1. Home
  2. Directory
  3. Texas
  4. Katy
  5. Internal Medicine
  6. NPI Profile

HOUSTON GASTRO INSTITUTE PLLC
NPI 1811238454
Internal Medicine - Gastroenterology in Katy, TX

Active since March 06, 2013CLIA 45D2222830 · Certificate of Compliance
25230 KINGSLAND BLVD STE 101, KATY, TX 77494(281) 746-9284(877) 327-8082 Get Directions Write a Review

NPPES record last updated: February 18, 2022. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Houston Gastro Institute Pllc NPPES

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

HOUSTON GASTRO INSTITUTE PLLC (NPI 1811238454) is a healthcare organization registered as a gastroenterology in Katy, Texas and active in the NPI registry since March 2013. The organization holds a CLIA Certificate of Compliance certificate valid through July 28, 2027 and lists Vivian A Asamoah, Physician, as its authorized official.

NPPES Registry Identity

NPI1811238454
Entity TypeOrganization
Primary Taxonomy207RG0100X
Legal Business NameHOUSTON GASTRO INSTITUTE PLLC
Location Address25230 KINGSLAND BLVD STE 101Katy, TX 77494-2097
Mailing Address25230 Kingsland Blvd Ste 101Katy, TX 77494-2097 · (281) 746-9284 · Fax (877) 327-8082
Phone(281) 746-9284
Fax(877) 327-8082
Organization SubpartNo
Authorized OfficialVivian A AsamoahPhysician · (410) 940-0561
Enumeration DateMarch 6, 2013
Last NPPES UpdateFebruary 18, 2022
NPPES CertifiedFebruary 18, 2022
✔ NPI 1811238454 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
License✔ Licensed in TX · P0163
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.
25230 KINGSLAND BLVD STE 101, Katy, TX 77494
Open in Google Maps ↗

Other Identifiers 1

OtherP0163TX · License

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

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include WellPoint.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Houston Gastro Institute Pllc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

6

Medicare enrollment records show 6 clinicians reassign Medicare billing to Houston Gastro Institute PLLC, which bills Medicare for the services they deliver. Of these, 2 practice within 10 miles. They are listed nearest first.

Clinicians, nearest first (6)

Vivian Asamoah, MD
Gastroenterology
NPI 1326191081
25230 KINGSLAND BLVD STE 101
Katy, TX 77494
(281) 746-9284
✔ PECOS✔ Accepts Medicare1.1 mi
Ting-Hui Hsieh, M.D.
Internal Medicine
NPI 1326234667
25230 KINGSLAND BLVD STE 101
Katy, TX 77494
(281) 746-9284
✔ PECOS1.1 mi
Omowumi Akande
Nurse Practitioner
NPI 1750964813
11445 COMPAQ CENTER WEST DR
Houston, TX 77070
(281) 429-8527
✔ PECOS21 mi
Nicole Harris, MS, RDN, LD, IFNCP
Registered Dietitian or Nutrition Professional
NPI 1184123523
2681 GATTIS SCHOOL RD STE 140
Round Rock, TX 78664
(512) 726-2120
✔ Accepts Medicare121 mi
Olivia Beall, RDN
Registered Dietitian or Nutrition Professional
NPI 1831976695
1521 N HUDSON AVE
Oklahoma City, OK 73103
(405) 365-7221
✔ Accepts Medicare407 mi
Lucia Kaufer, RD
Registered Dietitian or Nutrition Professional
NPI 1043915697
23122 GAINFORD ST
Woodland Hills, CA 91364
(818) 427-4629
1,371 mi

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 45D2222830

Houston Gastro Institute, PLLC · Katy, TX
Active · expires Jul 28, 2027
CLIA Number45D2222830
Laboratory TypePhysician Office
Certificate Effective DateJuly 29, 2025
Certificate Expiration DateJuly 28, 2027
Laboratory DirectorDr. John Elgin
Laboratory Phone(281) 746-9284
Laboratory LocationHouston Gastro Institute, PLLC25230 Kingsland Blvd, Ste 101, Katy, TX 77494
CLIA data matches this NPI record on: Address 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 Houston Gastro Institute PLLC's NPI number?

The NPI number for Houston Gastro Institute PLLC is 1811238454. It was assigned to this organization in the NPPES registry on March 6, 2013.

Where is Houston Gastro Institute PLLC located?

Houston Gastro Institute PLLC is located at 25230 Kingsland Blvd Ste 101, Katy, TX 77494. The listed phone number is (281) 746-9284.

What is Houston Gastro Institute PLLC's specialty?

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

Is Houston Gastro Institute PLLC enrolled in Medicare?

Yes. Houston Gastro Institute PLLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Houston Gastro Institute PLLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 6 clinicians in 4 Medicare specialties reassign their Medicare billing to Houston Gastro Institute 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. The largest specialties are Registered Dietitian or Nutrition Professional (3), Gastroenterology (1) and Internal Medicine (1). Of these, 2 practice within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Houston Gastro Institute PLLC hold a CLIA laboratory certificate?

Yes. A Certificate of Compliance (number 45D2222830) is associated with this NPI, valid through July 28, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

What insurance does Houston Gastro Institute PLLC accept?

Health plans from WellPoint list Houston Gastro Institute PLLC 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 Houston Gastro Institute PLLC was last updated on February 18, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.