Ling Xu, MD,Inc.
Ling Xu, MD,Inc. is a healthcare organization registered as Internal Medicine Physician in Castro Valley, CA, holding Type 2 (organization) NPI 1033280896 since 2006. The authorized official on file is Ling Xu, President.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1033280896 |
|---|---|
| Entity type | Organization (Type 2) |
| Legal business name | Ling Xu, MD,Inc. |
| Practice address | 20130 LAKE CHABOT RD., SUITE #307, Castro Valley, CA, 94546 |
| Phone | 5106909360 |
| Fax | 5106900346 |
| Enumeration date | 2006-11-13 |
| Last updated in NPPES | 2020-08-22 |
Authorized official
| Name | Ling Xu |
|---|---|
| Title | President |
| Phone | 5106909360 |
Taxonomy & classification
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 207R00000X | Internal Medicine Physician | Primary | A69273 | CA |
Copy-ready billing details
Provider: Ling Xu, MD,Inc. NPI: 1033280896 Taxonomy: 207R00000X (Internal Medicine Physician) Address: 20130 LAKE CHABOT RD., SUITE #307, Castro Valley, CA, 94546
Providers at this address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1649275330 | Louise Hom | Individual | Surgery Physician | Castro Valley, CA |
| 1376569475 | Marcia Peck | Individual | Endocrinology, Diabetes & Metabolism Physician | Castro Valley, CA |
| 1316959299 | Benjamin Wolsztejn, MD Inc | Organization | Obstetrics & Gynecology Physician | Castro Valley, CA |
| 1790858611 | Donald Knotts | Individual | Internal Medicine Physician | Castro Valley, CA |
| 1871648188 | Associatedurology Medical Group,Inc. | Organization | Urology Physician | Castro Valley, CA |
| 1851439145 | Patti Hee | Individual | Physician Assistant | Castro Valley, CA |
| 1750589560 | Donald R. Knotts, M.D. Inc | Organization | Medical Specialty Clinic/Center | Castro Valley, CA |
| 1346529617 | Kenneth L. Rothman, M.D., Inc. | Organization | Primary Care Clinic/Center | Castro Valley, CA |
Verify this record
Cross-check NPI 1033280896 against the authoritative CMS record: view Ling Xu, MD,Inc. on the official NPPES registry .
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.
Frequently asked questions
Where is Ling Xu, MD,Inc. located?
How current is this record?
Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2020-08-22.