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Procedure price report · Other OR therapeutic procedures on bone

Structural donor bone block added during spine surgery

CPT 20931the billing code this page is about

Add-on charge for placing a solid, shaped piece of donor bone during a spine operation; billed in addition to the main spinal procedure.

Hospitals typically charge $471 cash for this outpatient procedure — the median across 464 hospitals that filed a usable cash price; the average of the middle 60% is $1,361. Most fall between $213 and $6,839 (20th–80th percentile).

Hospitals
464
States
48
Filings dated
Jun 2024 – 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 464 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
$153$237$471$4,629$31,382

The most expensive tenth of hospitals charges at least 205× what the cheapest tenth charges ($153 vs $31,382).

How the prices are spread

$106 – $192: 53 hospitals$106$192 – $349: 128 hospitals$349 – $636: 69 hospitals$349$636 – $1,157: 21 hospitals$1,157 – $2,105: 21 hospitals$1,157$2,105 – $3,831: 11 hospitals$3,831 – $6,970: 48 hospitals$3,831$6,970 – $12,682: 13 hospitals$12,682 – $23,076: 20 hospitals$12,682$23,076 – $41,987: 36 hospitals$23,076median $471price bands are equal on a log scale
Hospitals per price band (420 of 464 — the bands cover the 5th to 95th percentile)
FromToHospitals
$106$19253
$192$349128
$349$63669
$636$1,15721
$1,157$2,10521
$2,105$3,83111
$3,831$6,97048
$6,970$12,68213
$12,682$23,07620
$23,076$41,98736

By state

The median cash price in each state, against the national median of $471.

Alaska: 3 hospitals filed a usable price — fewer than 10, so no figureAKMaine: 1 hospital filed a usable price — fewer than 10, so no figureMEVermont: 5 hospitals filed a usable price — fewer than 10, so no figureVTNew Hampshire: 7 hospitals filed a usable price — fewer than 10, so no figureNHWashington: 6 hospitals filed a usable price — fewer than 10, so no figureWAIdaho: median $5,073 across 10 hospitalsID$5,073Montana: 6 hospitals filed a usable price — fewer than 10, so no figureMTNorth Dakota: 1 hospital filed a usable price — fewer than 10, so no figureNDMinnesota: median $629 across 21 hospitalsMN$629Illinois: median $266 across 19 hospitalsIL$266Wisconsin: median $547 across 30 hospitalsWI$547Michigan: median $361 across 19 hospitalsMI$361New York: median $308 across 22 hospitalsNY$308Massachusetts: 3 hospitals filed a usable price — fewer than 10, so no figureMAOregon: median $202 across 10 hospitalsOR$202Nevada: 2 hospitals filed a usable price — fewer than 10, so no figureNVWyoming: 4 hospitals filed a usable price — fewer than 10, so no figureWYSouth Dakota: 1 hospital filed a usable price — fewer than 10, so no figureSDIowa: median $266 across 22 hospitalsIA$266Indiana: median $18,078 across 14 hospitalsIN$18,078Ohio: median $702 across 24 hospitalsOH$702Pennsylvania: median $90 across 20 hospitalsPA$90New Jersey: median $5,855 across 22 hospitalsNJ$5,855Connecticut: 2 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 $277 across 30 hospitalsCA$277Utah: no hospital in the corpus filed a usable priceUTColorado: 5 hospitals filed a usable price — fewer than 10, so no figureCONebraska: 9 hospitals filed a usable price — fewer than 10, so no figureNEMissouri: median $211 across 11 hospitalsMO$211Kentucky: 4 hospitals filed a usable price — fewer than 10, so no figureKYWest Virginia: 9 hospitals filed a usable price — fewer than 10, so no figureWVVirginia: median $31,962 across 12 hospitalsVA$31,962Maryland: no hospital in the corpus filed a usable priceMDDelaware: 2 hospitals filed a usable price — fewer than 10, so no figureDEArizona: 5 hospitals filed a usable price — fewer than 10, so no figureAZNew Mexico: 1 hospital filed a usable price — fewer than 10, so no figureNMKansas: 6 hospitals filed a usable price — fewer than 10, so no figureKSArkansas: 7 hospitals filed a usable price — fewer than 10, so no figureARTennessee: 6 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 $181 across 11 hospitalsOK$181Louisiana: 3 hospitals filed a usable price — fewer than 10, so no figureLAMississippi: 5 hospitals filed a usable price — fewer than 10, so no figureMSAlabama: 8 hospitals filed a usable price — fewer than 10, so no figureALGeorgia: median $252 across 10 hospitalsGA$252Hawaii: 1 hospital filed a usable price — fewer than 10, so no figureHITexas: median $4,239 across 26 hospitalsTX$4,239Florida: median $18,215 across 11 hospitalsFL$18,215
Cash price by state, most expensive first. National median $471. A state needs at least 10 hospitals with a usable price to show a figure.
StateHospitalsMedianvs national20th–80th
Virginia VA12$31,962+6692%$72 – $50,743
Florida FL11$18,215+3770%$471 – $34,874
Indiana IN14$18,078+3741%$214 – $34,079
New Jersey NJ22$5,855+1144%$4,627 – $17,290
Idaho ID10$5,073+978%$1,236 – $5,073
Texas TX26$4,239+801%$1,933 – $4,517
Ohio OH24$702+49%$471 – $51,424
Minnesota MN21$629+34%$256 – $738
Wisconsin WI30$547+16%$512 – $1,479
Michigan MI19$361−23%$153 – $547
New York NY22$308−34%$185 – $2,930
California CA30$277−41%$277 – $301
Iowa IA22$266−43%$238 – $578
Illinois IL19$266−43%$214 – $607
Georgia GA10$252−46%$252 – $4,361
Missouri MO11$211−55%$182 – $5,175
Oregon OR10$202−57%$202 – $351
Oklahoma OK11$181−62%$181 – $181
Pennsylvania PA20$90−81%$68 – $464
Nebraska NE9not enough hospitals filed a usable price
West Virginia WV9not enough hospitals filed a usable price
Alabama AL8not enough hospitals filed a usable price
Arkansas AR7not enough hospitals filed a usable price
New Hampshire NH7not enough hospitals filed a usable price
Kansas KS6not enough hospitals filed a usable price
Montana MT6not enough hospitals filed a usable price
Tennessee TN6not enough hospitals filed a usable price
Washington WA6not enough hospitals filed a usable price
Arizona AZ5not enough hospitals filed a usable price
Colorado CO5not enough hospitals filed a usable price
Mississippi MS5not enough hospitals filed a usable price
Vermont VT5not enough hospitals filed a usable price
Kentucky KY4not enough hospitals filed a usable price
South Carolina SC4not enough hospitals filed a usable price
Wyoming WY4not enough hospitals filed a usable price
Alaska AK3not enough hospitals filed a usable price
Louisiana LA3not enough hospitals filed a usable price
Massachusetts MA3not enough hospitals filed a usable price
North Carolina NC3not enough hospitals filed a usable price
Connecticut CT2not enough hospitals filed a usable price
Delaware DE2not enough hospitals filed a usable price
Nevada NV2not enough hospitals filed a usable price
Hawaii HI1not enough hospitals filed a usable price
Maine ME1not enough hospitals filed a usable price
North Dakota ND1not enough hospitals filed a usable price
New Mexico NM1not enough hospitals filed a usable price
Rhode Island RI1not enough hospitals filed a usable price
South Dakota SD1not 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 $471.

Cash price by hospital segment. A segment needs at least 20 hospitals to show a figure.
SegmentHospitalsMedian20th–80th
Hospital type
Acute care374$478$211 – $15,546
Children’s11fewer than 20 hospitals
Critical access77$490$214 – $902
Ownership
For-profit54$4,108$388 – $28,062
Government56$301$206 – $5,204
Non-profit352$426$202 – $5,110
System affiliation
Part of a system367$512$214 – $7,918
Independent97$335$200 – $2,502

Cash price vs list price

Median list price (chargemaster)$610
Median cash price$471
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

239 hospitals filed a usable inpatient cash price for this code. The median is $277 and the average of the middle 60% is $311; most fall between $190 and $547.

Cash price percentiles, inpatient, across 239 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
$155$202$277$518$4,239

The most expensive tenth of hospitals charges at least 27× what the cheapest tenth charges ($155 vs $4,239).

Of the 273 hospitals that filed this code inpatient, 239 gave a usable cash price; 17 carried a plausibility flag, 0 filed a number their own filing marks as not a price, 0 gave an estimate, and 17 a list price only.

How complete is this

464 of the 3,956 hospitals with a price file in our corpus (12%) filed a usable outpatient cash price for this code, and those are the hospitals every figure on this page is computed from.

What the 540 hospitals that filed this code at all gave us
Usable cash price — counted464
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) — excluded2
An estimate rather than a filed cash price — excluded2
A list price only, no cash figure — excluded29
Hospitals that filed this code540

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 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 bone family.

Hospitals file this code under descriptions such as Allograft for Spine Surgery Only Structural.

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, “Structural donor bone block added during spine surgery (CPT 20931) — cash price report,” computed September 25, 2026. https://hospitalrates.com/procedures/cpt-20931-structural-donor-bone-block-added-during-spine-surgery