Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Dennis Aloysius Cullen, MD

Internal Medicine Physician in Oxon Hill, MD · enumerated 2006.

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

National Provider Identifier

1104988054

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Registry record

Entity type Individual (Type 1)

Name Dr. Dennis Aloysius Cullen

Credential MD

Sex Male

Practice address 6188 Oxon Hill Road, Suite 704, Oxon Hill, MD, 20745

Phone (301) 839-2790

Fax (301) 839-3042

Enumeration date Dec 15, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License D0040216 (MD) Primary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License MD14432 (DC) 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
4293613	Other	-	AETNA
0001	Other	-	BCBS NATL CAPITOL AREA
41238404	Other	-	BCBS OF MARYLAND
1462915	Other	-	UNITED HEALTH CARE

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

What is the NPI number for Dennis Cullen?

The National Provider Identifier (NPI) for Dennis Cullen is 1104988054, a Type 1 (individual) record in the CMS NPPES registry.

Where does Dennis Cullen practice?

The practice location on file with NPPES is in Oxon Hill, MD. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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