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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.

DR. MARK JAN SZUMILEWICZ M.D.
NPI 1760430631
Emergency Medicine in Harlingen, TX

Active since May 04, 2006PECOS Enrolled
5501 S EXPRESSWAY 77, HARLINGEN, TX 78550(956) 423-3643 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Dr. Mark Jan Szumilewicz M.d. NPPES

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

DR. MARK JAN SZUMILEWICZ M.D. (NPI 1760430631) is an individual emergency medicine provider in Harlingen, Texas, licensed in Texas (J5032) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1760430631
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameDR. MARK JAN SZUMILEWICZCredential: M.D.
Location Address5501 S EXPRESSWAY 77Harlingen, TX 78550-3213
Mailing Address200 Corporate Blvd, Suite 201Lafayette, LA 70508-3870 · (800) 893-9698
Phone(956) 423-3643
Sole ProprietorNo
Enumeration DateMay 4, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1760430631 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in TX · J5032
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.
5501 S EXPRESSWAY 77, Harlingen, TX 78550
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas, CHRISTUS Health Plan, Oscar Insurance Company.Insurance ›

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. Mark Jan Szumilewicz M.d. 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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 78550 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
$84.92 typical visit price
range $54.84 – $166.88
Typical copayment $21.23 (range $13.71 – $41.72)
Most-billed visit code 99203
Established Patient
$97.05 typical visit price
range $17.52 – $136.11
Typical copayment $24.26 (range $4.38 – $34.02)
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.

DR. ABHINAV VEDIRE MD
Student in an Organized Health Care Education/Training Program
5501 S EXPRESSWAY 77
HARLINGEN, TX 78550
Cameron County (956) 365-1000
KEVIN THOMAS MD
Emergency Medicine
5501 S EXPRESSWAY 77
HARLINGEN, TX 78550
Cameron County (956) 365-1000
RIO GRANDE EMERGENCY PHYSICIANS PLLC
Emergency Medicine
5501 S EXPRESSWAY 77
HARLINGEN, TX 78550
Cameron County (877) 693-5700
MCINTOSH ANESTHESIOLOGY PLLC
Anesthesiology
5501 S EXPRESSWAY 77
HARLINGEN, TX 78550
Cameron County (254) 415-9739
MR. MUHAMMAD USMAN AHMED
Student in an Organized Health Care Education/Training Program
5501 S EXPRESSWAY 77
HARLINGEN, TX 78550
Cameron County (956) 365-1927
HMC RGV PHYSICIANS GROUP II
Orthopaedic Surgery
5501 S EXPRESSWAY 77
HARLINGEN, TX 78550
Cameron County (956) 365-1010
KRUPALI KANDACHIA MD
Student in an Organized Health Care Education/Training Program
5501 S EXPRESSWAY 77
HARLINGEN, TX 78550
Cameron County (956) 365-1926
SARAH GUZMAN
Pharmacist
5501 S EXPRESSWAY 77
HARLINGEN, TX 78550
Cameron County (956) 365-1000

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 Mark Szumilewicz's NPI number?

The NPI number for Mark Szumilewicz is 1760430631. It was assigned to this individual provider in the NPPES registry on May 4, 2006.

Where is Mark Szumilewicz located?

Mark Szumilewicz practices at 5501 S Expressway 77, Harlingen, TX 78550. The listed phone number is (956) 423-3643.

What is Mark Szumilewicz's specialty?

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

Is Mark Szumilewicz enrolled in Medicare?

Yes. Mark Szumilewicz is registered in the Medicare PECOS enrollment system.

What insurance does Mark Szumilewicz accept?

Health plans from Blue Cross and Blue Shield of Texas, CHRISTUS Health Plan and Oscar Insurance Company list Mark Szumilewicz as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Mark Szumilewicz 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 29 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.