1. Home
  2. Directory
  3. Connecticut
  4. New Haven
  5. Surgery
  6. NPI Profile

MR. GREGORY ZANIESKI MD
NPI 1235320474
Surgery - Surgical Oncology in New Haven, CT

Active since August 05, 2007PECOS EnrolledAccepts Medicare Assignment
73.56/100
CMS Quality Rating
SMILOW CANCER HOSPITAL AT YALE-NEW HAVEN, 35 PARK STREET, 8TH FLOOR CLINIC, NEW HAVEN, CT 06510(203) 785-3577(203) 737-4067 Get Directions Write a Review

NPPES record last updated: July 30, 2019. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jul 30, 2019, Nov 15, 2018 (2 updates tracked since 2018).

About Mr. Gregory Zanieski Md NPPES

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

MR. GREGORY ZANIESKI MD (NPI 1235320474) is an individual surgical oncology provider in New Haven, Connecticut, licensed in Connecticut (62463) and active in the NPI registry since August 2007. He is enrolled in Medicare PECOS and is a graduate of State University Of New York At Stony Brook, School Of Medicine (2002).

NPPES Registry Identity

NPI1235320474
Entity TypeIndividualMale
Primary Taxonomy2086X0206X
Provider Legal NameMR. GREGORY ZANIESKICredential: MD
Location AddressSMILOW CANCER HOSPITAL AT YALE-NEW HAVEN, 35 PARK STREET, 8TH FLOOR CLINICNew Haven, CT 06510
Mailing AddressP.o. Box 208062, 330 Cedar St, Fmb130, Department Of Surgery, Section Of Surgical OncologyNew Haven, CT 06520 · (203) 785-3577
Phone(203) 785-3577
Fax(203) 737-4067
Sole ProprietorNo
Medical School CMSState University Of New York At Stony Brook, School Of MedicineGraduated 2002
Enumeration DateAugust 5, 2007
Last NPPES UpdateJuly 30, 20192 updates tracked since enumeration
✔ NPI 1235320474 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtySurgery · Surgical OncologyAllopathic & Osteopathic Physicians
Taxonomy Code2086X0206X
Licenses✔ Licensed in CT · 62463✔ Licensed in PA · MD432356✔ Licensed in NY · 256848
Definition
A surgical oncologist is a well-qualified surgeon who has obtained additional training and experience in the multidisciplinary approach to the prevention, diagnosis, treatment, and rehabilitation of cancer patients, and devotes a major portion of his or her professional practice to these activities and cancer research.
Also ListedSurgeryTaxonomy 208600000X · License MD432356 (PA), 256848 (NY)
SMILOW CANCER HOSPITAL AT YALE-NEW HAVEN, New Haven, CT 06510
Open in Google Maps ↗

Other Identifiers 1

Medicaid03227869NY

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

Mr. Gregory Zanieski Md 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 ID446342075
PECOS Enrollment IDI20190729003574
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.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
78 services66 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
18 services18 patients

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
$75.55 typical visit price
range $19.76 – $149.26
Typical copayment $18.88 (range $4.94 – $37.31)
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.

73.56/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality75.84
Promoting Interoperability74
Improvement Activities40
Cost51.43

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 Gregory Zanieski's NPI number?

The NPI number for Gregory Zanieski is 1235320474. It was assigned to this individual provider in the NPPES registry on August 5, 2007.

Where is Gregory Zanieski located?

Gregory Zanieski practices at Smilow Cancer Hospital At Yale-New Haven 35 Park Street, 8th Floor Clinic, New Haven, CT 06510. The listed phone number is (203) 785-3577.

What is Gregory Zanieski's specialty?

The primary specialty registered for this NPI is Surgery, specializing in Surgical Oncology, with taxonomy code 2086X0206X.

Is Gregory Zanieski enrolled in Medicare?

Yes. Gregory Zanieski 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 Gregory Zanieski was last updated on July 30, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 years 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.