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GASTROENTEROLOGY ASSOCIATES
NPI 1124064589
Internal Medicine - Gastroenterology in Las Vegas, NV

Active since June 22, 2006
6950 S CIMARRON RD STE 200, LAS VEGAS, NV 89113(702) 796-0231(702) 796-5211 Get Directions Write a Review

NPPES record last updated: September 20, 2018. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Gastroenterology Associates NPPES

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

GASTROENTEROLOGY ASSOCIATES (NPI 1124064589) is a healthcare organization registered as a gastroenterology in Las Vegas, Nevada and active in the NPI registry since June 2006. The organization lists Gregory Martin Kwok, Managing Partner, as its authorized official.

NPPES Registry Identity

NPI1124064589
Entity TypeOrganization
Primary Taxonomy207RG0100X
Legal Business NameFRANK J NEMEC M D LTD
Location Address6950 S CIMARRON RD STE 200Las Vegas, NV 89113-2135
Mailing AddressPo Box 50794Henderson, NV 89016-0794 · (702) 796-0231 · Fax (702) 796-5211
Phone(702) 796-0231
Fax(702) 796-5211
Organization SubpartNo
Authorized OfficialGregory Martin KwokManaging Partner · (702) 796-0231
Enumeration DateJune 22, 2006
Last NPPES UpdateSeptember 20, 2018
✔ NPI 1124064589 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
6950 S CIMARRON RD STE 200, Las Vegas, NV 89113
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Other Names 1

Doing Business AsGastroenterology Associates

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)

Gastroenterology Associates is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

10

Medicare enrollment records show 10 clinicians reassign Medicare billing to Gastroenterology Associates, which bills Medicare for the services they deliver. Of these, 8 practice at this address. They are listed nearest first.

Clinicians by Medicare Specialty 2

Gastroenterology7
Certified Registered Nurse Anesthetist (CRNA)3

Clinicians, nearest first (10)

Brent Burnette, MD
Gastroenterology
NPI 1699989251
6950 S CIMARRON RD STE 200
Las Vegas, NV 89113
(702) 796-0231
✔ PECOS✔ Accepts MedicareSame address
Donald Kwok, M.D.
Gastroenterology
NPI 1477505766
6950 S CIMARRON RD STE 200
Las Vegas, NV 89113
(702) 796-0231
✔ PECOS✔ Accepts MedicareSame address
Gregory Kwok, M.D.
Gastroenterology
NPI 1952353997
6950 S CIMARRON RD STE 200
Las Vegas, NV 89113
(702) 796-0231
✔ PECOS✔ Accepts MedicareSame address
Elizabeth Magsanoc, CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1508839085
6950 S CIMARRON RD STE 200
Las Vegas, NV 89113
(702) 796-0231
✔ Accepts MedicareSame address
Frank Nemec, M.D.
Gastroenterology
NPI 1629045786
6950 S CIMARRON RD STE 200
Las Vegas, NV 89113
(702) 796-0231
✔ PECOS✔ Accepts MedicareSame address
Cissie Walker, CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1891763462
6950 S CIMARRON RD STE 200
Las Vegas, NV 89113
(702) 796-0231
✔ Accepts MedicareSame address
Travis Vickers, D.O.
Gastroenterology
NPI 1295095511
6950 S CIMARRON RD STE 200
Las Vegas, NV 89113
(702) 796-0231
✔ PECOS✔ Accepts MedicareSame address
Katrina Naik, MD
Gastroenterology
NPI 1669969051
6950 S CIMARRON RD STE 200
Las Vegas, NV 89113
(702) 796-0231
✔ PECOS✔ Accepts MedicareSame address
Lee Thompson, CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1811949274
129 W LAKE MEAD PKWY
Henderson, NV 89015
(702) 564-4440
16 mi
Rohtashav Dhir, M.D., M.P.H,
Gastroenterology
NPI 1881808715
8901 INDIAN HILLS DR STE 200
Omaha, NE 68114
(402) 397-7057
✔ PECOS✔ Accepts Medicare1,097 mi

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 Frank J Nemec M D Ltd's NPI number?

The NPI number for Frank J Nemec M D Ltd is 1124064589. It was assigned to this organization in the NPPES registry on June 22, 2006. The provider is doing business as Gastroenterology Associates.

Where is Frank J Nemec M D Ltd located?

Frank J Nemec M D Ltd is located at 6950 S Cimarron Rd Ste 200, Las Vegas, NV 89113. The listed phone number is (702) 796-0231.

What is Frank J Nemec M D Ltd's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Frank J Nemec M D Ltd enrolled in Medicare?

Yes. Frank J Nemec M D Ltd is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Frank J Nemec M D Ltd?

According to the CMS Revalidation Reassignment List (October 2026 release), 10 clinicians in 2 Medicare specialties reassign their Medicare billing to Frank J Nemec M D Ltd. 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. The largest specialties are Gastroenterology (7) and Certified Registered Nurse Anesthetist (CRNA) (3). Of these, 8 practice at this address. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

When was this NPI record last updated?

The NPPES record for Frank J Nemec M D Ltd was last updated on September 20, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.