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DR. GILLIAN V KUPAKUWANA-SUK M.D., PHD
NPI 1851748438
Internal Medicine - Hematology & Oncology in New Haven, CT

Active since May 24, 2016PECOS EnrolledAccepts Medicare Assignment
91.27/100
CMS Quality Rating
15 YORK ST, YNHH DEPT OF MEDICINE, LMP 1092, NEW HAVEN, CT 06510(203) 688-5555 Get Directions Write a Review

NPPES record last updated: September 17, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Sep 17, 2025, Sep 17, 2019 (2 updates tracked since 2019).

About Dr. Gillian V Kupakuwana-suk M.d., Phd NPPES

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

DR. GILLIAN V KUPAKUWANA-SUK M.D., PHD (NPI 1851748438) is an individual hematology & oncology provider in New Haven, Connecticut, licensed in New York (298769) and active in the NPI registry since May 2016. She is enrolled in Medicare PECOS, is affiliated with University Hospital S U N Y Health Science Center, and is a graduate of Columbia University College Of Physicians And Surgeons (2016).

NPPES Registry Identity

NPI1851748438
Entity TypeIndividualFemale
Primary Taxonomy207RH0003X
Provider Legal NameDR. GILLIAN V KUPAKUWANA-SUKCredential: M.D., PHD
Location Address15 YORK ST, YNHH DEPT OF MEDICINE, LMP 1092New Haven, CT 06510-3221
Mailing AddressDept. Of Medicine Medical Service Group, 750 E. Adams St.Syracuse, NY 13210 · (315) 464-8200 · Fax (315) 464-8206
Phone(203) 688-5555
Sole ProprietorYes
Medical School CMSColumbia University College Of Physicians And SurgeonsGraduated 2016
Enumeration DateMay 24, 2016
Last NPPES UpdateSeptember 17, 20252 updates tracked since enumeration
NPPES CertifiedSeptember 17, 2025
✔ NPI 1851748438 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
License✔ Licensed in NY · 298769
Definition
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
Also ListedInternal MedicineTaxonomy 207R00000X · License 298769 (NY)
15 YORK ST, New Haven, CT 06510
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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 and accepts Medicare assignment

Dr. Gillian V Kupakuwana-suk M.d., Phd 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 ID3072807676
PECOS Enrollment IDI20191002000649
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 2

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.

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
26 services26 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
21 services21 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

University Hospital S U N Y Health Science Center

Acute Care Hospitals · Syracuse, NY
3/5 CMS rating
OwnershipGovernment - State
CMS Certification Number330241
Location750 East Adams StreetSyracuse, NY 13210 · Onondaga County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 06510 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
$183.10 typical visit price
range $60.82 – $183.10
Typical copayment $45.77 (range $15.20 – $45.77)
Most-billed visit code 99205
Established Patient
$106.68 typical visit price
range $19.76 – $149.26
Typical copayment $26.67 (range $4.94 – $37.31)
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.

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.

91.27/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality73.6
Improvement Activities40
Cost85.96

Referred Medical Equipment & Supplies CMS DME claims 2

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Portable gaseous oxygen system, rental; includes portable container, regulator, flowmeter, humidifier, cannula or mask, and tubing E0431
DME-Oxygen and Supplies · category DC000N
1 supplier18 claims18 services$15.26 avg. paid by Medicare
Oxygen concentrator, single delivery port, capable of delivering 85 percent or greater oxygen concentration at the prescribed flow rate E1390
DME-Oxygen and Supplies · category DC002N
1 supplier30 claims30 services$83.55 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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.

KARAM AL JUMAILY
Student in an Organized Health Care Education/Training Program
15 YORK ST
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 785-4668
AARON VASSALL M.D.
Student in an Organized Health Care Education/Training Program
15 YORK ST, YNHH DEPT OF MEDICINE, LMP 1092
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-5555
MS. PEGGY SUEJIN MYUNG M.D., PH.D.
Dermatology (Dermatopathology)
15 YORK ST, LMP 5031
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (215) 668-7559
ROBERT E TIGELAAR MD
Dermatology
15 YORK ST, DERMATOLOGY, LCI ROOM 609
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 785-4632
REBECCA SLOTKIN M.D.
Internal Medicine
15 YORK ST, YNHH DEPT OF MEDICINE, LMP 1092
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 688-5555
MICHAEL GIRARDI MD
Dermatology
15 YORK ST
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 785-4632
GERALD H FRIEDLAND MD
Internal Medicine (Infectious Disease)
15 YORK ST, NATHAN SMITH BUILDING
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 785-5303
KACIE R CARLSON PA-C
Physician Assistant
15 YORK ST
NEW HAVEN, CT 06510
South Central Connecticut Planning Region (203) 785-4632

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 Gillian Kupakuwana-suk's NPI number?

The NPI number for Gillian Kupakuwana-suk is 1851748438. It was assigned to this individual provider in the NPPES registry on May 24, 2016.

Where is Gillian Kupakuwana-suk located?

Gillian Kupakuwana-suk practices at 15 York St Ynhh Dept Of Medicine, Lmp 1092, New Haven, CT 06510. The listed phone number is (203) 688-5555.

What is Gillian Kupakuwana-suk's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Is Gillian Kupakuwana-suk enrolled in Medicare?

Yes. Gillian Kupakuwana-suk 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.

Is Gillian Kupakuwana-suk affiliated with any hospitals?

According to CMS data, Gillian Kupakuwana-suk is affiliated with University Hospital S U N Y Health Science Center.

When was this NPI record last updated?

The NPPES record for Gillian Kupakuwana-suk was last updated on September 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.