Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Hal C. Byck, MD

General Practice Physician in Wilmington, DE · enumerated 2006.

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

National Provider Identifier

1659477131

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Registry record

Entity type Individual (Type 1)

Name Dr. Hal C. Byck

Credential MD

Sex Male

Practice address Nemours Pediatrics Jessup St., 1602 Jessup Street, Wilmington, DE, 19802

Phone (302) 576-5050

Fax (302) 576-5065

Enumeration date Sep 15, 2006

Last updated in NPPES Jan 6, 2012

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License C10003946 (DE) Secondary

208D00000X General Practice Physician Allopathic & Osteopathic Physicians · License C10003946 (DE) Primary

208M00000X Hospitalist Physician Allopathic & Osteopathic Physicians · License C10003946 (DE) Secondary

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
5607400	Medicaid	NJ	-
6704204	Medicaid	VA	-
001447101	Medicaid	PA	-
4423030	Medicaid	DC	-
1484311	Medicaid	MD	-

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 this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Hal Byck?

Hal Byck is registered in NPPES with the primary taxonomy of General Practice Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

Browse all →

Colleen Witherell General Practice Physician · Wilmington, DE NPI 1396836771 Laurie Cooke General Practice Physician · Wilmington, DE NPI 1972693612 Gina Amoroso General Practice Physician · Wilmington, DE NPI 1578693958

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-01-06.