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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

MARC K O'CONNOR M.D.
NPI 1659364594
Pediatrics - Pediatric Emergency Medicine in Las Vegas, NV

Active since August 25, 2005
3186 S MARYLAND PKWY, LAS VEGAS, NV 89109(888) 350-2911(702) 369-5827 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Jul 13, 2026, Sep 11, 2025 (2 updates tracked since 2025).

About Marc K O'connor M.d. NPPES

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

MARC K O'CONNOR M.D. (NPI 1659364594) is an individual pediatric emergency medicine provider in Las Vegas, Nevada, licensed in Nevada (6862) and active in the NPI registry since August 2005.

NPPES Registry Identity

NPI1659364594
Entity TypeIndividualMale
Primary Taxonomy2080P0204X
Provider Legal NameMARC K O'CONNORCredential: M.D.
Location Address3186 S MARYLAND PKWYLas Vegas, NV 89109-2317
Mailing Address3006 S Maryland PkwyLas Vegas, NV 89109-2218 · (702) 697-0082 · Fax (702) 369-5827
Phone(888) 350-2911
Fax(702) 369-5827
Sole ProprietorNo
Enumeration DateAugust 25, 2005
Last NPPES UpdateJuly 13, 20262 updates tracked since enumeration
✔ NPI 1659364594 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatrics · Pediatric Emergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code2080P0204X
License✔ Licensed in NV · 6862
Definition
A pediatrician who has special qualifications to manage emergencies in infants and children.
Also ListedPediatricsTaxonomy 208000000X · License 6862 (NV)
3186 S MARYLAND PKWY, Las Vegas, NV 89109
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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.

RADIOLOGY SPECIALISTS, LTD.
Radiology (Vascular & Interventional Radiology)
3186 S MARYLAND PKWY
LAS VEGAS, NV 89109
Clark County (703) 961-5000
KAITLYN NICOLE WALDEN MD
Pediatrics
3186 S MARYLAND PKWY
LAS VEGAS, NV 89109
Clark County (702) 961-5437
ARASH ALBEKORD M.D.
Emergency Medicine
3186 S MARYLAND PKWY
LAS VEGAS, NV 89109
Clark County (702) 731-8000
JAMES CLAY LEE PHYSICIAN ASSISTANT
Physician Assistant
3186 S MARYLAND PKWY
LAS VEGAS, NV 89109
Clark County (702) 961-5000
JEMAL A BUSSE
Nurse Practitioner (Psychiatric/Mental Health)
3186 S MARYLAND PKWY
LAS VEGAS, NV 89109
Clark County (702) 415-3787
DR. BALAJI RAMASAMY M.D
Internal Medicine
3186 S MARYLAND PKWY
LAS VEGAS, NV 89109
Clark County (702) 731-8211
MARK H STEINHAUER, MD PC
Physical Medicine & Rehabilitation
3186 S MARYLAND PKWY
LAS VEGAS, NV 89109
Clark County (702) 731-8000
DR. ROYA LAURA MAHANA D.O.
Emergency Medicine
3186 S MARYLAND PKWY
LAS VEGAS, NV 89109
Clark County (702) 961-5000

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 Marc O'connor's NPI number?

The NPI number for Marc O'connor is 1659364594. It was assigned to this individual provider in the NPPES registry on August 25, 2005.

Where is Marc O'connor located?

Marc O'connor practices at 3186 S Maryland Pkwy, Las Vegas, NV 89109. The listed phone number is (888) 350-2911.

What is Marc O'connor's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Emergency Medicine, with taxonomy code 2080P0204X.

When was this NPI record last updated?

The NPPES record for Marc O'connor 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 38 days 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.