Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Bradley Paul Mackler, M.D.

Gastroenterology Physician in Seaford, DE · enumerated 2006 · practices at Nanticoke Gastroenterology, P.A..

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

National Provider Identifier

1356430854

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Bradley Paul Mackler

Credential M.D.

Sex Male

Practice address Seaford, DE, 19973

Phone (302) 629-2229

Fax (302) 629-2285

Enumeration date Oct 12, 2006

Last updated in NPPES Mar 14, 2012

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License C10004336 (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
100010338	Other	DE	MEDICARE RAILROAD
505182	Other	DE	AETNA
0000559901	Medicaid	DE	-
421862	Other	DE	OPT CHOICE/MDIPA
0196029 00	Other	DE	MARYLAND MEDICAID
421862	Other	DE	OPT CHOICE
1939	Other	DE	COVENTRY
2714	Other	DE	BLUE CROSS OF MARYLAND
522065442	Other	DE	CARELINK
PAL58270210001	Other	DE	CIGNA
522065442	Other	DE	BCBS OF DELAWARE

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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Bradley Mackler?

Bradley Mackler is registered in NPPES with the primary taxonomy of Gastroenterology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

Other providers at this practice address

Browse all →

Nanticoke Gastroenterology, P.A. Gastroenterology Physician · Seaford, DE NPI 1649311325

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-03-14.