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Straightening a Stiff Knee Under Anesthesia

Colorado rates for HCPCS 27570

With the patient asleep and the muscles fully relaxed, the surgeon bends and straightens the knee firmly to break down scar tissue that has locked up its movement. No incision is made. It is used when a knee has stiffened after injury, surgery or a joint replacement and stretching alone has not restored the range.

Rates data updated October 2026.

How much does Straightening a Stiff Knee Under Anesthesia cost?

$4,579

Typical total for the visit. In Colorado, October 2026.

Insurers have agreed to pay about $4,579 for this procedure. That total is two separate charges: $214 to the doctor who performs it, and $4,365 to the hospital or surgery center where it takes place. Done somewhere without a facility charge, you pay only the first.

These are rates insurers have negotiated with providers, not the amount a patient is billed. What you owe depends on your plan's deductible and coinsurance. Based on rates published by 7 insurance carriers under federal price transparency rules.

What's inside this number

Part of the billTypicalRange
Physician feeThe doctor who performs it$214$174 to $275
Facility feeThe hospital or surgery center$4,365$1,413 to $5,754

How much rates vary

Facilitymedian $4,365 · 10th to 90th $692 to $8,318Professionalmedian $214 · 10th to 90th $158 to $347
$200$500$1K$2K$5K$10Kfacility $4,365professional $214

Distribution of negotiated rates across all payers (price axis is log-scale). Need provider-level prices or 24+ months of history? Contact us.

Rates by insurance carrier

Insurance Carrier
Aetna
Setting
Facility
Modifier
None
Typical Low
$204.17
Median
$3,235.94
Typical High
$7,762.47
Aetna
Setting
Professional
Modifier
None
Typical Low
$154.88
Median
$158.49
Typical High
$275.42
Anthem BCBS
Setting
Facility
Modifier
None
Typical Low
$3,715.35
Median
$5,248.07
Typical High
$9,332.54
Anthem BCBS
Setting
Professional
Modifier
None
Typical Low
$177.83
Median
$257.04
Typical High
$380.19
Cigna
Setting
Facility
Modifier
None
Typical Low
$436.52
Median
$1,230.27
Typical High
$1,659.59
Cigna
Setting
Professional
Modifier
None
Typical Low
$154.88
Median
$190.55
Typical High
$281.84
Denver HMP
Setting
Facility
Modifier
None
Typical Low
$158.49
Median
$199.53
Typical High
$346.74
Kaiser Permanente
Setting
Professional
Modifier
None
Typical Low
$162.18
Median
$204.17
Typical High
$316.23
Select Health
Setting
Facility
Modifier
None
Typical Low
$151.36
Median
$309.03
Typical High
$1,445.44
Select Health
Setting
Professional
Modifier
None
Typical Low
$151.36
Median
$165.96
Typical High
$229.09
United
Setting
Facility
Modifier
None
Typical Low
$676.08
Median
$1,412.54
Typical High
$5,011.87
United
Setting
Professional
Modifier
None
Typical Low
$147.91
Median
$194.98
Typical High
$316.23
6 more rates with less common billing modifiers

A modifier changes what was billed, for example a reduced or repeated service. Each of these modifiers carries under 10% of the published rates for this code. Modifier combinations, and modifiers with fewer than 30 rates for a carrier, are not listed.

Insurance Carrier
Aetna
Setting
Professional
Modifier
52 · Reduced service
Typical Low
$79.43
Median
$79.43
Typical High
$79.43
Aetna
Setting
Professional
Modifier
53 · Discontinued
Typical Low
$31.62
Median
$31.62
Typical High
$31.62
Aetna
Setting
Professional
Modifier
54 · Surgery only
Typical Low
$117.49
Median
$120.23
Typical High
$120.23
Aetna
Setting
Professional
Modifier
55 · Aftercare only
Typical Low
$23.44
Median
$23.99
Typical High
$23.99
Aetna
Setting
Professional
Modifier
56 · Pre-op care only
Typical Low
$15.85
Median
$15.85
Typical High
$15.85
Aetna
Setting
Professional
Modifier
78 · Unplanned return to OR
Typical Low
$109.65
Median
$112.20
Typical High
$112.20

Where Colorado sits

The same service costs 9.1 times more in Colorado than in Montana. Every bar is a state, most expensive first. Touch or drag across it to read any state, then open that state for its carriers and full range.

Physician feeFacility fee

Colorado· 1st of 51

$4,579

$214 physician + $4,365 facility

CO $4,579MT $503

Median negotiated rate in each state, from every insurer that publishes one. States where no insurer publishes a rate for this service are not shown.