James D. Simpson, MD
James D. Simpson is a Vascular Surgery Physician provider (Surgery) practicing in Riverside, CA, registered in the NPPES registry with NPI 1598813396 since 2007. The credential MD stands for Doctor of Medicine.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1598813396 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | James D. Simpson |
| Credential | MD |
| Sex | Male |
| Practice address | 10800 MAGNOLIA AVE, Riverside, CA, 92505 |
| Phone | 9093532000 |
| Enumeration date | 2007-01-08 |
| Last updated in NPPES | 2020-05-12 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 2086S0129X | Vascular Surgery Physician | Primary | G20839 | 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: James Simpson, MD NPI: 1598813396 Taxonomy: 2086S0129X (Vascular Surgery Physician) Address: 10800 MAGNOLIA AVE, Riverside, CA, 92505
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1497746598 | Sherif Ammar | Individual | Otolaryngology Physician | Riverside, CA |
| 1740262674 | Bahram Mirza | Individual | Endocrinology, Diabetes & Metabolism Physician | Riverside, CA |
| 1265416739 | Iwan Ong | Individual | Internal Medicine Physician | Riverside, CA |
| 1447200449 | Shawn Higuchi | Individual | Neurology Physician | Riverside, CA |
| 1013967892 | Diane Connelly | Individual | Obstetrics & Gynecology Physician | Riverside, CA |
| 1720039696 | John Dellaripa | Individual | Certified Registered Nurse Anesthetist | Riverside, CA |
| 1124070420 | Mimi Le | Individual | Cardiovascular Disease Physician | Riverside, CA |
| 1568417921 | Mark Massi | Individual | Pediatrics Physician | Riverside, CA |
Verify this record
Cross-check NPI 1598813396 against the authoritative CMS record: view James D. Simpson 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
What is the NPI number for James Simpson?
Where does James Simpson practice?
Source: CMS NPPES (public data). Snapshot 2026-07-10. Provider record last updated 2020-05-12.