Dennis R. Long, M.D. Inc.
Dennis R. Long, M.D. Inc. is a healthcare organization registered as Legal Medicine in Orange, CA, holding Type 2 (organization) NPI 1407954852 since 2006. The authorized official on file is Sandi Williamson, Office Manager.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1407954852 |
|---|---|
| Entity type | Organization (Type 2) |
| Legal business name | Dennis R. Long, M.D. Inc. |
| Practice address | 2601 E CHAPMAN AVE, Orange, CA, 92869 |
| Phone | 9515325005 |
| Enumeration date | 2006-09-20 |
| Last updated in NPPES | 2009-04-16 |
Authorized official
| Name | Sandi Williamson |
|---|---|
| Title | Office Manager |
| Phone | 9515325005 |
Taxonomy & classification
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 173000000X | Legal Medicine | Primary | 00G472430 | CA |
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 00G472430 | Other | CA | BLUE CROSS/SHIELD |
| HG47243 | Other | CA | TRICARE |
| 00G472430 | Medicaid | CA | — |
Copy-ready billing details
Provider: Dennis R. Long, M.D. Inc. NPI: 1407954852 Taxonomy: 173000000X (Legal Medicine) Address: 2601 E CHAPMAN AVE, Orange, CA, 92869
Providers at this address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1427041110 | Chapman Global Medical Center, Inc | Organization | General Acute Care Hospital | Orange, CA |
| 1154319754 | Christos Kalatzis | Individual | Anesthesiology Physician | Orange, CA |
| 1700867298 | James Chang | Individual | Anesthesiology Physician | Orange, CA |
| 1881654770 | Placentia Pathology Medical Group | Organization | Anatomic Pathology & Clinical Pathology Physician | Orange, CA |
| 1396798690 | Acute Care Medical Group of Orange Inc | Organization | Emergency Medicine Physician | Orange, CA |
| 1336189794 | Anita Wang | Individual | Emergency Medicine Physician | Orange, CA |
| 1922049394 | Vadim Chudnovsky | Individual | Diagnostic Radiology Physician | Orange, CA |
| 1487695441 | Lorraine Metzler-Szabo | Individual | Family Medicine Physician | Orange, CA |
Verify this record
Cross-check NPI 1407954852 against the authoritative CMS record: view Dennis R. Long, M.D. 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
What is the NPI number for Dennis R. Long, M.D. Inc.?
Who is the authorized official for Dennis R. Long, M.D. Inc.?
Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2009-04-16.