Sonja Maddox, MD
Sonja Maddox, MD practices as part of a group family medicine physician practice in Renton, WA. She graduated from University of Washington School of Medicine in 1999 and has 27+ years of clinical experience. She regularly sees Medicare patients with high cholesterol, hypertension, and arthritis (per CMS claims data).
At a glance
- Uses generic medications more than 43% of reporting doctors in Washington
- Virtual visits available — no app or travel required
Older · 1786dNPPES updated 2021-06-16 · verify NPI on CMS · Verify license at Washington Medical Commission
How Does This Doctor Compare?
Based on Medicare data, this doctor favors affordable generic drugs over brand-name ones.
Generic Rx
↑ Higher = better88.3%
Washington avg: 85.1 · US avg: 82.8
✓ Higher than most doctors nationally(+5.5 pts)
Typical range among reporting doctors in WashingtonHow often this doctor prescribes affordable generic drugs instead of expensive brand-name ones.
Medicare Patients
93
Unique beneficiaries
Standard volumePrescription Recipients
205
Patients prescribed
Prescriptions Written
1,993
Total claims
Total Medicare drug cost: $243k
Percentile rankings compared against 1,521 reporting peers in Washington.
Data Note: Sourced from CMS Medicare Provider Utilization & Payment Data. Percentile rankings compare this provider against all peers with reported data in the same state. Updated annually to reflect the latest federal reporting cycle.
What This Doctor Treats Most
Based on Medicare claims data — here's what patients commonly see this doctor for
Based on Medicare data, this doctor primarily manages High Cholesterol, Hypertension, and Arthritis.
Elevated cholesterol or triglycerides that increase heart disease risk
US avg: 70.4%↑ More patients than average (+5%) — a focus area for this doctor
High blood pressure — a leading risk factor for heart disease and stroke
US avg: 70.2%↓ Fewer patients than average (-3%) — less common here
Joint inflammation causing pain, swelling, and stiffness
US avg: 49.3%↓ Fewer patients than average (-7%) — less common here
A condition where the body cannot properly regulate blood sugar levels
US avg: 34.5%↓ Fewer patients than average (-4%) — less common here
Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.
$19 received from industry
1 transaction reported in 2024 ·Low tier
Payments include consulting fees, speaking honoraria, food & beverage, travel, research support, and ownership interests from drug and medical device manufacturers. Disclosure is required by the federal Physician Payments Sunshine Act. These payments do not necessarily indicate conflicts of interest. National median: $338 across 136 000 tracked providers.
Tiers — Low: under $500 · Moderate: $500-5 000 · High: $5 000-25 000 · Very High: $25 000+. Source: CMS Open Payments 2024, attributed to Sonja Maddox's NPI.
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Background & Specialty
Education, training, and specialty classification from CMS NPPES and Medicare records.
Graduated medical school · 1999
University of Washington School of Medicine
Board certified · Jun 15, 2021
Self-reported via NPPES
27 years in practice
Experienced
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
Taxonomy: 207Q00000X
Education & Training
University of Washington School of Medicine (Class of 1999)
Virtual Family Medicine Care With Sonja Maddox
NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.
Schedule a virtual visit with Sonja Maddox for cholesterol management, blood pressure monitoring, arthritis follow-ups — no travel to Renton required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes. Medicare enrolled per CMS records.
Frequently Asked Questions
Common questions about Sonja Maddox
Dr. Maddox is listed as active in the NPI registry with telehealth listed in Renton, WA. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (425) 227-3700.
Sourced from CMS NPPES · OIG LEIE · CMS Medicare Part D · CMS Open Payments 2024 · CMS Physician Comparator. See Data Methodology.
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Contact Sonja Maddox
Practice Location
601 S Carr Rd Suite 100, Renton, WA 98055-5866
Mailing Address
601 S Carr Rd Suite 100, Renton, WA 98055-5866
This is a provider directory. Contact the office directly to schedule appointments.
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