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LARISSA A SZEYKO, M D PLLC
NPI 1649566837
Internal Medicine - Infectious Disease in El Paso, TX

Active since June 26, 2011
2101 N OREGON ST, EL PASO, TX 79902(915) 577-7840(915) 577-7822 Get Directions Write a Review

NPPES record last updated: June 26, 2011. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Larissa A Szeyko, M D Pllc NPPES

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

LARISSA A SZEYKO, M D PLLC (NPI 1649566837) is a healthcare organization registered as an infectious disease in El Paso, Texas and active in the NPI registry since June 2011. The organization lists Larissa A Szeyko, President, as its authorized official.

NPPES Registry Identity

NPI1649566837
Entity TypeOrganization
Primary Taxonomy207RI0200X
Legal Business NameLARISSA A SZEYKO, M D PLLC
Location Address2101 N OREGON STEl Paso, TX 79902-3346
Mailing Address4 Mina Perdida StEl Paso, TX 79902-2204 · (915) 351-6600 · Fax (520) 351-6601
Phone(915) 577-7840
Fax(915) 577-7822
Organization SubpartNo
Authorized OfficialLarissa A SzeykoPresident · (520) 250-6184
Enumeration DateJune 26, 2011
✔ NPI 1649566837 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Infectious DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RI0200X
License✔ Licensed in TX · M7675
Definition
An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.
2101 N OREGON ST, El Paso, TX 79902
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Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Larissa A Szeyko, M D Pllc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Larissa A Szeyko, M D PLLC, which bills Medicare for the services this clinician delivers.

Clinician (1)

Larissa Szeyko, M.D.
Internal Medicine
NPI 1497961197
2101 N OREGON ST
El Paso, TX 79902
(915) 577-7840
✔ PECOS✔ Accepts MedicareSame address

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

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 Larissa A Szeyko, M D PLLC's NPI number?

The NPI number for Larissa A Szeyko, M D PLLC is 1649566837. It was assigned to this organization in the NPPES registry on June 26, 2011.

Where is Larissa A Szeyko, M D PLLC located?

Larissa A Szeyko, M D PLLC is located at 2101 N Oregon St, El Paso, TX 79902. The listed phone number is (915) 577-7840.

What is Larissa A Szeyko, M D PLLC's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.

Is Larissa A Szeyko, M D PLLC enrolled in Medicare?

Yes. Larissa A Szeyko, M D PLLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Larissa A Szeyko, M D PLLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Internal Medicine) reassigns their Medicare billing to Larissa A Szeyko, M D PLLC. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Larissa A Szeyko, M D PLLC was last updated on June 26, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.