Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Michael Radkowsky, PSY.D.

Clinical Psychologist in Washington, DC · enumerated 2007 · practices at Stuart M. Sotsky MD Pllc.

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

National Provider Identifier

1821219643

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Registry record

Entity type Individual (Type 1)

Name Dr. Michael Radkowsky

Credential PSY.D.

Sex Male

Practice address Washington, DC, 20008

Phone (202) 234-3278

Enumeration date May 1, 2007

Last updated in NPPES May 2, 2017

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 1000053 (DC) Primary

PSYD · Doctor of Psychology: A clinical doctorate in psychology focused on professional practice. About the PSYD credential

Other identifiers

Identifier	Type	State	Issuer
52-2109946	Other	DC	TAX ID
1000053	Other	DC	PSYCHOLOGY LICENSE

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

Is NPI 1821219643 active?

Yes, as of the latest NPPES snapshot, NPI 1821219643 is active (record last updated 2017-05-02).

How do I verify Michael Radkowsky's NPI record?

Cross-check NPI 1821219643 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

Browse all →

Jane Pettit Clinical Social Worker · Washington, DC NPI 1295883809 Jennifer Sherman Clinical Social Worker · Washington, DC NPI 1730301862 Leigh Simpson Clinical Social Worker · Washington, DC NPI 1730391210 Stuart M. Sotsky MD Pllc Psychiatry Physician · Washington, DC NPI 1811162738

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-05-02.