Labcorp at 16259 Sylvester Rd SW, Suite 402, Seattle, WA
Labcorp patient service center, 10 miles from downtown Seattle. Open Mon–Fri 7:00AM – 5:00PM · Sat 8:00AM – 12:00PM · Sun closed. Order your tests on TestWell, choose Labcorp at checkout, and walk in with the emailed requisition and a photo ID — no doctor's visit, referral or insurance; results post to your portal in 1–3 business days. Address, phone and hours were read from the lab's listing on October 10, 2026.
- Address
- 16259 Sylvester Rd SW, Suite 402, Seattle, WA 98166
- Phone
- 206-241-4554
- Appointment
- Walk-ins at most sites · book on Labcorp's site to skip the wait
Hours at Labcorp, 16259 Sylvester Rd SW
As listed by the lab on October 10, 2026; confirm before a holiday or Saturday visit.
| Monday | 7:00AM – 5:00PM |
|---|---|
| Tuesday | 7:00AM – 5:00PM |
| Wednesday | 7:00AM – 5:00PM |
| Thursday | 7:00AM – 5:00PM |
| Friday | 7:00AM – 5:00PM |
| Saturday | 8:00AM – 12:00PM |
| Sunday | Closed |
How to get a blood test at this Labcorp location
- Choose your tests and check out, picking Labcorp as your lab. A licensed physician authorizes the order, usually within minutes, and the requisition is emailed to you — one $6 lab processing fee per order, nothing to pay here.
- Come to 16259 Sylvester Rd SW, Suite 402 during the hours above with the requisition (on your phone is fine) and a photo ID. Fasting tests are easiest first thing in the morning.
- Results post to your TestWell portal in 1–3 business days with reference ranges and a physician review; download the report to share with your own doctor.
Popular tests drawn at Labcorp in Seattle — prices at Labcorp
The tests TestWell customers order most nationally, September 2025 – September 2026, priced for a Labcorp draw. Plus one $6 fee per order.
| Test | Price at Labcorp | Share of orders |
|---|---|---|
| Comprehensive Metabolic Panel | $22.99 | 9.7% |
| Tuberculosis (TB) Blood Test | $91.99 | 7.6% |
| IGF-1 (Insulin-like Growth Factor) | $37.99 | 6.6% |
| TSH + Free T4 | $39.99 | 5.8% |
| CBC with Differential | $21.99 | 5.6% |
| Hemoglobin A1c | $22.99 | 5.3% |
Other locations near 16259 Sylvester Rd SW, Suite 402
- Quest Diagnostics5.1 mi
1412 SW 43rd St, SUITE 101, Renton, WA 98057
Weekdays 7:30AM – 4:30PM
- Labcorp6.1 mi
4033 Talbot Rd S, Renton, WA 98055
Weekdays 7:30AM – 5:30PM · Sat 9:00AM – 1:00PM
- Labcorp10.5 mi
550 17th Ave, Ste 200, Seattle, WA 98122
Weekdays 8:30AM – 12:00PM & 1:00PM – 5:00PM
- Labcorp10.6 mi
1229 Madison St, Ste 610, Seattle, WA 98104
Weekdays 7:30AM – 4:30PM · Sat 8:00AM – 12:00PM
- Quest Diagnostics10.6 mi
1101 Madison St, Suite 1210, Seattle, WA 98104
Weekdays 7:00AM – 4:00PM
- Labcorp13.6 mi
1200 116th Ave NE, Ste A, Bellevue, WA 98004
Weekdays 8:00AM – 4:30PM
Frequently asked questions
- What are the hours at Labcorp 16259 Sylvester Rd SW in Seattle?
- Mon–Fri 7:00AM – 5:00PM · Sat 8:00AM – 12:00PM · Sun closed (as listed by the lab on 2026-10-10). Hours change around holidays — confirm before a Saturday or early-morning visit at 206-241-4554.
- Is Labcorp 16259 Sylvester Rd SW open on Saturday?
- Yes — Saturday hours are 8:00AM – 12:00PM as of 2026-10-10. Saturday mornings fill up; an appointment on Labcorp's site shortens the wait.
- Do I need an appointment at Labcorp 16259 Sylvester Rd SW?
- Most Labcorp patient service centers take walk-ins, and Labcorp lets you book a time slot on its site, which shortens the wait at busy locations. Bring a photo ID and your requisition — through TestWell it arrives by email within minutes of the physician's authorization, and it is accepted here as written.
- Can I get blood work at this Labcorp location without a doctor?
- Yes, with a requisition: Labcorp draws what a requisition orders but does not write orders. Order on TestWell — a licensed physician in our network authorizes it as part of the price, with one $6 lab processing fee per order — choose Labcorp at checkout, and walk in here. No insurance, referral or office visit; HSA and FSA cards are accepted.
- How much does a blood test cost at Labcorp in Seattle?
- Through TestWell the price is the test's listed price plus one $6 fee per order, with nothing to pay at the draw. For example, Comprehensive Metabolic Panel is $22.99, Tuberculosis (TB) Blood Test is $91.99, IGF-1 (Insulin-like Growth Factor) is $37.99 drawn at Labcorp. Ordered through a doctor and billed to insurance, your share depends on your plan.
- What is the phone number for Labcorp 16259 Sylvester Rd SW, Seattle?
- 206-241-4554. Phone and hours were read from the lab's listing on 2026-10-10.