Lab tests CPT 82140 Washington Outpatient

Ammonia test cost in Washington

In Washington, 59 hospitals publish a cash price for ammonia blood test: from $14.70 to $280.05, with a median of $114.40. The lowest price is at Providence St Mary Medical Center (Walla Walla). The highest price is 19.1× the lowest.

Outpatient cash prices, one line per hospital — its lowest listed price for code 82140. Prices for both sides of the body and inpatient prices are not mixed in. Collected Sep 29, 2026. See them on a map

Lowest$14.70Providence St Mary Medical Center

Median$114.40half pay less

Highest$280.05in Washington

Lowest saves$99.70vs the median

Hospitals in Washington, cheapest first

Hospital	Cash price	List price	File date
Providence St Mary Medical Center lowest Walla Walla · Walla Walla, WA HC ASSAY OF AMMONIA LAB	$14.70	$21.00	Apr 1, 2026 source file
Legacy Salmon Creek Medical Center Vancouver · Portland-Vancouver-Hillsboro, OR-WA HC AMMONIA	$24.08	$37.04	Apr 1, 2026 source file
Kittitas County Public Hospital Dist 1 Ellensburg · Ellensburg, WA Ammonia level	$27.84	$32.75	Feb 4, 2026 source file
Lourdes Health Pasco · Kennewick-Richland, WA ASSAY OF AMMONIA	$46.56	$116.39	— source file
Virginia Mason Medical Center Seattle · Seattle-Tacoma-Bellevue, WA AMMONIA SERUM	$57.12	$112.00	— source file
Confluence Health Hospital Wenatchee · Wenatchee-East Wenatchee, WA HC Assay of Ammonia	$62.10	$69.00	— source file
Prosser Memorial Health Hospital Prosser · Kennewick-Richland, WA HC ASSAY OF AMMONIA #	$63.25	$115.00	— source file
Saint Clare Hospital Lakewood · Seattle-Tacoma-Bellevue, WA HC AMMONIA-ARTERIAL BLOOD	$63.42	$219.99	Feb 28, 2026 source file
St Anthony Hospital Gig Harbor · Seattle-Tacoma-Bellevue, WA HC AMMONIA-ARTERIAL BLOOD	$66.91	$219.99	Feb 28, 2026 source file
Highline Medical Center Burien · Seattle-Tacoma-Bellevue, WA HC AMMONIA-ARTERIAL BLOOD	$67.18	$219.99	Feb 28, 2026 source file
St Francis Community Hospital Federal Way · Seattle-Tacoma-Bellevue, WA HC AMMONIA-ARTERIAL BLOOD	$69.04	$219.99	Feb 28, 2026 source file
St Joseph Medical Center Tacoma · Seattle-Tacoma-Bellevue, WA HC AMMONIA-ARTERIAL BLOOD	$72.87	$219.99	Feb 28, 2026 source file
Snoqualmie Valley Hospital Snoqualmie · Seattle-Tacoma-Bellevue, WA Facility Fee HC AMMONIA, PLASMA-LC	$74.63	$128.67	— source file
Overlake Medical Center & Clinics Bellevue · Seattle-Tacoma-Bellevue, WA Hc Assay Of Ammonia	$75.50	$151.00	Apr 1, 2026 source file
St Elizabeth Hospital Enumclaw · Seattle-Tacoma-Bellevue, WA HC AMMONIA-ARTERIAL BLOOD	$77.74	$219.99	Feb 28, 2026 source file
Willapa Harbor Hospital South Bend · South Bend, WA AMMONIA LEVEL	$79.80	$114.00	— source file
Prov Sacred Hrt Medical Center & Childs Hospital Spokane · Spokane-Spokane Valley, WA HC ASSAY OF AMMONIA LAB	$82.60	$118.00	Apr 1, 2026 source file
Providence St Luke's Rehabilitation Medical Center Spokane · Spokane-Spokane Valley, WA HC ASSAY OF AMMONIA LAB	$88.20	$126.00	Apr 1, 2026 source file
Valley Medical Center Renton · Seattle-Tacoma-Bellevue, WA Assay of Ammonia	$88.20	$126.00	— source file
Quincy Valley Medical Center Quincy · Moses Lake, WA Ammonia level	$93.59	$93.59	May 27, 2026 source file
Summit Pacific Medical Center Elma · Aberdeen, WA Ammonia level	$96.66	$179.00	Aug 31, 2026 source file
St. Michael Medical Center Silverdale · Bremerton-Silverdale-Port Orchard, WA HC AMMONIA-ARTERIAL BLOOD	$97.10	$219.99	Feb 28, 2026 source file
PeaceHealth Peace Island Medical Center Friday Harbor · Friday Harbor, WA AMMONIA LEVEL	$102.70	$158.00	— source file
Swedish Edmonds Edmonds · Seattle-Tacoma-Bellevue, WA HC ASSAY OF AMMONIA LAB	$105.60	$220.00	Apr 1, 2026 source file
Swedish Issaquah Issaquah · Seattle-Tacoma-Bellevue, WA HC ASSAY OF AMMONIA LAB	$105.60	$220.00	Apr 1, 2026 source file
Swedish Medical Center Seattle · Seattle-Tacoma-Bellevue, WA HC ASSAY OF AMMONIA LAB	$105.60	$220.00	Apr 1, 2026 source file
Swedish Medical Center / Cherry Hill Seattle · Seattle-Tacoma-Bellevue, WA HC ASSAY OF AMMONIA LAB	$105.60	$220.00	Apr 1, 2026 source file
Olympic Medical Center Port Angeles · Port Angeles, WA Ammonia level	$107.20	$134.00	Jun 24, 2026 source file
Kadlec Regional Medical Center Richland · Kennewick-Richland, WA HC ASSAY OF AMMONIA LAB	$114.10	$163.00	Apr 1, 2026 source file
Providence Regional Medical Center Everett Everett · Seattle-Tacoma-Bellevue, WA HC ASSAY OF AMMONIA LAB	$114.40	$220.00	Apr 1, 2026 source file
Whitman Hospital and Medical Center Colfax · Pullman, WA Ammonia level	$114.40	$143.00	Jun 29, 2026 source file
Pullman Regional Hospital Pullman · Pullman, WA Ammonia level	$114.75	$135.00	Jun 9, 2026 source file
Astria Sunnyside Hospital Sunnyside · Kennewick-Richland, WA Ammonia	$125.40	$220.00	— source file
Providence Centralia Hospital Centralia · Centralia, WA HC ASSAY OF AMMONIA LAB	$126.36	$243.00	Apr 1, 2026 source file
Providence St Peter Hospital Olympia · Olympia-Lacey-Tumwater, WA HC ASSAY OF AMMONIA LAB	$126.36	$243.00	Apr 1, 2026 source file
Shriners Childrens - Spokane Spokane · Spokane-Spokane Valley, WA AMMONIA LEVEL	$126.40	$126.40	— source file
Ocean Beach Hospital Ilwaco · Ilwaco, WA HC ASSAY OF AMMONIA CDM	$132.75	$177.00	— source file
Providence St Joseph Hospital Chewelah · Spokane-Spokane Valley, WA HC ASSAY OF AMMONIA LAB	$135.10	$193.00	Apr 1, 2026 source file
PeaceHealth United General Medical Center Sedro Woolley · Mount Vernon-Anacortes, WA AMMONIA LEVEL	$135.85	$209.00	— source file
Jefferson Healthcare Port Townsend · Port Townsend, WA Ammonia level	$136.80	$171.00	Aug 6, 2026 source file
Arbor Health Morton Hospital Morton · Centralia, WA Ammonia level	$140.12	$226.00	May 18, 2026 source file
Kaiser Permanente Central Hospital Seattle · Seattle-Tacoma-Bellevue, WA "LAB, AMMONIA"	$147.20	$184.00	Apr 1, 2026 source file
Klickitat Valley Hospital Goldendale · Goldendale, WA AMMONIA	$152.00	$190.00	Dec 2, 2024 source file
Cascade Medical Center Leavenworth · Wenatchee-East Wenatchee, WA Assay of ammonia	$153.60	$192.00	— source file
PeaceHealth St John Medical Center Longview · Longview-Kelso, WA AMMONIA LEVEL	$160.55	$247.00	— source file
Cascade Valley Hospital Arlington · Seattle-Tacoma-Bellevue, WA HC AMMONIA	$162.40	$203.00	— source file
Lincoln Hospital Davenport · Davenport, WA Ammonia level	$166.59	$185.10	Sep 14, 2026 source file
Skagit Valley Hospital Mount Vernon · Mount Vernon-Anacortes, WA HC AMMONIA	$172.00	$215.00	— source file
PeaceHealth St Joseph Medical Center Bellingham · Bellingham, WA AMMONIA LEVEL	$172.90	$266.00	— source file
Astria Toppenish Hospital Toppenish · Yakima, WA Ammonia, Plasma	$174.20	$268.00	— source file
Providence Mount Carmel Hospital Colville · Spokane-Spokane Valley, WA HC ASSAY OF AMMONIA LAB	$186.90	$267.00	Apr 1, 2026 source file
PeaceHealth Southwest Medical Center Vancouver · Portland-Vancouver-Hillsboro, OR-WA AMMONIA LEVEL	$195.00	$300.00	— source file
Seattle Children's Hospital Seattle · Seattle-Tacoma-Bellevue, WA Ammonia Level 4 Post	$195.10	$195.10	— source file
Samaritan Hospital Moses Lake · Moses Lake, WA Ammonia level	$196.00	$196.00	— source file
Forks Community Hospital Forks · Port Townsend, WA Ammonia level	$202.40	$253.00	Jul 9, 2026 source file
Othello Community Hospital Othello · Othello, WA Ammonia level	$205.50	$274.00	Jul 1, 2026 source file
Providence Holy Family Hospital Spokane · Spokane-Spokane Valley, WA HC ASSAY OF AMMONIA LAB	$214.20	$306.00	Apr 1, 2026 source file
Lake Chelan Community Hospital Chelan · Wenatchee-East Wenatchee, WA Ammonia level	$253.29	$253.29	Sep 1, 2026 source file
Mason General Hospital & Family of Clinics Shelton · Shelton, WA Ammonia Level	$280.05	$373.40	— source file

By metro area

Each metro page compares every listing, including prices for both sides of the body.

Metro area	Hospitals	Lowest	Median
Seattle-Tacoma-Bellevue, WA	18	$57.12	$82.97
Spokane-Spokane Valley, WA	6	$82.60	$130.75
Kennewick-Richland, WA	4	$46.56	$88.68
Wenatchee-East Wenatchee, WA	3	$62.10	$153.60
Centralia, WA	2	$126.36	$133.24
Moses Lake, WA	2	$93.59	$144.80
Mount Vernon-Anacortes, WA	2	$135.85	$153.92
Port Townsend, WA	2	$136.80	$169.60
Portland-Vancouver-Hillsboro, OR-WA	2	$24.08	$109.54
Pullman, WA	2	$114.40	$114.58
Aberdeen, WA	1	$96.66	$96.66
Bellingham, WA	1	$172.90	$172.90
Bremerton-Silverdale-Port Orchard, WA	1	$97.10	$97.10
Davenport, WA	1	$166.59	$166.59
Ellensburg, WA	1	$27.84	$27.84
Friday Harbor, WA	1	$102.70	$102.70
Goldendale, WA	1	$152.00	$152.00
Ilwaco, WA	1	$132.75	$132.75
Longview-Kelso, WA	1	$160.55	$160.55
Olympia-Lacey-Tumwater, WA	1	$126.36	$126.36
Othello, WA	1	$205.50	$205.50
Port Angeles, WA	1	$107.20	$107.20
South Bend, WA	1	$79.80	$79.80
Shelton, WA	1	$280.05	$280.05
Walla Walla, WA	1	$14.70	$14.70
Yakima, WA	1	$174.20	$174.20

What it is

An ammonia test measures ammonia in the blood. It is used for confusion or drowsiness in people with liver disease and for some rare inherited disorders in newborns.

What the price covers

The price usually covers running the test. The blood draw (36415) is often billed as a separate line.

Ammonia blood test in other states

Median cash price across the state's hospitals.