Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Anne C. Mazonson, MD,LLC

Psychiatry Physician in Bethesda, MD · enumerated 2008 · authorized official Anne Mazonson, Owner.

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

National Provider Identifier

1427229434

Verified

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Registry record

Entity type Organization (Type 2)

Legal business name Anne C. Mazonson, MD,LLC

Practice address 4807 Saint Elmo Ave, Suite 200, Bethesda, MD, 20814

Phone (301) 657-5655

Fax (301) 657-2814

Enumeration date Mar 18, 2008

Last updated in NPPES Mar 18, 2008

Taxonomy & classification

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License D41821 (MD) Primary

Authorized official

Name Anne Mazonson

Title Owner

Phone (301) 657-5655

Other identifiers

Identifier	Type	State	Issuer
G01869	Other	MD	GROUP NUMBER

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

Where is Anne C. Mazonson, MD,LLC located?

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

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2008-03-18. Verify at npiregistry.cms.hhs.gov.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-03-18.