UNITED GASTROENTEROLOGY ASSOCIATES PLLC
NPI 1538911318
Internal Medicine - Gastroenterology in Cypress, TX

Q: What is United Gastroenterology Associates PLLC's specialty?

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

Active since April 04, 2024CLIA 45D2336557 · Certificate of Compliance

21216 NORTHWEST FWY STE 640, CYPRESS, TX 77429(346) 340-4414(346) 340-4416 Get Directions Write a Review

NPPES record last updated: August 12, 2026. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Aug 12, 2026, Jan 26, 2026, Jan 20, 2026 and 3 more (6 updates tracked since 2024).

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About United Gastroenterology Associates Pllc NPPES

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

UNITED GASTROENTEROLOGY ASSOCIATES PLLC (NPI 1538911318) is a healthcare organization registered as a gastroenterology in Cypress, Texas and active in the NPI registry since April 2024. The organization holds a CLIA Certificate of Compliance certificate valid through July 29, 2028, maintains a secondary practice location in Katy, and lists Muhammad Ali Khan, Owner, as its authorized official.

NPPES Registry Identity

NPI1538911318

Entity TypeOrganization

Primary Taxonomy207RG0100X

Legal Business NameUNITED GASTROENTEROLOGY ASSOCIATES PLLC

Location Address21216 NORTHWEST FWY STE 640Cypress, TX 77429-4697

Mailing Address23144 Cinco Ranch Blvd Ste BKaty, TX 77494-2893 · (346) 340-4414 · Fax (346) 340-4416

Phone(346) 340-4414

Fax(346) 340-4416

Organization SubpartNo

Authorized OfficialMuhammad Ali KhanOwner · (346) 340-4414

Enumeration DateApril 4, 2024

Last NPPES UpdateAugust 12, 20266 updates tracked since enumeration

NPPES CertifiedAugust 12, 2026

✔ NPI 1538911318 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.

21216 NORTHWEST FWY STE 640, Cypress, TX 77429

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Secondary Practice Location 1

Location 123920 Katy Fwy Ste 555Katy, TX 77494-1341 · Phone (346) 340-4414 · Fax (346) 340-4416

Other Identifiers 1

Medicaid510218801TX

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)

United Gastroenterology Associates 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 United Gastroenterology Associates PLLC, which bills Medicare for the services this clinician delivers.

Clinician (1)

Muhammad Ali Khan, MD

Gastroenterology

NPI 1588913867

21216 NORTHWEST FWY STE 640
Cypress, TX 77429

(346) 340-4414

✔ 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.

CLIA Laboratory Certificates CMS CLIA

Laboratory certificates issued under the Clinical Laboratory Improvement Amendments (CLIA) program, which sets federal quality standards for human laboratory testing in the United States. There is no official CMS crosswalk between CLIA and NPI numbers; these certificates are associated with this NPI by matching facility names, locations and phone numbers in the CMS CLIA registry.

Certificate of Compliance 45D2336557

United Gastroenterology Associates · Cypress, TX

Active · expires Jul 29, 2028

CLIA Number45D2336557

Laboratory TypePhysician Office

Certificate Effective DateJuly 30, 2026

Certificate Expiration DateJuly 29, 2028

Laboratory DirectorDr. John Elgin

Laboratory Phone(346) 340-4414

Laboratory LocationUnited Gastroenterology Associates21216 Northwest Freeway Suite 640, Cypress, TX 77429

CLIA data matches this NPI record on: Name Phone

This certificate is issued to a laboratory after an inspection that finds the laboratory to be in compliance with all applicable CLIA requirements.

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 United Gastroenterology Associates PLLC's NPI number?

The NPI number for United Gastroenterology Associates PLLC is 1538911318. It was assigned to this organization in the NPPES registry on April 4, 2024.

Where is United Gastroenterology Associates PLLC located?

United Gastroenterology Associates PLLC is located at 21216 Northwest Fwy Ste 640, Cypress, TX 77429. The listed phone number is (346) 340-4414.

What is United Gastroenterology Associates PLLC's specialty?

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

Is United Gastroenterology Associates PLLC enrolled in Medicare?

Yes. United Gastroenterology Associates PLLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through United Gastroenterology Associates PLLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Gastroenterology) reassigns their Medicare billing to United Gastroenterology Associates 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.

Does United Gastroenterology Associates PLLC hold a CLIA laboratory certificate?

Yes. A Certificate of Compliance (number 45D2336557) is associated with this NPI, valid through July 29, 2028. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

When was this NPI record last updated?

The NPPES record for United Gastroenterology Associates PLLC was last updated on August 12, 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.