GASTROINTESTINAL ASSOCIATES, LLC
NPI 1912950585
Internal Medicine - Gastroenterology in Columbia, MO

Q: What is Gastrointestinal Associates, LLC's NPI number?

The NPI number for Gastrointestinal Associates, LLC is 1912950585. It was assigned to this organization in the NPPES registry on May 18, 2006. The provider was formerly known as Gastrointestinal Associates, LLP.

Q: What is Gastrointestinal Associates, LLC's specialty?

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

Active since May 18, 2006

210 PORTLAND ST STE 100, COLUMBIA, MO 65201(573) 777-8818(573) 777-8819 Get Directions Write a Review

NPPES record last updated: June 30, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jan 30, 2026, May 22, 2025 (2 updates tracked since 2025).

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About Gastrointestinal Associates, Llc NPPES

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

GASTROINTESTINAL ASSOCIATES, LLC (NPI 1912950585), doing business as Gastrointestinal Associates, Llp, is a healthcare organization registered as a gastroenterology in Columbia, Missouri and active in the NPI registry since May 2006. The organization lists James J Weber, Ceo/authorized Official, as its authorized official.

NPPES Registry Identity

NPI1912950585

Entity TypeOrganization

Primary Taxonomy207RG0100X

Legal Business NameGASTROINTESTINAL ASSOCIATES, LLC

Location Address210 PORTLAND ST STE 100Columbia, MO 65201-6677

Mailing Address210 Portland St Ste 100Columbia, MO 65201-6677 · (573) 777-8818 · Fax (573) 777-8819

Phone(573) 777-8818

Fax(573) 777-8819

Organization SubpartNo

Authorized OfficialJames J WeberCeo/authorized Official · (573) 777-8818

Enumeration DateMay 18, 2006

Last NPPES UpdateJune 30, 20262 updates tracked since enumeration

NPPES CertifiedJune 30, 2026

✔ NPI 1912950585 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.

210 PORTLAND ST STE 100, Columbia, MO 65201

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Other Names 1

Former Legal Business NameGastrointestinal Associates, Llp

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 Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan, Ambetter Health 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)

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

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 37 clinicians reassign Medicare billing to Gastrointestinal Associates, LLC, which bills Medicare for the services they deliver. Of these, 25 practice at this address and 34 within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 4

Certified Registered Nurse Anesthetist (CRNA)24

Gastroenterology7

Nurse Practitioner4

Internal Medicine2

Nearest to this location (20)

See all 37

Bradley Anderson, MD

Gastroenterology

NPI 1649533878

210 PORTLAND ST STE 100
Columbia, MO 65201

(573) 777-8818

✔ PECOS✔ Accepts MedicareSame address

Ameena Anees, MD

Gastroenterology

NPI 1588644488

210 PORTLAND ST STE 100
Columbia, MO 65201

(573) 777-8818

✔ PECOS✔ Accepts MedicareSame address

Robyn Barlow, FNP-C

Nurse Practitioner

NPI 1558131078

210 PORTLAND ST STE 100
Columbia, MO 65201

(573) 777-8818

✔ PECOS✔ Accepts MedicareSame address

Casey Beckley, CRNA

Certified Registered Nurse Anesthetist (CRNA)

NPI 1194309351

210 PORTLAND ST STE 100
Columbia, MO 65201

(573) 777-8818

✔ Accepts MedicareSame address

Rachel Evans, CRNA

Certified Registered Nurse Anesthetist (CRNA)

NPI 1174946610

210 PORTLAND ST STE 100
Columbia, MO 65201

(573) 777-8818

✔ PECOS✔ Accepts MedicareSame address

Donald Gerhardt, MD

Gastroenterology

NPI 1619921673

210 PORTLAND ST STE 100
Columbia, MO 65201

(573) 777-8818

✔ PECOS✔ Accepts MedicareSame address

Kevin Halsey, MD

Internal Medicine

NPI 1942268206

210 PORTLAND ST STE 100
Columbia, MO 65201

(573) 777-8818

✔ PECOS✔ Accepts MedicareSame address

Jeremiah Hays, FNP-C

Nurse Practitioner

NPI 1306499520

210 PORTLAND ST STE 100
Columbia, MO 65201

(573) 777-8818

✔ PECOS✔ Accepts MedicareSame address

Theresa Hogg, CRNA

Certified Registered Nurse Anesthetist (CRNA)

NPI 1952460818

210 PORTLAND ST STE 100
Columbia, MO 65201

(573) 777-8818

✔ Accepts MedicareSame address

Allyson Ihms, CRNA

Certified Registered Nurse Anesthetist (CRNA)

NPI 1033174800

210 PORTLAND ST STE 100
Columbia, MO 65201

(573) 777-8818

✔ Accepts MedicareSame address

Nicolas Llorens, MD

Gastroenterology

NPI 1174575294

210 PORTLAND ST SUITE 100
Columbia, MO 65201

(573) 777-8818

✔ PECOS✔ Accepts MedicareSame address

Rebecca Llorens, MD

Internal Medicine

NPI 1316998503

210 PORTLAND ST STE 100
Columbia, MO 65201

(573) 777-8818

✔ PECOS✔ Accepts MedicareSame address

Kevin Lockett, CRNA

Certified Registered Nurse Anesthetist (CRNA)

NPI 1265483028

210 PORTLAND ST STE 100
Columbia, MO 65201

(573) 777-8818

✔ Accepts MedicareSame address

David Lucas

Certified Registered Nurse Anesthetist (CRNA)

NPI 1457654410

210 PORTLAND ST STE 100
Columbia, MO 65201

(573) 777-8819

✔ Accepts MedicareSame address

Rita Lutz, AGNP-C

Nurse Practitioner

NPI 1982195285

210 PORTLAND ST STE 100
Columbia, MO 65201

(573) 777-8818

✔ PECOS✔ Accepts MedicareSame address

Eric Pfitzinger, CRNA

Certified Registered Nurse Anesthetist (CRNA)

NPI 1497773931

210 PORTLAND ST STE 100
Columbia, MO 65201

(573) 777-8818

Same address

Matthew Struttmann, MD

Gastroenterology

NPI 1386676757

210 PORTLAND ST STE 100
Columbia, MO 65201

(573) 777-8818

✔ PECOS✔ Accepts MedicareSame address

Laura Williams, FNP-C

Nurse Practitioner

NPI 1508453671

210 PORTLAND ST STE 100
Columbia, MO 65201

(573) 777-8818

✔ PECOS✔ Accepts MedicareSame address

Michael Williams, MD

Gastroenterology

NPI 1750334470

210 PORTLAND ST STE 100
Columbia, MO 65201

(573) 777-8818

✔ PECOS✔ Accepts MedicareSame address

Peter Cleavinger, MD

Gastroenterology

NPI 1841244191

210 PORTLAND ST SUITE 100
Columbia, MO 65201

(573) 777-8818

✔ PECOS✔ Accepts MedicareSame address

See all 37 clinicians

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 Gastrointestinal Associates, LLC's NPI number?

The NPI number for Gastrointestinal Associates, LLC is 1912950585. It was assigned to this organization in the NPPES registry on May 18, 2006. The provider was formerly known as Gastrointestinal Associates, LLP.

Where is Gastrointestinal Associates, LLC located?

Gastrointestinal Associates, LLC is located at 210 Portland St Ste 100, Columbia, MO 65201. The listed phone number is (573) 777-8818.

What is Gastrointestinal Associates, LLC's specialty?

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

Is Gastrointestinal Associates, LLC enrolled in Medicare?

Yes. Gastrointestinal Associates, LLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Gastrointestinal Associates, LLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 37 clinicians in 4 Medicare specialties reassign their Medicare billing to Gastrointestinal Associates, 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 Certified Registered Nurse Anesthetist (CRNA) (24), Gastroenterology (7) and Nurse Practitioner (4). Of these, 25 practice at this address and 34 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

What insurance does Gastrointestinal Associates, LLC accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan and Ambetter of Oklahoma and 4 other insurers list Gastrointestinal Associates, 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 Gastrointestinal Associates, LLC was last updated on June 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.