WILLIAM EARL MAES MD
NPI 1114488525
Family Medicine in Seattle, WA

Q: What is William Maes's NPI number?

The NPI number for William Maes is 1114488525. It was assigned to this individual provider in the NPPES registry on March 28, 2019.

Q: What is William Maes's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Q: When was this NPI record last updated?

The NPPES record for William Maes was last updated on March 17, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since March 28, 2019PECOS EnrolledAccepts Medicare Assignment

9245 RAINIER AVE S, SEATTLE, WA 98118(206) 722-8444(206) 721-6310 Get Directions Write a Review

NPPES record last updated: March 17, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Mar 17, 2026, Jan 6, 2023 (2 updates tracked since 2023).

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About William Earl Maes Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

WILLIAM EARL MAES MD (NPI 1114488525) is an individual family medicine provider in Seattle, Washington, licensed in Washington (MD61476823) and active in the NPI registry since March 2019. He is enrolled in Medicare PECOS, is affiliated with Swedish Medical Center, and maintains a secondary practice location in Vallejo.

NPPES Registry Identity

NPI1114488525

Entity TypeIndividualMale

Primary Taxonomy207Q00000X

Provider Legal NameWILLIAM EARL MAESCredential: MD

Location Address9245 RAINIER AVE SSeattle, WA 98118-5569

Mailing Address1200 12th Ave S Ste 901Seattle, WA 98144-2712 · (920) 737-3656

Phone(206) 722-8444

Fax(206) 721-6310

Sole ProprietorNo

Medical School CMSOtherGraduated 2019

Enumeration DateMarch 28, 2019

Last NPPES UpdateMarch 17, 20262 updates tracked since enumeration

NPPES CertifiedMarch 17, 2026

✔ NPI 1114488525 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207Q00000X

License✔ Licensed in WA · MD61476823

Definition

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.

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X

9245 RAINIER AVE S, Seattle, WA 98118

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Secondary Practice Location 1

Location 1975 Sereno Dr, Family Medicine DepartmentVallejo, CA 94589-2441 · Phone (707) 651-4071

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Premera Blue Cross Blue Shield of Alaska, Providence Health Plan.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

William Earl Maes Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3375911878

PECOS Enrollment IDI20231218003486

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Swedish Medical Center

Acute Care Hospitals · Seattle, WA

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number500027

Location747 BroadwaySeattle, WA 98122 · King County

Emergency services Birthing friendly

Valley Medical Center

Acute Care Hospitals · Renton, WA

2/5 CMS rating

OwnershipGovernment - Hospital District or Authority

CMS Certification Number500088

Location400 S 43rd StRenton, WA 98055 · King County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 98118 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$97.43 typical visit price

range $63.67 – $189.37

Typical copayment $24.35 (range $15.91 – $47.34)

Most-billed visit code 99203

Established Patient

$111.00 typical visit price

range $21.12 – $155.00

Typical copayment $27.75 (range $5.28 – $38.75)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. JENNIFER CHRISTINE DANIELS ND, ARNP

Nurse Practitioner (Family)