Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Greater Washington Oncology Associates

Hematology & Oncology Physician in Silver Spring, MD · enumerated 2006 · authorized official Ram Trehan, Managing Partner.

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

National Provider Identifier

1740396761

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Registry record

Entity type Organization (Type 2)

Legal business name Greater Washington Oncology Associates

Practice address 10750 Columbia Pike Ste 501, Silver Spring, MD, 20901

Phone (301) 593-9035

Enumeration date Aug 22, 2006

Last updated in NPPES Jul 21, 2022

Taxonomy & classification

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Ram Trehan

Title Managing Partner

Phone (301) 593-9035

Other identifiers

Identifier	Type	State	Issuer
070203700	Medicaid	DC	-
CK8440	Other	DC	RAILROAD MEDICARE
403272100	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

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2022-07-21. Verify at npiregistry.cms.hhs.gov.

Where is Greater Washington Oncology Associates located?

The practice location on file with NPPES is in Silver Spring, MD.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-07-21.