Doctor profile · Federal record

Dr. William Maes, MD

Family Medicine Physician (CMS: Family Practice) · Student in an Organized Health Care Education/Training Program · Seattle, WA

  • NPI 1114488525
  • Accepts Medicare
  • 7 yrs in practice
  • Male
  • Group practice
  • No sanctions

Practice & contact

Operates at 2 locations .

NPPES Updated May 11, 2026
Primary practice
9245 Rainier Ave S
Seattle, WA 981185569
(206) 722-8444
fax (206) 721-6310
Additional location
975 Sereno Dr, Family Medicine Department
Vallejo, CA 945892441
(707) 651-4071
Mailing address
1200 12Th Ave S Ste 901
Seattle, WA 981442712

Credentials & registration

NPPES · NUCC
NPI registered
March 2019 — 7 yrs on file
Profile last updated
March 17, 2026
Year of graduation
2019 — 7 yrs since
Specialty taxonomy
207Q00000X — NUCC code
State license (1)
Washington #MD61476823

Federal sanctions & exclusions

OIG LEIE Updated May 11, 2026

No sanctions, exclusions or revocations on file

Checked against OIG LEIE on NPI 1114488525. Last verified May 11, 2026.

Medicare procedures · 2023

Top services delivered

CMS Provider Utilization
Total services
13
Distinct HCPCS
1
Medicare allowed
$1,134
HCPCS Description Services Patients Avg allowed
99238 Hospital discharge day management, 30 minutes or less 13 13 $87

In context: peer comparison

Among 154 peers in this city , average services per provider: 61. This provider delivers 0.2× the peer median.

Medicare Part D · 2023

Top prescriptions

CMS Part D Prescriber
Total claims
175
Patients
64
Total drug cost
$2,871
Drug Type Claims Patients Total cost
Atorvastatin Calcium Generic 43 20 $1,068
Pantoprazole Sodium Generic 20 15 $225
Cefpodoxime Proxetil Generic 18 18 $427
Metoprolol Tartrate Generic 18 11 $156
Clopidogrel (Clopidogrel Bisulfate) Brand 15 0 $270
Lisinopril Generic 14 0 $149
Amlodipine Besylate Generic 12 0 $127
Losartan Potassium Generic 12 0 $135
Metoprolol Succinate Generic 12 0 $180
Tamsulosin Hcl Generic 11 0 $135

Frequently asked questions

Auto-generated from federal data
What is Dr. William Maes's medical specialty?
Dr. William Maes practices Family Medicine Physician in Seattle, WA.
Where does Dr. William Maes practice?
Dr. William Maes practices at 9245 Rainier Ave S, Seattle, WA 981185569. Office phone: 2067228444.
What is Dr. William Maes's NPI?
Dr. William Maes's National Provider Identifier (NPI) is 1114488525, issued by NPPES.
Does Dr. William Maes accept Medicare assignment?
Yes. Dr. William Maes accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. William Maes commonly perform?
Top Medicare-reported procedures in 2023: Hospital discharge day management (HCPCS 99238). Source: CMS Medicare Physician & Other Practitioners file.