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ALEXANDER D. WIELAARD MD
NPI 1144438995
Emergency Medicine in Walnut, CA

Active since May 17, 2007PECOS Enrolled
88.06/100
CMS Quality Rating
340 S LEMON AVE, 9926, WALNUT, CA 91789(706) 306-4668 Get Directions Write a Review

NPPES record last updated: November 21, 2016. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Alexander D. Wielaard Md NPPES

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

ALEXANDER D. WIELAARD MD (NPI 1144438995) is an individual emergency medicine provider in Walnut, California, licensed in Maryland (D0071128) and active in the NPI registry since May 2007. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1144438995
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameALEXANDER D. WIELAARDCredential: MD
Location Address340 S LEMON AVE, 9926Walnut, CA 91789-2706
Mailing Address340 S Lemon Ave, 9926Walnut, CA 91789-2706 · (706) 306-4668
Phone(706) 306-4668
Sole ProprietorYes
Enumeration DateMay 17, 2007
Last NPPES UpdateNovember 21, 2016
✔ NPI 1144438995 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
Licenses✔ Licensed in MD · D0071128✔ Licensed in GU · M-2007
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
340 S LEMON AVE, Walnut, CA 91789
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Alexander D. Wielaard Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91789 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
$96.36 typical visit price
range $62.96 – $187.60
Typical copayment $24.09 (range $15.74 – $46.90)
Most-billed visit code 99203
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

88.06/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality87.23
Improvement Activities40
Cost74.73

Other Providers at the Same Location NPPES 5

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

SILVIA ARTERIA BOONE
Nurse's Aide
340 S LEMON AVE
WALNUT, CA 91789
Los Angeles County (408) 837-0116
AUTISM INTERVENTION PROFESSIONALS
Early Intervention Provider Agency
340 S LEMON AVE, #4458
WALNUT, CA 91789
Los Angeles County (909) 245-9979
SMITAL S SONI FNP
Nurse Practitioner (Family)
340 S LEMON AVE
WALNUT, CA 91789
Los Angeles County (415) 870-2437
SAMANTHA DONMEZ NP
Nurse Practitioner (Family)
340 S LEMON AVE
WALNUT, CA 91789
Los Angeles County (415) 403-2156
DANIELLE DENISE WILLIAMS
Technician (Attendant Care Provider)
340 S LEMON AVE
WALNUT, CA 91789
Los Angeles County (408) 837-0116

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Alexander Wielaard's NPI number?

The NPI number for Alexander Wielaard is 1144438995. It was assigned to this individual provider in the NPPES registry on May 17, 2007.

Where is Alexander Wielaard located?

Alexander Wielaard practices at 340 S Lemon Ave 9926, Walnut, CA 91789. The listed phone number is (706) 306-4668.

What is Alexander Wielaard's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Alexander Wielaard enrolled in Medicare?

Yes. Alexander Wielaard is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Alexander Wielaard was last updated on November 21, 2016. NPI Profile syncs with the weekly NPPES data releases published by CMS.