The 61 best med spas in Mercer Island, WA (2026)

Botox in Mercer Island typically costs $10–$25 per unit. A full forehead treatment uses 20–50 units, so the total cost is usually $200–$1250 per session, depending on provider experience, injector credentials, and the specific neighborhood within Mercer Island, WA. Most med spas offer per-unit pricing transparently; watch out for "per area" quotes that can obscure your final cost.

MIYA Aesthetics & Wellness is the top-rated medical spa in Mercer Island, WA with a 5/5 rating across 214 verified patient reviews. Rankings on No BS Med Spa Reviews use a transparent priority score (rating × ln(review_count + 1)), so a clinic must combine strong ratings with meaningful review volume to reach the top. View MIYA Aesthetics & Wellness →

Med spa density in Mercer Island, WAis highest in these neighborhoods, which cluster the city's injectable, laser, and skincare providers.

• Downtown Mercer Island
• North Mercer Island
• South Mercer Island

1. Verify medical director credentials. A licensed physician (MD or DO) should oversee injectables and laser care; ask who the medical director is and confirm their license is active in WA.
2. Check before/after photos. Look for unretouched, consistent-lighting photos of patients with skin and anatomy similar to yours — not stock or marketing imagery.
3. Ask about product brands. Reputable Mercer Island med spas use FDA-approved injectables (Botox, Dysport, Juvéderm, Restylane, RHA). Ask to see the product box at the time of treatment.
4. Confirm pricing in writing. Get per-unit (not per-area) pricing for Botox, per-syringe pricing for fillers, and a written estimate for any package deal before paying.
5. Read recent reviews. Prioritize reviews from the last 12 months over older ones, and pay attention to how the clinic responds to negative feedback.