Dr. Robert John Macarthur, MD
Dr. Robert John Macarthur is a Orthopaedic Surgery Physician provider (Orthopaedic Surgery) practicing in Orange, CA, registered in the NPPES registry with NPI 1508949470 since 2006. The credential MD stands for Doctor of Medicine.
✓ Active NPI ✓ Valid NPI checksum Sole proprietor
| NPI | 1508949470 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. Robert John Macarthur |
| Credential | MD |
| Sex | Male |
| Practice address | Orange, CA, 92868 |
| Phone | 7145500070 |
| Fax | 7145500035 |
| Enumeration date | 2006-10-23 |
| Last updated in NPPES | 2023-10-17 |
Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 207X00000X | Orthopaedic Surgery Physician | Primary | G76912 | 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: Robert Macarthur, MD NPI: 1508949470 Taxonomy: 207X00000X (Orthopaedic Surgery Physician) Address: Orange, CA, 92868
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1659371581 | Troy Reyna | Individual | Pediatric Surgery Physician | Orange, CA |
| 1235124108 | Alaa Abousaif | Individual | Gastroenterology Physician | Orange, CA |
| 1629040308 | William Metzger | Individual | Gastroenterology Physician | Orange, CA |
| 1346216009 | James Chu | Individual | Pediatric Cardiology Physician | Orange, CA |
| 1750358735 | James Lee | Individual | Gastroenterology Physician | Orange, CA |
| 1861460370 | James Law | Individual | Pulmonary Disease Physician | Orange, CA |
| 1386613941 | Dixie Stiles | Individual | Nurse Practitioner | Orange, CA |
| 1659340156 | Nadia Elihu | Individual | Internal Medicine Physician | Orange, CA |
Verify this record
Cross-check NPI 1508949470 against the authoritative CMS record: view Dr. Robert John Macarthur 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 2023-10-17.