DAVID TAYLOR GUERNSEY III DO, MPH
NPI 1689106833
Emergency Medicine - Pediatric Emergency Medicine in Brooklyn, NY

Q: What is David Guernsey's NPI number?

The NPI number for David Guernsey is 1689106833. It was assigned to this individual provider in the NPPES registry on March 28, 2017.

Q: What is David Guernsey's specialty?

The primary specialty registered for this NPI is Emergency Medicine, specializing in Pediatric Emergency Medicine, with taxonomy code 207PP0204X.

Q: When was this NPI record last updated?

The NPPES record for David Guernsey was last updated on August 16, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.

Active since March 28, 2017PECOS Enrolled

4802 10TH AVE, MAIMONIDES MEDICAL CENTER, BROOKLYN, NY 11219(718) 283-8000 Get Directions Write a Review

NPPES record last updated: August 16, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Aug 16, 2021, Mar 28, 2017 (2 updates tracked since 2017).

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About David Taylor Guernsey Iii Do, Mph NPPES

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

DAVID TAYLOR GUERNSEY III DO, MPH (NPI 1689106833) is an individual pediatric emergency medicine provider in Brooklyn, New York, licensed in New York (306374) and active in the NPI registry since March 2017. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1689106833

Entity TypeIndividualMale

Primary Taxonomy207PP0204X

Provider Legal NameDAVID TAYLOR GUERNSEY IIICredential: DO, MPH

Location Address4802 10TH AVE, MAIMONIDES MEDICAL CENTERBrooklyn, NY 11219

Mailing Address4802 10th Ave, Maimonides Medical CenterBrooklyn, NY 11219

Phone(718) 283-8000

Sole ProprietorYes

Enumeration DateMarch 28, 2017

Last NPPES UpdateAugust 16, 20212 updates tracked since enumeration

NPPES CertifiedAugust 16, 2021

✔ NPI 1689106833 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency Medicine · Pediatric Emergency MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207PP0204X

License✔ Licensed in NY · 306374

Definition

Pediatric Emergency Medicine is a clinical subspecialty that focuses on the care of the acutely ill or injured child in the setting of an emergency department.

4802 10TH AVE, Brooklyn, NY 11219

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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

David Taylor Guernsey Iii Do, Mph is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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

Medicare enrollment records show David Guernsey reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Brookdale Hospital Medical Center

3.1 mi

General Acute Care Hospital

1 BROOKDALE PLZ STE 666
Brooklyn, NY 11212

Reassigned Medicare billing, New York enrollment
782 clinicians in this Medicare group

NPI 1720028772 (718) 240-8352

New York University

1,032 mi

Cardiovascular Disease

3301 QUANTUM BLVD
Boynton Beach, FL 33426

Reassigned Medicare billing, New York enrollment
7,712 clinicians in this Medicare group

NPI 1285826438 (877) 648-2964

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 11219 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.

CARLOS BUZZETTA

Legal Medicine

4802 10TH AVE
BROOKLYN, NY 11219

Kings County (718) 283-8961

LOBELYS A ANICET PMHNP

Nurse Practitioner (Psychiatric/Mental Health)

4802 10TH AVE
BROOKLYN, NY 11219

Kings County (718) 283-5660

CHIAMAKA MEREMETOH MD

Student in an Organized Health Care Education/Training Program

4802 10TH AVE
BROOKLYN, NY 11219

Kings County (718) 283-6000

JESSE M. GALINA

Student in an Organized Health Care Education/Training Program

4802 10TH AVE
BROOKLYN, NY 11219

Kings County (718) 283-6000

DR. ABANOUB ALFY NAKHLA MD

Student in an Organized Health Care Education/Training Program

4802 10TH AVE
BROOKLYN, NY 11219

Kings County (718) 283-6000

CHRISTINE LI MD

Student in an Organized Health Care Education/Training Program

4802 10TH AVE
BROOKLYN, NY 11219

Kings County (718) 283-6000

MS. KATRINA W SOWERBY FNP

Nurse Practitioner (Family)

4802 10TH AVE, PRE-TESTING
BROOKLYN, NY 11219

Kings County (718) 283-7300

MAIMONIDES MEDICAL CENTER MAIMONIDES INFECTIOUS DISEASES FPP

Internal Medicine (Infectious Disease)

4802 10TH AVE
BROOKLYN, NY 11219

Kings County (718) 283-8773

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 David Guernsey's NPI number?

The NPI number for David Guernsey is 1689106833. It was assigned to this individual provider in the NPPES registry on March 28, 2017.

Where is David Guernsey located?

David Guernsey practices at 4802 10th Ave Maimonides Medical Center, Brooklyn, NY 11219. The listed phone number is (718) 283-8000.

What is David Guernsey's specialty?

The primary specialty registered for this NPI is Emergency Medicine, specializing in Pediatric Emergency Medicine, with taxonomy code 207PP0204X.

Is David Guernsey enrolled in Medicare?

Yes. David Guernsey is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for David Guernsey's services?

According to the CMS Revalidation Reassignment List (October 2026 release), David Guernsey reassigns Medicare benefits to 2 organizations: Brookdale Hospital Medical Center (Brooklyn, NY) and New York University (Boynton Beach, FL). 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 David Guernsey's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for David Guernsey was last updated on August 16, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.