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Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

John R. Melnick, M. D. & Associates

Internal Medicine Physician in Gaithersburg, MD · enumerated 2006 · authorized official John Melnick, Owner/Manager.

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

National Provider Identifier

1427139351

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Registry record

Entity type Organization (Type 2)
Legal business name John R. Melnick, M. D. & Associates
Practice address 911 Russell Ave, Gaithersburg, MD, 20879
Phone (301) 258-0944
Fax (301) 258-8804
Enumeration date Oct 18, 2006
Last updated in NPPES Mar 3, 2008

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License D0019294 (MD) Primary

Authorized official

Name John Melnick
Title Owner/Manager
Phone (301) 258-0944

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

Who is the authorized official for John R. Melnick, M. D. & Associates?
NPPES lists John Melnick (Owner/Manager) as the authorized official for this organization.
What is the NPI number for John R. Melnick, M. D. & Associates?
The NPI for John R. Melnick, M. D. & Associates is 1427139351, a Type 2 (organization) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-03-03.