Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Robert G Collum, MD
Internal Medicine Physician in Denville, NJ · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1912941899
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Registry record
Taxonomy & licenses
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 1K3274 | Other | - | HEALTH NET |
| 223297079 | Other | - | BCBS |
| 223297079 | Other | - | HORIZON HEALTHCARE ADM |
| 4977236007 | Other | - | CIGNA HEALTHCARE |
| 8393508 | Medicaid | NJ | - |
| 223297079 | Other | - | MEDICARE BLUE HMO BLUE |
| 4977236007 | Other | - | CIGNA |
| 110189724 | Other | NJ | RAILROAD MEDICARE |
| 223297079 | Other | - | BLUE SHIELD OF NJ |
| 223297079 | Other | - | HMO BLUE |
| 78020564426360 | Other | - | BLUE CHOICE NJ PLUS POS |
| 2136430 | Other | - | AETNA |
| 85682 | Other | - | EMPIRE BLUE CHOICE PPO |
| P908927 | Other | NJ | OXFORD |
| 2010098000 | Other | - | AMERIHEALTH |
| 223297079 | Other | - | BLUE CROSS OF CONNETICUT |
| 856821 | Other | - | WELLCHOICE |
| 2010098000 | Other | - | KEYSTONE HEALTH EAST |
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.
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Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-12-10.