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GSI ASC, LLC
NPI 1306214705
Clinic/Center - Ambulatory Surgical in Tulsa, OK

Active since September 02, 2015CLIA 37D0924800 · Waiver
10210 E 91ST ST, TULSA, OK 74133(918) 940-8500(918) 940-8399 Get Directions Write a Review

NPPES record last updated: April 28, 2022. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Apr 28, 2022, Sep 30, 2015 (2 updates tracked since 2015).

About Gsi Asc, Llc NPPES

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

GSI ASC, LLC (NPI 1306214705) is a healthcare organization registered as an ambulatory surgical in Tulsa, Oklahoma and active in the NPI registry since September 2015. The organization holds a CLIA Waiver certificate valid through February 6, 2027 and lists John Hood, Ceo, as its authorized official.

NPPES Registry Identity

NPI1306214705
Entity TypeOrganization
Primary Taxonomy261QA1903X
Legal Business NameGSI ASC, LLC
Location Address10210 E 91ST STTulsa, OK 74133-5834
Mailing Address10210 E 91st StTulsa, OK 74133-5834 · (918) 940-8500 · Fax (918) 940-8399
Phone(918) 940-8500
Fax(918) 940-8399
Organization SubpartNo
Authorized OfficialJohn HoodCeo · (918) 940-8500
Enumeration DateSeptember 2, 2015
Last NPPES UpdateApril 28, 20222 updates tracked since enumeration
NPPES CertifiedApril 28, 2022
✔ NPI 1306214705 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyClinic/Center · Ambulatory SurgicalAmbulatory Health Care Facilities
Taxonomy Code261QA1903X
10210 E 91ST ST, Tulsa, OK 74133
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan, Ambetter from Superior HealthPlan and more.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)

Gsi Asc, Llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

13

Medicare enrollment records show 13 clinicians reassign Medicare billing to Gsi ASC, LLC, which bills Medicare for the services they deliver. Of these, 10 practice at this address and 12 within 10 miles. They are listed nearest first.

Clinicians by Medicare Specialty 2

Gastroenterology8
Certified Registered Nurse Anesthetist (CRNA)5

Clinicians, nearest first (13)

Geoffrey Fillmore, D.O.
Gastroenterology
NPI 1013022680
10210 E 91ST ST
Tulsa, OK 74133
(918) 940-8500
✔ PECOS✔ Accepts MedicareSame address
David Morris, D.O.
Gastroenterology
NPI 1952367393
10210 E 91ST ST
Tulsa, OK 74133
(918) 940-8500
✔ PECOS✔ Accepts MedicareSame address
Hollie Shipley, APRN-CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1922342351
10210 E 91ST ST
Tulsa, OK 74133
(918) 940-8500
Same address
Roy Thompson, M.D.
Gastroenterology
NPI 1053599951
10210 E 91ST ST
Tulsa, OK 74133
(918) 940-8500
✔ PECOS✔ Accepts MedicareSame address
Jeffrey Bigler, M.D.
Gastroenterology
NPI 1164419362
10210 E 91ST ST
Tulsa, OK 74133
(918) 940-8500
✔ PECOS✔ Accepts MedicareSame address
William Briggs, M.D.
Gastroenterology
NPI 1730176884
10210 E 91ST ST
Tulsa, OK 74133
(918) 940-8500
✔ PECOS✔ Accepts MedicareSame address
John Hood, M.D.
Gastroenterology
NPI 1235126426
10210 E 91ST ST
Tulsa, OK 74133
(918) 940-8500
✔ PECOS✔ Accepts MedicareSame address
Michael Martin, M.D.
Gastroenterology
NPI 1750378899
10210 E 91ST ST
Tulsa, OK 74133
(918) 940-8500
✔ PECOS✔ Accepts MedicareSame address
Jennifer Young, CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1881990703
10210 E 91ST ST
Tulsa, OK 74133
(918) 940-8500
Same address
Sheldon Berger, D.O.
Gastroenterology
NPI 1114982089
10210 E 91ST ST
Tulsa, OK 74133
(918) 940-8500
✔ PECOS✔ Accepts MedicareSame address
Taylor Ampleford, DNP-A, CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1437570876
4808 S 109TH EAST AVE
Tulsa, OK 74146
(918) 302-2921
✔ Accepts Medicare4.3 mi
Aimy Scroggins, CRNA
Certified Registered Nurse Anesthetist (CRNA)
NPI 1801809942
1923 S UTICA AVE
Tulsa, OK 74104
(918) 744-2345
✔ Accepts Medicare9.2 mi
Niki Gates, RN, MSN, CRNA, APRN
Certified Registered Nurse Anesthetist (CRNA)
NPI 1023327764
1261 S TAMIAMI TRL
Sarasota, FL 34239
(941) 366-2360
✔ Accepts Medicare987 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 Waiver 37D0924800

Gsi ASC, LLC · Tulsa, OK
Active · expires Feb 6, 2027
CLIA Number37D0924800
Laboratory TypeAmbulatory Surgery Center
Certificate Effective DateFebruary 7, 2025
Certificate Expiration DateFebruary 6, 2027
Laboratory DirectorWilliam K. Briggs
Laboratory Phone(918) 940-8500
Laboratory LocationGsi ASC, LLC10210 E 91st St, Tulsa, OK 74133
CLIA data matches this NPI record on: Address Name Phone
This certificate is issued to a laboratory to perform only waived tests.

Areas of Expertise CMS Part B claims 10

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239
This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.
629 services626 patients
Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385
This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.
437 services435 patients
Colorectal cancer screening; colonoscopy on individual at high risk G0105
Colorectal cancer screening, specifically a colonoscopy, is a preventive measure for those at high risk. A thin, flexible tube with a camera inspects the colon to spot any abnormal growths. This test helps detect potential issues early, enhancing the effectiveness of treatment.
343 services340 patients
Biopsy of large bowel using a flexible endoscope 45380
A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.
293 services293 patients
Diagnostic exam of large bowel using a flexible endoscope 45378
This procedure, known as a colonoscopy, involves using a flexible tube with a light and camera to examine the large intestine. It helps detect any abnormalities such as polyps or inflammation. It's a standard procedure to ensure gut health.
218 services217 patients
Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm 43249
This procedure involves using a flexible tube with a camera, called an endoscope, to gently expand narrowed areas in your esophagus, stomach, or upper small bowel. A small balloon is inflated, making it easier for food and liquid to pass through. It's safe and effective.
211 services201 patients

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 Gsi ASC, LLC's NPI number?

The NPI number for Gsi ASC, LLC is 1306214705. It was assigned to this organization in the NPPES registry on September 2, 2015.

Where is Gsi ASC, LLC located?

Gsi ASC, LLC is located at 10210 E 91st St, Tulsa, OK 74133. The listed phone number is (918) 940-8500.

What is Gsi ASC, LLC's specialty?

The primary specialty registered for this NPI is Clinic/Center, specializing in Ambulatory Surgical, with taxonomy code 261QA1903X.

Is Gsi ASC, LLC enrolled in Medicare?

Yes. Gsi ASC, LLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Gsi ASC, LLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 13 clinicians in 2 Medicare specialties reassign their Medicare billing to Gsi ASC, LLC. 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 (8) and Certified Registered Nurse Anesthetist (CRNA) (5). Of these, 10 practice at this address and 12 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Does Gsi ASC, LLC hold a CLIA laboratory certificate?

Yes. A Certificate of Waiver (number 37D0924800) is associated with this NPI, valid through February 6, 2027. CLIA certificates authorize laboratory testing under the federal Clinical Laboratory Improvement Amendments program.

What insurance does Gsi ASC, LLC accept?

Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan, Ambetter from Superior HealthPlan and Ambetter of Oklahoma and 2 other insurers list Gsi ASC, LLC 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 Gsi ASC, LLC was last updated on April 28, 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.