Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Ling Xu, MD

Individual provider Internal Medicine Physician · NPI 1073684429

Ling Xu, MD practises Internal Medicine in Castro Valley, California. Qualified in 1983, 43 years ago. Practices with University Healthcare Alliance, a 332-clinician group, works from 3 locations, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
43
Licensed in
CA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

20642 John Dr
Castro Valley, CA 94546-5103
Phone: (510) 785-5000
Fax: (510) 785-5295
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 20130 Lake Chabot Rd, Castro Valley, CA 94546-5340 — (510) 690-9360
  • 9615 Crosby Dr, Pleasanton, CA 94588-4613 — (510) 690-9360

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence A69273 (CA)

Record details

NPI number1073684429
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 9, 2006
Last updated in NPPESApril 24, 2024
Certification dateApril 24, 2024

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 1983 (43 years in practice)
Group practice University Healthcare Alliance — 332 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients382
Services billed 1,542 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at University Healthcare Alliance

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 332 clinicians in the practice; 12 are shown here.

Other providers in Castro Valley