Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Deborah Markiewicz, MD

Radiation Oncology Physician in Drexel Hill, PA · enumerated 2005.

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

National Provider Identifier

1780684845

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Registry record

Entity type Individual (Type 1)

Name Dr. Deborah Markiewicz

Credential MD

Sex Female

Practice address 501 N Lansdowne Ave, Drexel Hill, PA, 19026

Phone (610) 284-8240

Enumeration date Jul 29, 2005

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians · License MD040605E (PA) 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
0491927	Other	PA	AETNA USHC
0014104980007	Medicaid	PA	-
0638331000	Other	PA	KEYSTONE HEALTH PLAN EAST
1005825	Other	PA	KEYSTONE MERCY
1920058	Other	PA	CIGNA
734460	Other	PA	PA BCBS

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 Deborah Markiewicz?

Deborah Markiewicz is registered in NPPES with the primary taxonomy of Radiation Oncology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.