Willem Xu, MD
Anesthesiology Physician · Santa Ana, CA
Willem Xu, MD is an anesthesiology physician with a practice address in Santa Ana, California, and NPI 1013570480, issued on Apr 20, 2019. Check the license on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Willem Xu
- Credential
- MD
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- Practice location
- 400 N Tustin Ave, Santa Ana, CA 92705
- Phone
- (714) 619-5391
- Enumerated
- Apr 20, 2019
- Entity
- Type 1 · individual
Also registered at 400 N Tustin Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jennifer Engstrom, MDAnesthesiology Physician1619050119
- Jennifer FerrufinoCounselor1326698614
- Pamela Jacobson, LACAcupuncturist1649480070
- Jason Kim, DOStudent in an Organized Health Care Education/Training Program1366938953
- Dustin Morris, MDAnesthesiology Physician1194822338
- Lawrence Ong, M.D., M.ENG.Student in an Organized Health Care Education/Training Program1316254840
Verify Willem Xu 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
One hospital or facility affiliation
- Allied Anesthesia Medical Group IncModesto, CA
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Anesthesiology Physician providers in California
There are 7,276 anesthesiology physician records in California.
Other anesthesiology physician records in California
- Alison A'Court, MDSan Diego, CA1912218199
- Peter Abaci, MDLos Gatos, CA1447200761
- Elma Abad-Pelsang, MDDel Mar, CA1689611923
- Rolando Abada, M.D.San Diego, CA1952319071
- Maher Abadir, MDTurlock, CA1669491718
- Jerry Abajian, M.D.Napa, CA1851336218
- Carolyn AbbasiLoma Linda, CA1811287311
- Christine Abboud, D.O.Walnut Creek, CA1174901508
- Steven Abboud, MDPalo Alto, CA1619364908
- Therese Abboud, M.D.Coronado, CA1003112913
Common questions
What is Willem Xu, MD's NPI number?
Willem Xu, MD's National Provider Identifier (NPI) is 1013570480, issued on Apr 20, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Willem Xu, MD located?
The NPPES record lists a practice address at 400 N Tustin Ave, Santa Ana, CA, 92705. Phone: (714) 619-5391. Providers update this record themselves, so call before visiting.
How can I verify Willem Xu, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.