Grand Junction and Mesa County · Same-day surgery for 2027

Outpatient Surgery Cost on Medicare in Grand Junction, 2027

On a 2027 Advantage plan in Mesa County, the facility copay for same-day surgery runs $175 to $400 at a surgery center and up to $280 to $450 in a hospital's outpatient department. Where the procedure is booked can change your share by $35 to $105.

Medicare On Main Data Desk

Published November 7, 2026 · 6 min read · Reviewed by Brian Penner, 22+ years in Medicare

Two prices, depending on where the surgery is booked

Cataract removal, a knee scope, a hernia repair, a colonoscopy with a polyp taken out: most of these happen as same-day surgery. Medicare.gov points out that you may get a choice between an ambulatory surgical center (a freestanding surgery center) and a hospital outpatient department, and that what you pay may differ. Under Original Medicare, both cost 20% of the approved amount after the Part B deductible, per Medicare's surgery center and outpatient hospital pages. The approved amount itself is usually higher at a hospital.

Advantage plans swap the 20% for flat copays, and they price the two settings separately. I matched CMS's 2027 plan benefit file to the 13 general plans sold in Mesa County. Here's what each one files for the facility.

Mesa County's 13 plans, lowest surgery-center copay first

Sources: CMS 2027 benefit file, section 9a (outpatient hospital and observation) and 9b (ambulatory surgical center), in-network amounts; caps and premiums from the CMS CY2027 landscape. Premium is $0 unless shown. Listing a plan is reporting, not a recommendation, and we do not offer every plan available in your area.

Most plans file a range starting at $0 for both settings. The $0 end covers services such as a screening colonoscopy, which Medicare treats as preventive. For an actual procedure, plan on the top figure unless the plan's Summary of Benefits lists your procedure lower. The two Select Health plans also file 20% coinsurance on some hospital outpatient services, so ask them which applies to yours.

The surgery center usually wins, by $35 to $105

On 11 of the 13 plans, the surgery-center copay is lower than the hospital outpatient copay. The widest gap is on Select Health Medicare Essential ($175 against $280) and HumanaChoice H5216-223 ($225 against $325). The narrowest is HealthSpring Preferred ($390 against $425). Two plans charge the same at both: HealthSpring True Choice at $345 and Select Health Medicare Veterans at $400.

That gap is one surgery's worth. Someone who has cataracts done one eye at a time pays the copay twice, so the setting matters twice. Our cataract surgery post covers what Medicare pays for the lenses.

How to tell which one you're booked into

Same-day surgery inside a hospital is billed as hospital outpatient care. A freestanding surgery center bills as an ambulatory surgical center. Some surgery centers are owned by hospitals or physician groups, so the name on the door doesn't always settle it. When the surgeon's scheduler calls, ask three things:

1. "Is this billed as a hospital outpatient department or an ambulatory surgery center?" That decides which line of the table applies.
2. "Is the facility in my plan's 2027 network?" These are in-network amounts. On an HMO, a facility outside the network generally isn't covered for planned surgery. On a PPO it costs more. Our network-check post walks through it.
3. "Has the prior authorization been approved?" CMS's file marks authorization as required for both settings on all 13 plans.

The facility copay isn't the whole bill. The surgeon and the anesthesia provider bill separately, and plans usually apply a specialist or physician copay to that. Our imaging copay post covers the pre-op scan side.

Observation: the overnight stay that is still outpatient

If you stay in a hospital bed overnight after a procedure without a formal admission order, you're usually under observation. Medicare.gov lists observation with outpatient hospital services, even overnight. So the daily inpatient copays in our hospital copay post don't apply. The observation copay does.

Every general plan in Mesa County files observation as one charge per stay for 2027, from $280 (Select Health Medicare Essential) to $465 (Humana Essentials Plus Giveback). On two Humana plans, Value Choice and USAA Honor Giveback, the observation copay is lower than the plan's hospital outpatient copay. Eleven of the 13 plans also require authorization for observation; the two Select Health plans don't.

When Original Medicare plus a Medigap plan comes out ahead

Under Original Medicare alone, outpatient surgery has no flat price: 20% of the facility's approved amount plus 20% of each doctor's, and no yearly limit. Medicare.gov does cap the copay for any single hospital outpatient service at the inpatient deductible, $1,736 in 2026. That limit applies to each service, not to the whole visit.

A Medigap Plan G pays that 20% once you've met the Part B deductible, so after the deductible a planned surgery costs you nothing beyond the monthly premium. It also skips the prior authorization and network questions. If you expect several procedures in 2027, compare the copays above, times the number of procedures, against a year of Medigap premiums. Our Medigap-or-Advantage post walks through that trade. Every copay above also counts toward the plan's yearly cap, $4,900 to $9,850 for 2027.

The order I'd check things in

Start with whether your surgeon and their surgery center are in the plan's network. Then look at the surgery-center copay, then the cap. A $50 difference in facility copay matters less than a surgeon who isn't in network. Open Enrollment runs through December 7, and any plan change starts January 1.

How we know all this: the Medicare On Main Data Desk frames every article with public data. Here that means CMS's 2027 plan benefit and landscape files and Medicare.gov's surgery, surgery center and outpatient hospital pages, all read November 7, 2026. Benefits can differ in a plan's final documents, so confirm them in its Summary of Benefits and Evidence of Coverage. Carrier names are factual reporting, not endorsement. This is education, not advice. Compare plans with a licensed agent or Medicare.gov. We take no payment from any carrier to feature a plan.