Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Drs Lewis, Unger & Barth, PC

Orthopaedic Surgery Physician in Washington, DC · enumerated 2006 · authorized official Randall Lewis, President.

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

National Provider Identifier

1629176029

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Registry record

Entity type Organization (Type 2)

Legal business name Drs Lewis, Unger & Barth, PC

Practice address 2021 K Street, N.W., Suite 400, Washington, DC, 20006

Phone (202) 466-5151

Fax (202) 466-4072

Enumeration date Sep 20, 2006

Last updated in NPPES Aug 22, 2020

Taxonomy & classification

207X00000X Orthopaedic Surgery Physician Allopathic & Osteopathic Physicians · License 9098 (DC) Primary

Authorized official

Name Randall Lewis

Title President

Phone (202) 466-5151

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 current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2020-08-22. Verify at npiregistry.cms.hhs.gov.

Where is Drs Lewis, Unger & Barth, PC located?

The practice location on file with NPPES is in Washington, DC.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-22.