Jessica Wen Xiao, MD
Internal Medicine Physician · Antioch, CA
Jessica Wen Xiao, MD is an internal medicine physician with a practice address in Antioch, California, and NPI 1164008785, issued on Mar 23, 2021. Check the license (California 185362, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jessica Wen Xiao
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 185362 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4501 Sand Creek RD, Antioch, CA 94531
- Phone
- (925) 858-1579
- Enumerated
- Mar 23, 2021
- Record last updated
- Sep 16, 2024
- Medicare enrollment
- Enrolled (PECOS I20240918001850); accepts Medicare assignment
- Medical or professional school
- University Of California, San Diego School Of Medicine, 2021
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 4501 Sand Creek RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Jessica Wen Xiao in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 185362Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average internal medicine physician in 2024
71 Medicare Part D claims for 25 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Permanente Medical Group IncAntioch, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jessica Wen Xiao among 17,696 internal medicine physician records in California
Jessica Wen Xiao, MD is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 92% of them.
- NPI issued2021 · 92% of these records are older, 5% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2021 · median 2004 among the 11,065 with a school on file
- Record last updated2024 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
66 internal medicine physician records list a practice address in Antioch
They are 66 of the 2,184 NPPES records with a practice address in Antioch, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Antioch → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Zenen Alpuerto, MDAntioch, CA 945311548215478
- Jalal Atmar, MDAntioch, CA 945311265510846
- Kausalya Bhaskarabhatla, M.D.Antioch, CA 945311003867607
- Melissa Carucci, MDAntioch, CA 945311376621813
- Hsiao-Pin Chin, MDAntioch, CA 945311518045616
- Ioannis Eleftheriadis, MDAntioch, CA 945311679651731
- Louis Enrique, M.D.Antioch, CA 945311356363642
- Stephen Foster, MDAntioch, CA 945311851479927
Common questions
What is Jessica Wen Xiao, MD's NPI number?
Jessica Wen Xiao, MD's National Provider Identifier (NPI) is 1164008785, issued on Mar 23, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Jessica Wen Xiao, MD located?
The NPPES record lists a practice address at 4501 Sand Creek RD, Antioch, CA, 94531. Phone: (925) 858-1579. Providers update this record themselves, so call before visiting.
How can I verify Jessica Wen Xiao, MD's license?
NPPES lists California license number 185362, as entered by the provider. 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.
How much does Jessica Wen Xiao, MD prescribe under Medicare Part D?
In 2024, Jessica Wen Xiao, MD had 71 Medicare Part D claims for 25 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
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.