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MARSHALL LEONARD MD
NPI 1902255318
Emergency Medicine in Stony Brook, NY

Active since June 07, 2016PECOS Enrolled
98.52/100
CMS Quality Rating
100 NICOLLS RD, HSC, L4 RM 50, STONY BROOK, NY 11794(631) 444-2478 Get Directions Write a Review

NPPES record last updated: July 29, 2020. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Jul 29, 2020, Jul 23, 2019 (2 updates tracked since 2019).

About Marshall Leonard Md NPPES

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

MARSHALL LEONARD MD (NPI 1902255318) is an individual emergency medicine provider in Stony Brook, New York, licensed in New York (298264) and active in the NPI registry since June 2016. He is enrolled in Medicare PECOS and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1902255318
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameMARSHALL LEONARDCredential: MD
Location Address100 NICOLLS RD, HSC, L4 RM 50Stony Brook, NY 11794-0001
Mailing AddressDepartment Of Emergency Medicine, 100 Nicolls Rd. Hsc, L-4, Rm 050Stony Brook, NY 11794 · (631) 444-2478
Phone(631) 444-2478
Sole ProprietorNo
Enumeration DateJune 7, 2016
Last NPPES UpdateJuly 29, 20202 updates tracked since enumeration
NPPES CertifiedJuly 29, 2020
✔ NPI 1902255318 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 · 298264
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
100 NICOLLS RD, HSC, L4 RM 50, Stony Brook, NY 11794
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Secondary Practice Locations 2

Location 1Stony Brook Medicine, Department of Emergency Medicine, HSC Level 4 Room 080Stony Brook, NY 11794-8350 · Phone (631) 444-3880 · Fax (631) 444-3919
Location 2Department of Emergency Medicine, 300 Community Dr.Manhasset, NY 11030 · Phone (516) 562-1238

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Marshall Leonard Md 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

2

Medicare enrollment records show Marshall Leonard reassigns Medicare billing to 2 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
0.3 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
North Shore-Lij Medical PC
32 mi
Urology
1010 NORTHERN BLVD STE 110
Great Neck, NY 11021
  • Reassigned Medicare billing, New York enrollment
  • 9,353 clinicians in this Medicare group
NPI 1053688572 (516) 321-7400

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

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.

Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
450 services443 patients
Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
88 services88 patients
Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
60 services59 patients
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223
Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.
20 services19 patients
Electrocardiogram (ecg) 1 to 3 leads with review by physician only 93042
An Electrocardiogram (ECG) is a non-invasive test that records the electrical activity of your heart. 1 to 3 leads or sensors are placed on your body to capture this data. A physician then reviews the results to evaluate your heart's health.
18 services18 patients

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.

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.

98.52/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality82.85
Promoting Interoperability100
Improvement Activities40

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 Marshall Leonard's NPI number?

The NPI number for Marshall Leonard is 1902255318. It was assigned to this individual provider in the NPPES registry on June 7, 2016.

Where is Marshall Leonard located?

Marshall Leonard practices at 100 Nicolls Rd, Hsc, L4 Rm 50, Stony Brook, NY 11794. The listed phone number is (631) 444-2478.

What is Marshall Leonard's specialty?

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

Is Marshall Leonard enrolled in Medicare?

Yes. Marshall Leonard is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Marshall Leonard's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marshall Leonard reassigns Medicare benefits to 2 organizations: Stony Brook Emergency Physicians, University Faculty Practice Corporat (Stony Brook, NY) and North Shore-Lij Medical PC (Great Neck, 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 Marshall Leonard'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 Marshall Leonard was last updated on July 29, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.