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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. SEFIK ABDULHAYOGLU MD
NPI 1659358166
Internal Medicine in Chelsea, MA

Active since December 27, 2005
383 WASHINGTON AVE, CHELSEA, MA 02150(618) 884-3385(508) 993-8715 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Dr. Sefik Abdulhayoglu Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. SEFIK ABDULHAYOGLU MD (NPI 1659358166) is an individual internal medicine provider in Chelsea, Massachusetts, licensed in Massachusetts (34674) and active in the NPI registry since December 2005.

NPPES Registry Identity

NPI1659358166
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. SEFIK ABDULHAYOGLUCredential: MD
Location Address383 WASHINGTON AVEChelsea, MA 02150-3601
Mailing Address11 Longbow CirLynnfield, MA 01940-1430 · (508) 984-1940 · Fax (508) 993-8715
Phone(618) 884-3385
Fax(508) 993-8715
Sole ProprietorNo
Enumeration DateDecember 27, 2005
Last NPPES UpdateJuly 13, 2026
✔ NPI 1659358166 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in MA · 34674
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
383 WASHINGTON AVE, Chelsea, MA 02150
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Other Identifiers 1

Medicaid2002892MA

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Sefik Abdulhayoglu's NPI number?

The NPI number for Sefik Abdulhayoglu is 1659358166. It was assigned to this individual provider in the NPPES registry on December 27, 2005.

Where is Sefik Abdulhayoglu located?

Sefik Abdulhayoglu practices at 383 Washington Ave, Chelsea, MA 02150. The listed phone number is (618) 884-3385.

What is Sefik Abdulhayoglu's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

When was this NPI record last updated?

The NPPES record for Sefik Abdulhayoglu was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 36 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.