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DR. GERALDINE C. DIAZ D.O.
NPI 1003987967
Anesthesiology in Brentwood, NY

Active since November 13, 2006PECOS Enrolled
601 SUFFOLK AVE, BRENTWOOD, NY 11717(631) 231-4455 Get Directions Write a Review

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

Record update history: Jan 30, 2026, Oct 10, 2018, Mar 17, 2018 and 1 more (4 updates tracked since 2018).

About Dr. Geraldine C. Diaz D.o. NPPES

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

DR. GERALDINE C. DIAZ D.O. (NPI 1003987967) is an individual anesthesiology provider in Brentwood, New York, licensed in New York (225683) and active in the NPI registry since November 2006. She is enrolled in Medicare PECOS, is affiliated with Montefiore Medical Center, and maintains 4 additional practice locations.

NPPES Registry Identity

NPI1003987967
Entity TypeIndividualFemale
Primary Taxonomy207L00000X
Provider Legal NameDR. GERALDINE C. DIAZCredential: D.O.
Location Address601 SUFFOLK AVEBrentwood, NY 11717-4309
Mailing Address450 Clarkson Ave Ste 6Brooklyn, NY 11203-2012 · (718) 270-2331
Phone(631) 231-4455
Sole ProprietorNo
Medical School CMSPhiladelphia College Of Osteopathic MedicineGraduated 2001
Enumeration DateNovember 13, 2006
Last NPPES UpdateJanuary 30, 20264 updates tracked since enumeration
NPPES CertifiedJanuary 30, 2026
✔ NPI 1003987967 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
Licenses✔ Licensed in NY · 225683✔ Licensed in IL · 036126434
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
Also ListedAnesthesiology · Critical Care MedicineTaxonomy 207LC0200X · License 036126434 (IL)
601 SUFFOLK AVE, Brentwood, NY 11717
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Secondary Practice Locations 4

Location 11740 W Taylor St Ste 3200WChicago, IL 60612-7232 · Phone (312) 996-4020
Location 2450 Clarkson Ave Ste 6Brooklyn, NY 11203 · Phone (718) 270-2331
Location 35841 S Maryland Ave, MC 4028Chicago, IL 60637-1447 · Phone (773) 926-1220
Location 41500 William Floyd PkwyShirley, NY 11967-1800 · Phone (631) 205-9090

Other Identifiers 1

OtherZ120519AZ · Medicare

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Geraldine C. Diaz D.o. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID3375544935
PECOS Enrollment IDI20070124000564
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 5

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.

Anesthesia for lens surgery 00142
Anesthesia for lens surgery involves administering medication to numb the eye area, ensuring you feel no pain during the procedure. This can be a local anesthetic (numbing only the eye area) or general (where you're asleep). It helps make the surgery comfortable and stress-free.
268 services262 patients
Anesthesia for other procedure on eye 00140
Anesthesia for an eye procedure involves administering medication to numb your eye and surrounding area, ensuring you feel no pain during the operation. It can be local (only the eye area) or general (whole body). It's safe and helps make the procedure comfortable.
197 services194 patients
Anesthesia for procedure on eyelid 00103
Anesthesia for an eyelid procedure helps ensure comfort and painlessness during the operation. It's typically a local anesthetic, applied to numb your eyelid and surrounding area. You'll likely be awake but won't feel any discomfort. It's a safe, routine part of many eye procedures.
71 services69 patients
Anesthesia for retinal surgery 00145
Anesthesia for retinal surgery involves using medications to numb your eye and surrounding area. This prevents pain and discomfort during the procedure. You may also receive medication to help you relax. The anesthesia can be local (just your eye) or general (you're asleep).
21 services21 patients
Anesthesia for other procedure on skin, muscles, or nerves of head, neck, and upper back 00300
Anesthesia for procedures on skin, muscles, or nerves of the head, neck, and upper back involves using medication to numb the area or make you unconscious during the procedure. This ensures you don't feel pain or discomfort. It's safe and monitored by professionals.
12 services12 patients

Hospital Affiliations CMS Care Compare

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

Montefiore Medical Center

Acute Care Hospitals · Bronx, NY
2/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number330059
Location111 East 210th StreetBronx, NY 10467 · Bronx County
Emergency services Birthing friendly

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.

LONG ISLAND EYE SURGICAL CARE, PC
Ophthalmology
601 SUFFOLK AVE
BRENTWOOD, NY 11717
Suffolk County (631) 231-4455
ANTHONY MARTINEZ OD
Optometrist
601 SUFFOLK AVE
BRENTWOOD, NY 11717
Suffolk County (855) 295-4144
SUFFOLK ORAL SURGERY ASSOCIATES LLP
Dentist (Oral and Maxillofacial Surgery)
601 SUFFOLK AVE, SUITE 2
BRENTWOOD, NY 11717
Suffolk County (631) 273-4888
DR. NEIL SCOTT NICHOLS M.D.
Ophthalmology
601 SUFFOLK AVE
BRENTWOOD, NY 11717
Suffolk County (855) 295-4144
DR. AARON AVNI MD
Ophthalmology
601 SUFFOLK AVE
BRENTWOOD, NY 11717
Suffolk County (631) 231-4455
RAJU SARWAL MD
Ophthalmology
601 SUFFOLK AVE
BRENTWOOD, NY 11717
Suffolk County (631) 231-4455
DR. CATHERINE CARMELA SCANDIFFIO O.D.
Optometrist
601 SUFFOLK AVE
BRENTWOOD, NY 11717
Suffolk County (631) 231-4455
SHETAL AMIT SHAH M.D.
Ophthalmology
601 SUFFOLK AVE
BRENTWOOD, NY 11717
Suffolk County (631) 665-2455

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 Geraldine Diaz's NPI number?

The NPI number for Geraldine Diaz is 1003987967. It was assigned to this individual provider in the NPPES registry on November 13, 2006.

Where is Geraldine Diaz located?

Geraldine Diaz practices at 601 Suffolk Ave, Brentwood, NY 11717. The listed phone number is (631) 231-4455.

What is Geraldine Diaz's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is Geraldine Diaz enrolled in Medicare?

Yes. Geraldine Diaz is registered in the Medicare PECOS enrollment system.

Is Geraldine Diaz affiliated with any hospitals?

According to CMS data, Geraldine Diaz is affiliated with Montefiore Medical Center.

When was this NPI record last updated?

The NPPES record for Geraldine Diaz was last updated on January 30, 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.