Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Tzvetan Tzvetanov, Internal Medicine, LLC

Internal Medicine Physician in North Andover, MA · enumerated 2005 · authorized official Lisa Albetski, Assistant.

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

National Provider Identifier

1447237854

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Registry record

Entity type Organization (Type 2)

Legal business name Tzvetan Tzvetanov, Internal Medicine, LLC

Practice address 565 Turnpike Street, Suite #5, North Andover, MA, 01845

Phone (978) 722-1967

Fax (978) 683-6918

Enumeration date Dec 28, 2005

Last updated in NPPES May 11, 2011

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Lisa Albetski

Title Assistant

Phone (978) 688-1042

Other identifiers

Identifier	Type	State	Issuer
9731695	Medicaid	MA	-

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 Tzvetan Tzvetanov, Internal Medicine, LLC located?

The practice location on file with NPPES is in North Andover, MA.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2011-05-11. Verify at npiregistry.cms.hhs.gov.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-05-11.