in the corpus filed a usable priceORNevada: no hospital in the corpus filed a usable priceNVWyoming: 1 hospital filed a usable price — fewer than 10, so no figureWYSouth Dakota: no hospital in the corpus filed a usable priceSDIowa: median $126 across 11 hospitalsIA$126Indiana: 1 hospital filed a usable price — fewer than 10, so no figureINOhio: 1 hospital filed a usable price — fewer than 10, so no figureOHPennsylvania: 2 hospitals filed a usable price — fewer than 10, so no figurePANew Jersey: no hospital in the corpus filed a usable priceNJConnecticut: no hospital in the corpus filed a usable priceCTRhode Island: no hospital in the corpus filed a usable priceRICalifornia: median $302 across 33 hospitalsCA$302Utah: no hospital in the corpus filed a usable priceUTColorado: no hospital in the corpus filed a usable priceCONebraska: no hospital in the corpus filed a usable priceNEMissouri: 1 hospital filed a usable price — fewer than 10, so no figureMOKentucky: 3 hospitals filed a usable price — fewer than 10, so no figureKYWest Virginia: no hospital in the corpus filed a usable priceWVVirginia: median $758 across 11 hospitalsVA$758Maryland: 3 hospitals filed a usable price — fewer than 10, so no figureMDDelaware: no hospital in the corpus filed a usable priceDEArizona: no hospital in the corpus filed a usable priceAZNew Mexico: no hospital in the corpus filed a usable priceNMKansas: no hospital in the corpus filed a usable priceKSArkansas: no hospital in the corpus filed a usable priceARTennessee: 9 hospitals filed a usable price — fewer than 10, so no figureTNNorth Carolina: no hospital in the corpus filed a usable priceNCSouth Carolina: no hospital in the corpus filed a usable priceSCOklahoma: no hospital in the corpus filed a usable priceOKLouisiana: 5 hospitals filed a usable price — fewer than 10, so no figureLAMississippi: 1 hospital filed a usable price — fewer than 10, so no figureMSAlabama: 1 hospital filed a usable price — fewer than 10, so no figureALGeorgia: 1 hospital filed a usable price — fewer than 10, so no figureGAHawaii: no hospital in the corpus filed a usable priceHITexas: 3 hospitals filed a usable price — fewer than 10, so no figureTXFlorida: no hospital in the corpus filed a usable priceFL
Cash price by state, most expensive first. National median $302. A state needs at least 10 hospitals with a usable price to show a figure.
StateHospitalsMedianvs national20th–80th
Virginia VA11$758+151%$659 – $758
California CA33$3020%$302 – $302
Iowa IA11$126−58%$126 – $126
Tennessee TN9not enough hospitals filed a usable price
Michigan MI8not enough hospitals filed a usable price
Illinois IL6not enough hospitals filed a usable price
Louisiana LA5not enough hospitals filed a usable price
New York NY5not enough hospitals filed a usable price
Kentucky KY3not enough hospitals filed a usable price
Maryland MD3not enough hospitals filed a usable price
Texas TX3not enough hospitals filed a usable price
Idaho ID2not enough hospitals filed a usable price
Pennsylvania PA2not enough hospitals filed a usable price
Alabama AL1not enough hospitals filed a usable price
Georgia GA1not enough hospitals filed a usable price
Indiana IN1not enough hospitals filed a usable price
Maine ME1not enough hospitals filed a usable price
Missouri MO1not enough hospitals filed a usable price
Mississippi MS1not enough hospitals filed a usable price
North Dakota ND1not enough hospitals filed a usable price
Ohio OH1not enough hospitals filed a usable price
Wyoming WY1not 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 $302.

Cash price by hospital segment. A segment needs at least 20 hospitals to show a figure.
SegmentHospitalsMedian20th–80th
Hospital type
Acute care101$302$126 – $367
Children’s2fewer than 20 hospitals
Critical access7fewer than 20 hospitals
Ownership
For-profit10fewer than 20 hospitals
Government5fewer than 20 hospitals
Non-profit95$302$126 – $533
System affiliation
Part of a system97$302$126 – $551
Independent13fewer than 20 hospitals

Cash price vs list price

Median list price (chargemaster)$540
Median cash price$302
Cash as a share of list, median hospital54%

At the typical hospital, asking for the cash price cuts the list price by about 46%. 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.

How complete is this

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

What the 125 hospitals that filed this code at all gave us
Usable cash price — counted110
Cash price carrying a plausibility flag — shown on the compare tool, excluded here2
A number the filing itself marks as not a price (a placeholder, a ratio) — excluded0
An estimate rather than a filed cash price — excluded0
A list price only, no cash figure — excluded13
Hospitals that filed this code125

Sections not shown for this setting

  • Against Medicare: Medicare has no separately payable national outpatient (OPPS) rate for this code, so there is nothing honest to compare against.
  • 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 5, 2026 and September 23, 2026; the figures were computed September 25, 2026 from filings loaded through September 23, 2026. The percentiles and averages use only the “counted” row.

Related procedures

Part of the Hemodialysis family.

Hospitals file this code under descriptions such as HEMODIALYSIS ACCESS STUDY.

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, “Blood flow study of a dialysis access site (CPT 90940) — cash price report,” computed September 25, 2026. https://hospitalrates.com/procedures/cpt-90940-blood-flow-study-of-a-dialysis-access-site