Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Mark Sivieri M.D. P.A.

Family Medicine Physician in Columbia, MD · enumerated 2005 · authorized official Lynn Dudley, Office Manager.

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

National Provider Identifier

1255337002

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Registry record

Entity type Organization (Type 2)

Legal business name Mark Sivieri M.D. P.A.

Practice address 10005 Old Columbia Rd, Suite P170, Columbia, MD, 21046

Phone (410) 312-5280

Enumeration date Jun 27, 2005

Last updated in NPPES Oct 18, 2013

Taxonomy & classification

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License D0061704 (MD) Primary

Authorized official

Name Lynn Dudley

Title Office Manager

Phone (410) 312-5280

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 Mark Sivieri M.D. P.A. located?

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

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2013-10-18. Verify at npiregistry.cms.hhs.gov.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-10-18.