Alexander D. Wielaard, MD
Emergency Medicine Physician · Walnut, CA
Alexander D. Wielaard, MD is an emergency medicine physician with a practice address in Walnut, California, and NPI 1144438995, issued on May 17, 2007. Check the license on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Alexander D. Wielaard
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- D0071128 MD
M-2007 GU
Self-reported in NPPES; status is on the state search - Practice location
- 340 S Lemon Ave, Walnut, CA 91789
- Phone
- (706) 306-4668
- Enumerated
- May 17, 2007
- Record last updated
- Nov 21, 2016 (not updated in 10 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 340 S Lemon Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Silvia BooneNurse's Aide1033982178
- Samantha Donmez, NPFamily Nurse Practitioner1861076119
- Smital Soni, FNPFamily Nurse Practitioner1619555240
- Danielle WilliamsAttendant Care Provider1962256107
Verify Alexander D. Wielaard in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of CaliforniaCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 88.1 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Alexander D. Wielaard among 7,751 emergency medicine physician records in California
Alexander D. Wielaard, MD is one of 7,751 emergency medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 40% of them.
- NPI issued2007 · 40% of these records are older, 50% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2016 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in California
There are 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Walnut → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Gilbert Benitez, PAWest Covina, CA 917901184678245
- Lane Braver, PAWest Covina, CA 917901144268343
- Cheryl Cochrane, MDWest Covina, CA 917901922053834
- Edward Gentile, MDWest Covina, CA 917901851348288
- James Holland, MDWest Covina, CA 917901831146240
- William Kilpatrick, MDWest Covina, CA 917901528151016
- Denis Kollar, MDWest Covina, CA 917901154375830
- Edmund Nichter, M.D.West Covina, CA 917901184897910
Common questions
What is Alexander D. Wielaard, MD's NPI number?
Alexander D. Wielaard, MD's National Provider Identifier (NPI) is 1144438995, issued on May 17, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Alexander D. Wielaard, MD located?
The NPPES record lists a practice address at 340 S Lemon Ave, Walnut, CA, 91789. Phone: (706) 306-4668. Providers update this record themselves, so call before visiting.
How can I verify Alexander D. Wielaard, MD's license?
Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Alexander D. Wielaard, MD's MIPS final score?
The 2023 MIPS final score is 88.1 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.