Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Barbara Neilan, M.D.

Hematology & Oncology Physician in Newark, DE · enumerated 2006.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1588614697

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Registry record

Entity type Individual (Type 1)

Name Barbara Neilan

Credential M.D.

Sex Female

Practice address 4701 Ogletown Stanton Rd, Suite 2400, Newark, DE, 19713

Phone (302) 731-7782

Fax (302) 738-5917

Enumeration date May 11, 2006

Last updated in NPPES Jun 9, 2009

Taxonomy & licenses

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians · License C10005770 (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
000677161	Medicaid	PA	-
092600200	Medicaid	MD	-
0000988301	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.

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Frequently asked questions

Is NPI 1588614697 active?

Yes, as of the latest NPPES snapshot, NPI 1588614697 is active (record last updated 2009-06-09).

How do I verify Barbara Neilan's NPI record?

Cross-check NPI 1588614697 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

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Robert Slease Hematology (Internal Medicine) Physician · Newark, DE NPI 1649275124 Greg Pahnke Surgical Oncology Physician · Newark, DE NPI 1427054857 Scott Hall Hematology (Internal Medicine) Physician · Newark, DE NPI 1013913292 Steven Falchuk Hematology & Oncology Physician · Newark, DE NPI 1134128283 Brenda Mckenzie Family Nurse Practitioner · Newark, DE NPI 1235123837 Raafat Abdel-Misih Surgery Physician · Newark, DE NPI 1821088048 Joseph Bennett Surgery Physician · Newark, DE NPI 1619967841 Christiana Care Health Services, Inc Thoracic Surgery (Cardiothoracic Vascular Surgery) Physician · Newark, DE NPI 1154306512

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-06-09.