Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Dolores L Un, MD
Pediatrics Physician in Newark, DE · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1588755961
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Registry record
Entity type Individual (Type 1)
Name Dr. Dolores L Un
Credential MD
Sex Female
Practice address Nemours Pediatrics Peoples Plaza, 1400 Peoples Plaza Ste. 300, Newark, DE, 19702
Phone (302) 836-7820
Fax (302) 836-7826
Enumeration date Sep 28, 2006
Last updated in NPPES Jul 8, 2007
Taxonomy & licenses
208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License C10002569 (DE) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 1594850 (PA) | Medicaid | DE | - |
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
Is NPI 1588755961 active?
Yes, as of the latest NPPES snapshot, NPI 1588755961 is active (record last updated 2007-07-08).
How do I verify Dolores Un's NPI record?
Cross-check NPI 1588755961 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.