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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.

MR. NESTOR J FLORES MD
NPI 1255830378
Internal Medicine in Stony Brook, NY

Active since February 04, 2018PECOS Enrolled
101 NICOLLS RD, STONY BROOK, NY 11794(631) 689-8333 Get Directions Write a Review

NPPES record last updated: June 30, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Sep 30, 2024, Sep 21, 2021, Sep 15, 2021 and 1 more (4 updates tracked since 2021).

About Mr. Nestor J Flores Md NPPES

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

MR. NESTOR J FLORES MD (NPI 1255830378) is an individual internal medicine provider in Stony Brook, New York, licensed in Massachusetts (1020023) and active in the NPI registry since February 2018. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1255830378
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameMR. NESTOR J FLORESCredential: MD
Location Address101 NICOLLS RDStony Brook, NY 11794-0001
Mailing Address101 Nicolls RdStony Brook, NY 11794-0001 · (631) 689-8333
Phone(631) 689-8333
Sole ProprietorNo
Enumeration DateFebruary 4, 2018
Last NPPES UpdateJune 30, 20264 updates tracked since enumeration
NPPES CertifiedJune 30, 2026
✔ NPI 1255830378 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in MA · 1020023
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.
Also ListedHospitalistTaxonomy 208M00000X · License 1020023 (MA)
101 NICOLLS RD, Stony Brook, NY 11794
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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)

Mr. Nestor J Flores Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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 11794 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.

NARINDER SINGH M.D.
Internal Medicine
101 NICOLLS RD
STONY BROOK, NY 11794
Suffolk County (631) 444-4000
DR. KANHAI FARRAKHAN MD
Internal Medicine (Gastroenterology)
101 NICOLLS RD
STONY BROOK, NY 11794
Suffolk County (631) 444-0580
MS. HAYLEY ALEXANDRA MENA LMSW
Social Worker (Clinical)
101 NICOLLS RD
STONY BROOK, NY 11794
Suffolk County (516) 761-4107
MRS. HEATHER MARIE CALIGIURI ANP
Nurse Practitioner (Adult Health)
101 NICOLLS RD
STONY BROOK, NY 11794
Suffolk County (631) 631-4449
MR. SAM TARIK MENDOUNE I NP
Nurse Practitioner (Adult Health)
101 NICOLLS RD
STONY BROOK, NY 11794
Suffolk County (631) 335-1657
ALEXIE LESSING
Student in an Organized Health Care Education/Training Program
101 NICOLLS RD
STONY BROOK, NY 11794
Suffolk County (631) 444-4686
DR. BENJAMIN RISMANY MD
Student in an Organized Health Care Education/Training Program
101 NICOLLS RD
STONY BROOK, NY 11794
Suffolk County (631) 444-1791
JULIA RYAN MD
Student in an Organized Health Care Education/Training Program
101 NICOLLS RD
STONY BROOK, NY 11794
Suffolk County (631) 689-8333

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 Nestor Flores's NPI number?

The NPI number for Nestor Flores is 1255830378. It was assigned to this individual provider in the NPPES registry on February 4, 2018.

Where is Nestor Flores located?

Nestor Flores practices at 101 Nicolls Rd, Stony Brook, NY 11794. The listed phone number is (631) 689-8333.

What is Nestor Flores's specialty?

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

Is Nestor Flores enrolled in Medicare?

Yes. Nestor Flores is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Nestor Flores was last updated on June 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 45 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.