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GUILLAUME BASSIL M.D.
NPI 1235524372
Internal Medicine - Cardiovascular Disease in New York, NY

Active since April 06, 2015PECOS EnrolledAccepts Medicare Assignment
76.52/100
CMS Quality Rating
18 W 18TH ST, NEW YORK, NY 10011(917) 512-8500 Get Directions Write a Review

NPPES record last updated: February 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Guillaume Bassil M.d. NPPES

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

GUILLAUME BASSIL M.D. (NPI 1235524372) is an individual cardiovascular disease provider in New York, New York, licensed in Connecticut (67298) and active in the NPI registry since April 2015. He is enrolled in Medicare PECOS, maintains a secondary practice location in Hamden, and is a graduate of Other (2013).

NPPES Registry Identity

NPI1235524372
Entity TypeIndividualMale
Primary Taxonomy207RC0000X
Provider Legal NameGUILLAUME BASSILCredential: M.D.
Location Address18 W 18TH STNew York, NY 10011-4607
Mailing Address505 E 70th St, Weill Cornell Internal Medicine AsNew York, NY 10021-4872
Phone(917) 512-8500
Sole ProprietorNo
Medical School CMSOtherGraduated 2013
Enumeration DateApril 6, 2015
Last NPPES UpdateFebruary 13, 2026
NPPES CertifiedFebruary 13, 2026
✔ NPI 1235524372 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RC0000X
Licenses✔ Licensed in CT · 67298✔ Licensed in NY · 293038
Definition
An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.
Also ListedInternal Medicine · Interventional CardiologyTaxonomy 207RI0011X · License 67298 (CT)
18 W 18TH ST, New York, NY 10011
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Secondary Practice Location 1

Location 12200 Whitney Ave Ste 180Hamden, CT 06518-3602 · Phone (203) 407-2500

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Guillaume Bassil M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3072913581
PECOS Enrollment IDI20220913002024
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.

Areas of Expertise CMS Part B claims 7

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
131 services71 patients
Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 93306
This is a heart ultrasound, also known as an echocardiogram. It uses sound waves to create pictures of your heart, showing how blood flows through it. The color depicts the blood flow's speed and direction. It also checks the heart's valves to ensure they're working properly.
58 services57 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
57 services57 patients
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000
An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.
35 services35 patients
Ultrasound of both sides of head and neck blood flow 93880
An ultrasound of the head and neck blood flow is a safe, non-invasive procedure that uses sound waves to create images of blood vessels. It helps detect abnormalities like blockages or clots, ensuring optimal blood flow.
32 services32 patients
Ultrasound of heart with continuous electrocardiogram (ecg) during rest, exercise and/or drug induced stress with review and report 93351
This procedure involves using ultrasound technology to create images of your heart while you rest, exercise, or undergo drug-induced stress. An ECG continuously monitors your heart's electrical activity. It helps doctors assess heart health and function.
21 services21 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 10011 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
$150.24 typical visit price
range $65.69 – $198.19
Typical copayment $37.56 (range $16.42 – $49.54)
Most-billed visit code 99204
Established Patient
$81.44 typical visit price
range $21.20 – $160.66
Typical copayment $20.36 (range $5.30 – $40.16)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

76.52/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality64.02
Promoting Interoperability100
Improvement Activities40
Cost57.73

Other Providers at the Same Location NPPES 4

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

TORU TAKADA
Counselor (Mental Health)
18 W 18TH ST
NEW YORK, NY 10011
New York County (917) 519-7654
DR. AHMED ABUBAKAR MD
Internal Medicine
18 W 18TH ST
NEW YORK, NY 10011
New York County (646) 248-6700
ALESSANDRA HASKIN MD
Dermatology
18 W 18TH ST
NEW YORK, NY 10011
New York County (646) 616-0200
CITY MEDICAL OF UPPER EAST SIDE, PLLC
Clinic/Center (Urgent Care)
18 W 18TH ST
NEW YORK, NY 10011
New York County (646) 248-6700

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 Guillaume Bassil's NPI number?

The NPI number for Guillaume Bassil is 1235524372. It was assigned to this individual provider in the NPPES registry on April 6, 2015.

Where is Guillaume Bassil located?

Guillaume Bassil practices at 18 W 18th St, New York, NY 10011. The listed phone number is (917) 512-8500.

What is Guillaume Bassil's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Is Guillaume Bassil enrolled in Medicare?

Yes. Guillaume Bassil is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Guillaume Bassil was last updated on February 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.