Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Timothy J Greenan, M.D.

Diagnostic Radiology Physician in Rockville, MD · enumerated 2006.

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

National Provider Identifier

1073562088

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Registry record

Entity type Individual (Type 1)

Name Dr. Timothy J Greenan

Credential M.D.

Sex Male

Practice address 14915 Broschart Road, Suite 102, Rockville, MD, 20850

Phone (301) 251-7897

Fax (301) 251-7898

Enumeration date May 8, 2006

Last updated in NPPES Oct 15, 2021

Taxonomy & licenses

174400000X Specialist Other Service Providers · License MD044122E (PA) Secondary

174400000X Specialist Other Service Providers · License D0041613 (MD) Secondary

174400000X Specialist Other Service Providers · License 205142 (NY) Secondary

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License D0041613 (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
307841800	Medicaid	MD	-
300086644	Other	NY	MEDICARE RAILROAD
01853516	Medicaid	NY	-
300119922	Other	NY	MEDICARE RAILROAD
0015522500006	Medicaid	PA	-

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

How do I verify Timothy Greenan's NPI record?

Cross-check NPI 1073562088 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1073562088 active?

Yes, as of the latest NPPES snapshot, NPI 1073562088 is active (record last updated 2021-10-15).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-10-15.