Allergy Shots in Washington State: What to Know
Washington's Cascade Range divides the state into two distinct allergy zones: western Washington with heavy alder, birch, and year-round mold from marine moisture, and eastern Washington with sagebrush, agricultural dust, and intense grass pollen from bluegrass seed fields. Spokane ranks #9 on.
Top Allergens in Washington
The most common allergens affecting residents of Washington, ranked by severity and seasonal impact.
Grass Pollen
SevereWashington is a major Kentucky bluegrass turf-seed producer in the eastern part of the state, and pollen also drifts north from Oregon's Willamette Valley. Spokane jumped to AAFA #9 in 2026, and Seattle hit a record 1,998 ppm in May 2024.
Major grass-seed production state
Red Alder
SevereRed alder dominates streamsides and second-growth forests throughout western Washington, producing the earliest and heaviest tree pollen in Puget Sound with counts often exceeding 600 grains per cubic meter at Seattle's NAB station.
Earliest and heaviest tree pollen in Puget Sound
Birch
SevereThe third most abundant pollen in Seattle per WA DOH data, birch is highly allergenic with strong oral allergy cross-reactivity. Washington DOH projects birch pollen could increase 8x by end of century.
8x projected increase by end of century
Western Red Cedar
ModerateIconic to Pacific Northwest forests and very common in Puget Sound landscaping, western red cedar is grouped with juniper and cypress as a major early-spring tree pollen source.
Common in Puget Sound urban landscaping
Douglas Fir
ModerateWashington's state tree blankets western Washington and produces extraordinary pollen volumes visible as yellow dust during its two- to four-week peak.
State tree with extraordinary pollen volumes
Cladosporium / Alternaria Mold
ModeratePuget Sound's wet maritime climate creates persistent high mold spore counts year-round in western Washington, with outdoor peaks from July through November.
Year-round in western WA
When Allergies Peak in Washington
Month-by-month allergy intensity for the most common local allergens.
| Allergen | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Grass pollen | ||||||||||||
| Alder | ||||||||||||
| Birch | ||||||||||||
| Western Red Cedar | ||||||||||||
| Douglas Fir | ||||||||||||
| Cladosporium/Alternaria |
Why Allergies Are Worse in Washington
Washington's Cascade Range creates one of the sharpest climate divides in the continental U.S., producing dramatically different allergy environments on each side. Western Washington's marine moisture fuels mold and tree pollen, while eastern Washington's dry shrub-steppe drives grass, sagebrush, and dust allergies.
Puget Sound Marine Layer
Cool, persistently damp marine climate keeps surfaces and forest litter wet much of the year, driving heavy outdoor and indoor mold loads including Cladosporium, Aspergillus, and Alternaria.
Alder and Birch Spring Surge
Red alder is the dominant early-spring allergen across the Pacific Northwest, with peak pollen February through April. Combined with birch, it triggers severe spring rhinitis and oral allergy syndrome around Puget Sound.
Cascade Rain Shadow
The Cascades create a sharp wet-west and dry-east divide: Seattle and Puget Sound have alder, Douglas fir, and mold while Yakima, Tri-Cities, and the Columbia Plateau have sagebrush, agricultural dust, and wheat-belt pollen.
Summer Wildfire Smoke
Smoke from Cascade, eastern Washington, and cross-border British Columbia fires routinely pushes Seattle and Spokane into unhealthy AQI ranges July through September, worsening asthma and allergen sensitivity.
Regional Differences
Puget Sound / Western Washington
Long, intense tree-pollen spring layered with year-round mold from chronic moisture. Cool damp summers extend the grass season beyond typical inland patterns.
Cascades (Mountain)
Conifer-dominated zone with a short, intense pollen season and snowmelt-driven mold. Lower population but recreational exposure is significant.
Eastern Washington / Columbia Plateau
Dry, windy shrub-steppe with significant wind-blown dust and agricultural pollen from wheat and alfalfa fields, plus weed allergens from disturbed rangeland.
Allergy Shot Costs in Washington
What you can expect to pay for traditional allergy shots in Washington, compared to Curex at-home immunotherapy.
Traditional Allergy Shots in Washington
Based on 2025 Fair Health data for Washington
- No office visits needed
- At-home allergy test included
- Personalized sublingual drops
- Ships to all 50 states
- Cancel anytime
Traditional allergy shot costs in Washington range from $2,500 to $5,000 in the first year without insurance, with Seattle tech-corridor wages pushing costs 10-15% above the national average. Eastern Washington cities like Spokane track closer to baseline. Curex offers sublingual immunotherapy starting at $59 per month with no office visits required, a fraction of the cost of weekly in-office shots.
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See if at-home allergy shots fit your allergies — a 2-minute quiz, designed by board-certified allergists, with flat monthly pricing and no clinic visits.
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Insurance Coverage in Washington
Washington's insurance market features Premera Blue Cross and Regence BlueShield as the dominant carriers, with Kaiser Permanente Washington, Molina, and Coordinated Care also well represented. Washington has among the strongest prior authorization reform laws in the nation.
Apple Health (Washington Medicaid) covers allergy testing and immunotherapy through five integrated MCOs: Wellpoint, Community Health Plan of WA, Coordinated Care of WA (Centene), Molina, and UnitedHealthcare Community Plan.
Curex accepts most major Washington insurance plans and is HSA/FSA eligible. At $59/month without insurance, it costs less than a single allergist visit in most Washington cities.
Allergy Shots by City in Washington
Explore city-specific allergy data and treatment costs across Washington.
Washington vs. Neighboring States
How allergy costs and severity compare across the region.
| Metric | WashingtonYOU | Idaho | Oregon |
|---|---|---|---|
| #1 Allergen | Alder/Birch/Grass | Sagebrush/Grass/Juniper | Grass/Alder/Birch |
| Allergy Severity Rank | Spokane #9 (2026); Seattle #45 (2026) | Boise #1 (2026) | Portland #38 (2026) |
| Avg. Allergist Visit | $220-$450 | $190-$400 | $215-$440 |
| Annual Shot Cost | $1,600-$4,000 | $1,400-$3,600 | $1,600-$4,000 |
| Peak Pollen Season | Feb-Jul | Apr-Sep | Feb-Jul |
| Medicaid Program | Apple Health | Idaho Medicaid | Oregon Health Plan |
- #1 Allergen
- Alder/Birch/Grass
- Allergy Severity Rank
- Spokane #9 (2026); Seattle #45 (2026)
- Avg. Allergist Visit
- $220-$450
- Annual Shot Cost
- $1,600-$4,000
- Peak Pollen Season
- Feb-Jul
- Medicaid Program
- Apple Health
- #1 Allergen
- Sagebrush/Grass/Juniper
- Allergy Severity Rank
- Boise #1 (2026)
- Avg. Allergist Visit
- $190-$400
- Annual Shot Cost
- $1,400-$3,600
- Peak Pollen Season
- Apr-Sep
- Medicaid Program
- Idaho Medicaid
- #1 Allergen
- Grass/Alder/Birch
- Allergy Severity Rank
- Portland #38 (2026)
- Avg. Allergist Visit
- $215-$440
- Annual Shot Cost
- $1,600-$4,000
- Peak Pollen Season
- Feb-Jul
- Medicaid Program
- Oregon Health Plan
Skip the Washington allergist. Treat from home.
Curex delivers personalized sublingual immunotherapy drops to your door. No weekly office visits, no needles, no surprise bills — just one flat rate of $59/mo.
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Allergy Shot Resources
Allergy Shots in Oakland
Guide to allergy shots in Oakland. Top local allergens, costs ($260–$400/visit), California insurance coverage, and Curex at-home alternative.
Allergy Shots in San Jose
Guide to allergy shots in San Jose. Top local allergens, costs ($270–$400/visit), California insurance coverage, and Curex at-home alternative.
Allergy Shots in Stockton
Guide to allergy shots in Stockton. Top local allergens, costs ($180–$290/visit), California insurance coverage, and Curex at-home alternative.
Allergy Shots in Irvine
Guide to allergy shots in Irvine. Top local allergens, costs ($260–$400/visit), California insurance coverage, and Curex at-home alternative.
Allergy Shots in San Bernardino
Guide to allergy shots in San Bernardino. Top local allergens, costs ($180–$300/visit), California insurance coverage, and Curex at-home alternative.
Allergy Shot FAQ for Washington
When is allergy season in Washington?
Washington's allergy season runs from February through October, varying dramatically between the wet west and dry east sides of the Cascades. Western Washington sees alder and birch from February through May, Douglas fir in April and May, grass from May through July, and year-round mold. Eastern Washington adds sagebrush and Russian thistle from August through October, with intense grass pollen from bluegrass seed fields in the Spokane and Columbia Basin areas.
How much do allergy shots cost in Washington?
Without insurance, a typical allergist visit in Washington costs $200 to $370, skin testing runs $400 to $1,050, and each shot visit costs $60 to $140. First-year total costs range from $2,500 to $5,000, with Seattle running 10-15% above the national average due to tech-corridor wages. Eastern Washington cities like Spokane track closer to baseline. With insurance, first-year out-of-pocket costs typically drop to $950 to $2,200.
Does Apple Health cover allergy shots?
Yes, Apple Health (Washington Medicaid) covers allergy testing and immunotherapy through five integrated MCOs: Wellpoint, Community Health Plan of WA, Coordinated Care of WA (Centene), Molina, and UnitedHealthcare Community Plan. Washington's HB 1357 (2023) provides among the strongest prior authorization reform protections in the nation.
What are the worst cities for allergies in Washington?
Spokane jumped to #9 on AAFA's 2026 Allergy Capitals list, driven by its combination of grass-seed-field pollen, ponderosa pine, and wildfire smoke east of the Cascades. Seattle ranks #45 in 2026, with a record pollen count of 1,998 ppm recorded in May 2024. The Cascade rain shadow creates two distinct allergy zones, with western cities facing alder and mold while eastern cities face sagebrush, agricultural dust, and grass.
Can I get allergy treatment at home in Washington?
Yes, Curex offers at-home allergy treatment for Washington residents. After an initial telehealth consultation with a board-certified allergist, a comprehensive at-home allergy test kit is shipped to your door. Based on your results, a personalized sublingual immunotherapy plan is created and the allergy drops are delivered monthly starting at $59. There are no needles and no weekly office visits.
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This content is for informational purposes only and does not constitute medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with questions about a medical condition. Content reviewed by board-certified allergists at Curex.