Doctor profile · Federal record

Dr. Gillian Kupakuwana-Suk, M.D., PHD

Hematology & Oncology Physician (CMS: Hospitalist) · Internal Medicine Physician · New Haven, CT

  • NPI 1851748438
  • Accepts Medicare
  • MIPS 81.3 / 100 · 2023
  • 10 yrs in practice
  • Female
  • Solo practice
  • No sanctions

Practice & contact

NPPES Updated May 11, 2026
Primary practice
15 York St, Ynhh Dept of Medicine, Lmp 1092
New Haven, CT 065103221
(203) 688-5555
Mailing address
Dept. of Medicine Medical Service Group, 750 E. Adams St.
Syracuse, NY 13210

Credentials & registration

NPPES · NUCC
NPI registered
May 2016 — 10 yrs on file
Profile last updated
September 17, 2025
Year of graduation
2016 — 10 yrs since
Specialty taxonomy
207RH0003X — NUCC code
State license (1)
New York #298769

Federal sanctions & exclusions

OIG LEIE Updated May 11, 2026

No sanctions, exclusions or revocations on file

Checked against OIG LEIE on NPI 1851748438. Last verified May 11, 2026.

Medicare procedures · 2023

Top services delivered

CMS Provider Utilization
Total services
46
Distinct HCPCS
2
Medicare allowed
$6,510
HCPCS Description Services Patients Avg allowed
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 30 30 $127
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 16 16 $169

In context: peer comparison

Among 11 peers in this city , average services per provider: 368. This provider delivers 0.1× the peer median.

Hospital affiliations

CMS Hospital Compare

Frequently asked questions

Auto-generated from federal data
What is Dr. Gillian Kupakuwana-Suk's medical specialty?
Dr. Gillian Kupakuwana-Suk practices Hematology & Oncology Physician in New Haven, CT.
Where does Dr. Gillian Kupakuwana-Suk practice?
Dr. Gillian Kupakuwana-Suk practices at 15 York St, New Haven, CT 065103221. Office phone: 2036885555.
What is Dr. Gillian Kupakuwana-Suk's NPI?
Dr. Gillian Kupakuwana-Suk's National Provider Identifier (NPI) is 1851748438, issued by NPPES.
Does Dr. Gillian Kupakuwana-Suk accept Medicare assignment?
Yes. Dr. Gillian Kupakuwana-Suk accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Gillian Kupakuwana-Suk commonly perform?
Top Medicare-reported procedures in 2023: Initial hospital care with straightforward or low-level medical decision making (HCPCS 99222); Initial hospital care with moderate level of medical decision making (HCPCS 99223). Source: CMS Medicare Physician & Other Practitioners file.