BRIAN JOSEPH MCMAHON MD
NPI 1801839550
Emergency Medicine in Patchogue, NY

Q: What is Brian Mcmahon's NPI number?

The NPI number for Brian Mcmahon is 1801839550. It was assigned to this individual provider in the NPPES registry on June 13, 2006.

Q: What is Brian Mcmahon's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Brian Mcmahon was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.

Active since June 13, 2006PECOS Enrolled

101 HOSPITAL RD, PATCHOGUE, NY 11772(631) 687-2953(610) 617-6280 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Brian Joseph Mcmahon Md NPPES

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

BRIAN JOSEPH MCMAHON MD (NPI 1801839550) is an individual emergency medicine provider in Patchogue, New York, licensed in New York (224721) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1801839550

Entity TypeIndividualMale

Primary Taxonomy207P00000X

Provider Legal NameBRIAN JOSEPH MCMAHONCredential: MD

Location Address101 HOSPITAL RDPatchogue, NY 11772

Mailing AddressPo Box 13700-1378Philadelphia, PA 19191-1378 · (800) 666-2455 · Fax (610) 617-6280

Phone(631) 687-2953

Fax(610) 617-6280

Sole ProprietorNo

Enumeration DateJune 13, 2006

Last NPPES UpdateJuly 13, 2026

✔ NPI 1801839550 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207P00000X

License✔ Licensed in NY · 224721

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.

101 HOSPITAL RD, Patchogue, NY 11772

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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)

Brian Joseph Mcmahon 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 Reassignment

Medicare enrollment records show Brian Mcmahon reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Stony Brook Emergency Physicians, University Faculty Practice Corporat

12 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

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 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.

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.

339 services332 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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 11772 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.

VAISHALI MEHTA MD

Internal Medicine (Critical Care Medicine)