Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Sidney S Markowitz DDS PC

Q: What is the NPI number for Sidney S Markowitz DDS PC?

The NPI for Sidney S Markowitz DDS PC is 1487615159, a Type 2 (organization) record in the CMS NPPES registry.

Dentist in Washington, DC · enumerated 2006 · authorized official Sidney Markowtiz, President.

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

National Provider Identifier

1487615159

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Registry record

Entity type Organization (Type 2)

Legal business name Sidney S Markowitz DDS PC

Practice address 1145 19th Street Nw, Suite 316, Washington, DC, 20036

Phone (202) 833-8240

Fax (202) 331-7803

Enumeration date Mar 31, 2006

Last updated in NPPES Aug 22, 2020

Taxonomy & classification

122300000X Dentist Dental Providers Primary

Authorized official

Name Sidney Markowtiz

Title President

Phone (202) 833-8240

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

Who is the authorized official for Sidney S Markowitz DDS PC?

NPPES lists Sidney Markowtiz (President) as the authorized official for this organization.

What is the NPI number for Sidney S Markowitz DDS PC?

The NPI for Sidney S Markowitz DDS PC is 1487615159, 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 2020-08-22.