DR. FRANCIS MARC GACEK DO
NPI 1437844214
Internal Medicine in Port Jefferson, NY

Q: What is Francis Gacek's NPI number?

The NPI number for Francis Gacek is 1437844214. It was assigned to this individual provider in the NPPES registry on April 7, 2023.

Q: What is Francis Gacek's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Francis Gacek was last updated on August 11, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months 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.

Active since April 07, 2023PECOS Enrolled

75 N COUNTRY RD, PORT JEFFERSON, NY 11777(631) 473-1320 Get Directions Write a Review

NPPES record last updated: August 11, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Aug 11, 2026, Apr 7, 2023 (2 updates tracked since 2023).

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About Dr. Francis Marc Gacek Do NPPES

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

DR. FRANCIS MARC GACEK DO (NPI 1437844214) is an individual internal medicine provider in Port Jefferson, New York, licensed in New York (344406) and active in the NPI registry since April 2023. He is enrolled in Medicare PECOS and is a graduate of Other (2023).

NPPES Registry Identity

NPI1437844214

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameDR. FRANCIS MARC GACEKCredential: DO

Location Address75 N COUNTRY RDPort Jefferson, NY 11777-2119

Mailing Address75 N Country RdPort Jefferson, NY 11777-2119

Phone(631) 473-1320

Sole ProprietorYes

Medical School CMSOtherGraduated 2023

Enumeration DateApril 7, 2023

Last NPPES UpdateAugust 11, 20262 updates tracked since enumeration

NPPES CertifiedAugust 11, 2026

✔ NPI 1437844214 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in NY · 344406

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.

75 N COUNTRY RD, Port Jefferson, NY 11777

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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Francis Marc Gacek Do is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID5991267866

PECOS Enrollment IDI20260921002904

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 11777 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$154.28 typical visit price

range $67.40 – $203.53

Typical copayment $38.57 (range $16.85 – $50.88)

Most-billed visit code 99204

Established Patient

$117.62 typical visit price

range $21.66 – $164.45

Typical copayment $29.40 (range $5.41 – $41.11)

Most-billed visit code 99214

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

JUSTINA CATHERINE MELLONE DO

Student in an Organized Health Care Education/Training Program