Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Michael Joseph Whalen, M.D.

Urology Physician in Washington, DC · enumerated 2008.

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

National Provider Identifier

1164675245

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Registry record

Entity type Individual (Type 1)

Name Dr. Michael Joseph Whalen

Credential M.D.

Sex Male

Practice address 2150 Pennsylvania Ave Nw, Dept of Urology, Gw Mfa Suite 3-417, Washington, DC, 20037

Phone (202) 741-3100

Enumeration date Nov 3, 2008

Last updated in NPPES Sep 2, 2021

Taxonomy & licenses

208800000X Urology Physician Allopathic & Osteopathic Physicians · License 54046 (CT) Secondary

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

208800000X Urology Physician Allopathic & Osteopathic Physicians · License 044326 (DC) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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 Michael Whalen?

Michael Whalen is registered in NPPES with the primary taxonomy of Urology 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 2021-09-02.