Dr. John S Link, MD
Dr. John S Link is a Hematology & Oncology Physician provider (Internal Medicine) practicing in Orange, CA, registered in the NPPES registry with NPI 1245281211 since 2006. The credential MD stands for Doctor of Medicine.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1245281211 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. John S Link |
| Credential | MD |
| Sex | Male |
| Practice address | 230 S. MAIN ST, SUITE 100, Orange, CA, 92868 |
| Phone | 7145410101 |
| Fax | 7145410450 |
| Enumeration date | 2006-05-15 |
| Last updated in NPPES | 2021-05-26 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 174400000X | Specialist | Secondary | G25774 | CA |
| 207RX0202X | Medical Oncology Physician | Secondary | G25774 | CA |
| 207RH0003X | Hematology & Oncology Physician | Primary | G25774 | CA |
MD — Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential
Copy-ready billing details
Provider: John Link, MD NPI: 1245281211 Taxonomy: 207RH0003X (Hematology & Oncology Physician) Address: 230 S. MAIN ST, SUITE 100, Orange, CA, 92868
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1932196847 | Cordelia Knott Wellness Foundation | Organization | Prosthetic/Orthotic Supplier | Orange, CA |
| 1235199274 | John West | Individual | Specialist | Orange, CA |
| 1396786323 | Jessica Hung | Individual | Gastroenterology Physician | Orange, CA |
| 1154362010 | Jose Roque | Individual | Gastroenterology Physician | Orange, CA |
| 1043241052 | Link Institute for Women'S Health | Organization | Medical Oncology Physician | Orange, CA |
| 1922033620 | Raymond Kuo | Individual | Diagnostic Radiology Physician | Orange, CA |
| 1437269354 | The Breast Care Center of Orange County, Inc. | Organization | Specialist | Orange, CA |
| 1730272097 | Jose M. Roque, M.D., Inc. | Organization | Gastroenterology Physician | Orange, CA |
Verify this record
Cross-check NPI 1245281211 against the authoritative CMS record: view Dr. John S Link 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
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2021-05-26.