1. Home
  2. Directory
  3. New York
  4. Stony Brook
  5. Emergency Medicine
  6. NPI Profile

ALEXANDRA HAILEY DONNELLY DO
NPI 1518543156
Emergency Medicine in Stony Brook, NY

Active since March 23, 2021PECOS EnrolledAccepts Medicare Assignment
101 NICOLLS ROAD, HSC LEVEL 4, 050, STONY BROOK, NY 11794(631) 444-3880(631) 444-3919 Get Directions Write a Review

NPPES record last updated: September 24, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 24, 2024, Mar 23, 2021 (2 updates tracked since 2021).

About Alexandra Hailey Donnelly Do NPPES

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

ALEXANDRA HAILEY DONNELLY DO (NPI 1518543156) is an individual emergency medicine provider in Stony Brook, New York, licensed in New York (328616) and active in the NPI registry since March 2021. She is enrolled in Medicare PECOS, is affiliated with Suny/stony Brook University Hospital, and maintains a secondary practice location in Smithtown.

NPPES Registry Identity

NPI1518543156
Entity TypeIndividualFemale
Primary Taxonomy207P00000X
Provider Legal NameALEXANDRA HAILEY DONNELLYCredential: DO
Location Address101 NICOLLS ROAD, HSC LEVEL 4, 050Stony Brook, NY 11794
Mailing Address101 Nicolls Road, Hsc Level 4, 050Stony Brook, NY 11794 · (631) 444-3880 · Fax (631) 444-3919
Phone(631) 444-3880
Fax(631) 444-3919
Sole ProprietorNo
Medical School CMSOtherGraduated 2021
Enumeration DateMarch 23, 2021
Last NPPES UpdateSeptember 24, 20242 updates tracked since enumeration
NPPES CertifiedSeptember 24, 2024
✔ NPI 1518543156 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in NY · 328616
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
101 NICOLLS ROAD, Stony Brook, NY 11794
Open in Google Maps ↗

Secondary Practice Location 1

Location 150 New York Ave # 25ASmithtown, NY 11787-3448 · Phone (631) 862-3000

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Alexandra Hailey Donnelly Do 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 ID4880127752
PECOS Enrollment IDI20241030003187
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.

Medicare Billing Reassignments

3

Medicare enrollment records show Alexandra Donnelly reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Stony Brook Emergency Physicians, University Faculty Practice Corporat
0.5 mi
Emergency Medicine
SUNY @ STONY BROOK, UNIVERSITY HOSPITAL, L4, RM 515
Stony Brook, NY 11794
  • Reassigned Medicare billing, New York enrollment
  • 77 clinicians in this Medicare group
NPI 1265487672 (631) 444-2406
Port Emergency Medical Services, P.C.
3.8 mi
Emergency Medicine
200 BELLE TERRE RD
Port Jefferson, NY 11777
  • Reassigned Medicare billing, New York enrollment
  • Medicare enrollment name: Port Emergency Medical Services PC
  • 90 clinicians in this Medicare group
NPI 1912988395 (844) 474-4019
Siena Emergency Medical Services, P.C.
6.3 mi
Emergency Medicine
50 ROUTE 25A
Smithtown, NY 11787
  • Reassigned Medicare billing, New York enrollment
  • Medicare enrollment name: Siena Emergency Medical Services PC
  • 55 clinicians in this Medicare group
NPI 1356507099 (844) 474-4019

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Hospital Affiliations CMS Care Compare 2

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

Suny/Stony Brook University Hospital

Acute Care Hospitals · Stony Brook, NY
4/5 CMS rating
OwnershipGovernment - State
CMS Certification Number330393
LocationHealth Sciences Center SunyStony Brook, NY 11794 · Suffolk County
Emergency services Birthing friendly

St Catherine Of Siena Hospital Medical Center

Acute Care Hospitals · Smithtown, NY
3/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number330401
Location50 Route 25ASmithtown, NY 11787 · Suffolk County
Emergency services Birthing friendly

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
$105.06 typical visit price
range $67.40 – $203.53
Typical copayment $26.26 (range $16.85 – $50.88)
Most-billed visit code 99203
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.

MUZAMMIL KHAN MD
Internal Medicine (Endocrinology, Diabetes & Metabolism)
101 NICOLLS ROAD, HSC T16-020
STONY BROOK, NY 11794
Suffolk County (631) 444-8478
JUSTIN ALEXANDER BELL MD
Anesthesiology
101 NICOLLS ROAD, DEPARTMENT OF ANESTHESIOLOGY, HSC LEVEL 4, ROOM 060
STONY BROOK, NY 11794
Suffolk County (631) 444-2975
PHILLIP YEUN
Student in an Organized Health Care Education/Training Program
101 NICOLLS ROAD, HEALTH SCIENCE CENTER T16, ROOM 020
STONY BROOK, NY 11794
Suffolk County (631) 444-7411
PRIYANKA RAMACHANDRA MD
Student in an Organized Health Care Education/Training Program
101 NICOLLS ROAD, DEPARTMENT OF SURGERY, HSC T-19, 030
STONY BROOK, NY 11794
Suffolk County (631) 444-1791
DR. GABRIELLA NICOLE PINHO M.D.
Obstetrics & Gynecology
101 NICOLLS ROAD, HSC 9, ROOM 020
MOUNT SINDAI, NY 11794
Suffolk County (631) 444-3987
DR. BAHAA E DAOUD MD
Anesthesiology
101 NICOLLS ROAD, HSC LEVEL 4 ROOM 60
STONY BROOK, NY 11794
Suffolk County (631) 444-2078
DR. ALLISON PERNICE MD
Student in an Organized Health Care Education/Training Program
101 NICOLLS ROAD, DEPARTMENT OF SURGERY, HSC T-19, 030
STONY BROOK, NY 11794
Suffolk County (631) 444-1791
DR. DAWEI WU DO
Student in an Organized Health Care Education/Training Program
101 NICOLLS ROAD, HEALTH SCIENCES CENTER LEVEL 4, ROOM 176
STONY BROOK, NY 11794
Suffolk County (631) 638-8517

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 Alexandra Donnelly's NPI number?

The NPI number for Alexandra Donnelly is 1518543156. It was assigned to this individual provider in the NPPES registry on March 23, 2021.

Where is Alexandra Donnelly located?

Alexandra Donnelly practices at 101 Nicolls Road Hsc Level 4, 050, Stony Brook, NY 11794. The listed phone number is (631) 444-3880.

What is Alexandra Donnelly's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Alexandra Donnelly enrolled in Medicare?

Yes. Alexandra Donnelly 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.

Which organizations bill Medicare for Alexandra Donnelly's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Alexandra Donnelly reassigns Medicare benefits to 3 organizations: Stony Brook Emergency Physicians, University Faculty Practice Corporat (Stony Brook, NY), Port Emergency Medical Services, P.C. (Port Jefferson, NY) and Siena Emergency Medical Services, P.C. (Smithtown, NY). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Alexandra Donnelly's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Alexandra Donnelly affiliated with any hospitals?

According to CMS data, Alexandra Donnelly is affiliated with Suny/Stony Brook University Hospital and St Catherine Of Siena Hospital Medical Center.

When was this NPI record last updated?

The NPPES record for Alexandra Donnelly was last updated on September 24, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.