Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Robert M Ellsworth, MD
Diagnostic Radiology Physician in Worcester, MA · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1972578979
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Registry record
Taxonomy & licenses
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 1150042 | Other | - | FIRST HEALTH |
| 5635531 | Other | - | AETNA |
| 784213 | Other | - | MVP HEALTH CARE |
| C05097 | Other | - | BLUE SHIELD INDEMNITY |
| 26802 | Other | - | HEALTHY START |
| C05097 | Other | - | BLUE SHIELD HMO BLUE |
| 042472266 | Other | - | ONE HEALTH PLAN |
| 9900863 | Other | - | FALLON COMMUNITY HEALTH P |
| AA4010 | Other | - | HARVARD PILGRIM HEALTH CA |
| 042472266 | Other | - | HEALTHCARE VALUE MANAGEME |
| 2034107 | Medicaid | MA | - |
| 26802 | Other | - | CHILDRENS MEDICAL SECURIT |
| 300090862 | Other | - | RAILROAD MEDICARE |
| 4476761 | Other | - | CIGNA HEALTH PLAN |
| C05097 | Other | - | BLUE CARE ELECT |
| C05097 | Other | - | MEDICARE B |
| 042472266 | Other | - | PRIVATE HEALTHCARE SYSTEM |
| 2034107 | Other | - | MEDICAID WELFARE |
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.
Frequently asked questions
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Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-02-03.