Top billers · Surgical Pathology · Washington

Who bills surgical pathology in Washington?

In 2024, 340 providers billed Medicare for surgical pathology, special stains, and immunohistochemistry in Washington: 523,787 services and an estimated $20.4M in Medicare payments. Below: the top 5 by service volume, straight from CMS's public billing data.

The list

The top 5 surgical pathology billers in Washington.

Ranked by 2024 Medicare service volume across the family's codes.

#	Provider	Specialty	City	Services	Est. Medicare paid
1	Gregory Wolgamot, M.D., PHD	Pathology	Bellingham	15,744	$736K
2	Maria Isales, MD	Pathology	Seattle	15,145	$1.0M
3	Laboratory Corporation Of America	Clinical Laboratory	Seattle	13,296	$587K
4	John Walsh, M.D.	Dermatology	Bellevue	12,307	$643K
5	Alden Webb, D.O.	Pathology	Liberty Lake	9,526	$467K

That's the top 5. 335 more providers billed surgical pathology in Washington in 2024. The full ranked list, with year-over-year history, group affiliations, and phone numbers, is one search in Prospect 811.

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The breakdown

What's behind the number.

Top codes in Washington

88305Pathology examination of tissue using a microscope, intermediate complexity349,751

88341Special stained specimen slides to examine tissue, each additional procedure71,203

88342Special stained specimen slides to examine tissue, initial procedure40,808

88307Pathology examination of tissue using a microscope, moderately high complexity20,952

88304Pathology examination of tissue using a microscope, moderately low complexity14,755

88313Special stained specimen slides to examine tissue including interpretation and report13,565

Top specialties billing it

Pathology241 providers

Dermatology60 providers

Gastroenterology21 providers

Clinical Laboratory7 providers

Where the billers are

Seattle146 providers

Spokane Valley54 providers

Everett24 providers

Bellingham18 providers

Vancouver13 providers

City breakdown

The top surgical pathology cities in Washington.

The same 2024 Medicare data, sliced by city: the biggest surgical pathology cities by number of billers, in est.-Medicare-paid order.

In 2024 the top city for surgical pathology in Washington by est. Medicare paid was Seattle: 146 providers billed 153,122 services for an estimated $5.4M, led by Maria Isales, MD, with 15,145 services (est. $1.0M Medicare paid).

#	City	Billers	Services	Est. Medicare paid	City leader (2024)
1	Seattle	146	153,122	$5.4M	Maria Isales, MD · 15,145 services · est. $1.0M
2	Spokane Valley	54	106,161	$4.0M	Kara Phelps, MD · 5,371 services · est. $149K
3	Bellingham	18	52,368	$2.0M	Gregory Wolgamot, M.D., PHD · 15,744 services · est. $736K
4	Everett	24	12,429	$486K	Luan Nguyen · 2,168 services · est. $56K
5	Vancouver	13	15,894	$468K	Katherine Boyd, MD · 3,266 services · est. $94K

City totals are cut from the same public CMS data as everything above: Medicare fee-for-service only, after CMS's under-11-beneficiary suppression, dollars always est. Medicare paid. Where a city shows fewer than 3 billers, we show the totals and name no one. Naming is capped by design: up to 5 ranked billers above plus at most one leader per city here, and no one else on this page.

Where these numbers come from. Everything on this page is computed from CMS's public Medicare Provider Utilization & Payment data for 2024, the most recent year CMS has released. It covers traditional Medicare fee-for-service only (no commercial insurance, no Medicare Advantage). CMS suppresses any provider-and-code line with fewer than 11 beneficiaries before publishing, so low-volume billers don't appear at all. "Est. Medicare paid" is each billing line's average Medicare payment multiplied by its service count, summed. One service is one specimen exam or stain as billed to Medicare. Prospect 811 organizes public data; it doesn't add to or alter it. Not affiliated with or endorsed by CMS. Full detail on the data page.

This is one code family, one state, one year.

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