Colonoscopy Cost in Washington (2026): Average Prices & What You'll Pay

What does a colonoscopy cost in Washington?

For a commercially insured patient, a colonoscopy in Washington typically runs $857–$2,374 once facility and physician fees are combined. The median reported facility price across 64 hospitals is $772. The figures draw on CMS fee schedules and hospital price transparency data published under federal law.

Where colonoscopy costs vary in Washington

Pins show hospitals with price-transparency data (colored by vs. state average) and nearby ambulatory surgery centers, imaging centers, and other facilities (colored by type). Click any pin for facility name and estimated cost range.

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Providence Health, Swedish Health Services (a Providence affiliate), and UW Medicine compete in the Western Washington market. Kaiser Permanente Washington has substantial commercial market share in the Puget Sound area. Eastern Washington operates as a distinct, lower-cost market anchored by Providence and MultiCare. Washington state has active price transparency enforcement. Colonoscopy pricing is particularly sensitive to screening vs. diagnostic coding. A screening colonoscopy is typically covered at 100% under preventive care benefits, but if a polyp is removed or a finding is documented during the same visit, the claim is often re-coded as diagnostic - triggering your deductible and coinsurance. Ambulatory surgery centers perform over 70% of colonoscopies nationally and charge substantially less than hospital outpatient settings.

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Why prices vary - and what it means for your coverage

A small number of hospitals (4) report prices above $2,238, including Kindred Hospital Seattle - First Hill at $3,339, which drives most of the overall spread - excluding them, most facilities cluster in a much tighter band. Setting matters too: the median outpatient price is $682 versus $1,594 inpatient (about 2.3× more), so where a procedure happens often matters more than which hospital you pick. The biggest swing for this procedure is screening versus diagnostic coding - a polyp removed during a routine screening can recode the whole visit as diagnostic and trigger cost-sharing you weren't expecting.

On top of the facility price, your actual bill depends on your deductible, your out-of-pocket maximum, and whether every provider involved - not just the facility - is in-network.

Frequently asked questions: colonoscopy costs in Washington

How much does a colonoscopy cost in Washington?

Across 64 Washington hospitals that publish prices, a colonoscopy ranges from $100 to $36,803, with a median of $772. Most facilities fall between $326 and $1,018. What you pay depends on the facility, your insurance, and whether you have met your deductible.

Where is the cheapest place to get a colonoscopy in Washington?

Based on declared prices, the lowest-cost facility in our Washington data is Mid-Valley Hospital in Omak at about $201. By metro, Snoqualmie has the lowest median ($526). Freestanding ambulatory surgery and imaging centers are often cheaper still and may not appear in hospital price data - ask your doctor whether one is an option.

Why is a colonoscopy so much cheaper at some Washington hospitals?

Prices vary up to 368× because each hospital sets its own list price, cash discount, and insurer-negotiated rates. In Washington, the median cash (self-pay) price is $772 versus a median negotiated rate of $177 - about 4.4× higher. Asking for the cash price or your insurer's negotiated rate is often the single biggest lever on what you pay.

How much will I actually pay out of pocket for a colonoscopy in Washington?

Your out-of-pocket cost depends on your deductible, coinsurance, out-of-pocket maximum, and whether the facility is in-network - not just the sticker price. If you have not met your deductible, you will typically pay the negotiated rate in full until you do. Use the CostKits cost forecaster to estimate your specific out-of-pocket amount before you go.

CostKits compiles hospital price transparency data to help families make informed decisions. Track and manage your healthcare costs (free account).