Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Douglas Gladstone, M.D.

Medical Oncology Physician in Baltimore, MD · enumerated 2006 · practices at Johns Hopkins Medical Institutions.

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

National Provider Identifier

1386660207

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Dr. Douglas Gladstone

Credential M.D.

Sex Male

Practice address 1650 Orleans St, Crb I , Suite 287 - Oncology, Baltimore, MD, 21287

Phone (443) 287-6471

Fax (410) 955-8893

Enumeration date Jul 14, 2006

Last updated in NPPES Apr 16, 2014

Taxonomy & licenses

207RX0202X Medical Oncology Physician Allopathic & Osteopathic Physicians · License 193432 (NY) Secondary

207RX0202X Medical Oncology Physician Allopathic & Osteopathic Physicians · License D50264 (MD) 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
01581671	Medicaid	NY	-
264401100	Medicaid	MD	-
0034K1	Other	NY	EMPIRE BC.BS
7844481	Other	NY	AETNA

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

Where does Douglas Gladstone practice?

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

What is the NPI number for Douglas Gladstone?

The National Provider Identifier (NPI) for Douglas Gladstone is 1386660207, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-04-16.