Associated Gastroenterology Medical Group

What Associated Gastroenterology Medical Group does

Associated Gastroenterology Medical Group is a private, independent gastroenterology practice founded in 1976 by Dr. Dennis Riff in Anaheim, California. The practice operates from three locations in Anaheim and Tustin and serves adult patients across Orange, Riverside, and Los Angeles counties. It is staffed by four board-certified gastroenterologists (Drs. Dennis Riff, Brian Riff, Kevin Kuettel, and Kavita Singh) and two physician assistants (Hailey Garrison and Amber Garza), with subspecialty expertise spanning inflammatory bowel disease, hepatology, pancreaticobiliary disease, and advanced endoscopy.

The practice's core offering is a full spectrum of digestive health services built around diagnostic and therapeutic endoscopic procedures — colonoscopy, upper endoscopy (EGD), endoscopic ultrasound (EUS), ERCP, capsule endoscopy, radiofrequency ablation for Barrett's esophagus, Bravo pH monitoring, FibroScan liver elastography, and hemorrhoid banding. Procedural care is delivered primarily through AGMG Endoscopy Center, a wholly-owned, AAAHC-accredited ambulatory facility with Medicare deemed status, supplemented by hospital-based procedures at Anaheim Regional, Foothill Regional, Orange County Global, Placentia-Linda, and St. Jude medical centers. The practice has also maintained a clinical pharmaceutical research program since 1983, contributing to over 1,000 studies including pivotal trials for Humira, Nexium, Prilosec, and Zantac.

AGMG operates a fee-for-service professional services model. Revenue is generated through office consultations, in-office procedures, facility fees from the endoscopy center, hospital-based procedures, and clinical trial site payments. The practice accepts most major PPO, HMO, Medicare, and Medi-Cal plans, accommodates self-referrals for PPO/Medicare patients, and supports online appointment requests. Patient acquisition is largely organic — via referrals, community outreach, and the agmg.com website — with no external institutional ownership, no funding rounds, and no M&A activity on record.

Name

Associated Gastroenterology Medical Group

Legal name

Associated Gastroenterology Medical Group

Website

https://agmg.com

Company type

Private

Founded year

1976

Operating status

Operating

Headcount range

11–50 employees

Short description

Associated Gastroenterology Medical Group is a private, independent gastroenterology practice in Southern California serving adult patients across Orange, Riverside, and Los Angeles counties with four physicians and two physician assistants, delivering diagnostic and therapeutic endoscopic procedures through its AAAHC-accredited endoscopy center.

Ownership category

akta.pro rank

Product category

Gastroenterology Services

NAICS

Offices of Physicians (62111)

SIC

Services-Offices & Clinics Of Doctors Of Medicine (8011)

akta.pro primary industry

Advanced Endoscopy (ERCP/EUS/Interventional) (HLAKAEAC)

akta.pro secondary industries

Endoscopy & GI Procedure Centers (HLAFAIAE), Pancreaticobiliary Disorders (HLAKAEAG)

Keywords

• Gastroenterology services
• Endoscopic procedures
• Colonoscopy screening
• Liver disease management
• Digestive health care

Headquarters

HQ city

Anaheim

HQ country

United States

HQ region

North America

Offices3 records

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Technology or R&D, Marketing or Sales, Supply Chain

Revenue model

1. Patient Services Revenue: Fee-for-service medical practice revenue generated from gastroenterology consultations, endoscopic procedures (colonoscopy, upper endoscopy, EUS, ERCP, capsule endoscopy), and digestive health management services. The practice accepts most insurance plans including Medicare, Medi-Cal, and various PPO and HMO plans. Revenue is generated through office visits, procedures performed at their endoscopy center, and hospital-based procedures.

Go-to-market motion1 record

Distribution channels4 records

Marketing channels4 records

Core offering

Associated Gastroenterology Medical Group is a private gastroenterology practice providing diagnosis and treatment of digestive health conditions for adult patients in Southern California. The practice delivers a full spectrum of GI services including consultations, routine GI care, and advanced endoscopic procedures (EGD, colonoscopy, EUS, ERCP, capsule endoscopy) performed at its AAAHC-accredited in-house endoscopy center. Supporting service lines cover acid reflux/GERD management (including Barrett's ablation and Bravo pH monitoring), liver disease management (with FibroScan diagnostics), hemorrhoid banding, and clinical trial enrollment.

Product overview

Associated Gastroenterology Medical Group is a private gastroenterology practice offering a comprehensive portfolio of digestive health services. The core offering centers on diagnostic and therapeutic endoscopic procedures (EGD, EUS, capsule endoscopy, colonoscopy) performed at their AAAHC-accredited AGMG Endoscopy Center. Supporting services include acid reflux management with Barrett's ablation and Bravo pH monitoring, liver disease management with Fibroscan diagnostics and ERCP, hemorrhoid banding, routine GI care, and clinical trials research. The practice serves Orange, Riverside, and Los Angeles counties from locations in Anaheim and Tustin.

Differentiator

Problem solved

Functional benefit

Brands

• AGMG Endoscopy: A fully-accredited endoscopy center operated by Associated Gastroenterology Medical Group, providing endoscopic procedures including colonoscopy and upper endoscopy. Located within the Anaheim Regional Medical Center campus.

Products and services

• Routine GI Care
• Endoscopic Procedures
• Upper Endoscopy (EGD)
• Endoscopic Ultrasound (EUS)
• Capsule Endoscopy
• Colonoscopy
• Acid Reflux Management
• Barrett's Ablation (RFA)
• Bravo pH Monitoring
• Liver Disease Management
• ERCP
• FibroScan
• Hemorrhoid Banding
• Clinical Trials
• AGMG Endoscopy Center

Named customers2 records

Segments1 record

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Partnerships

One partnership is on record.

• University of California, Irvine (UCI)minorStrategic or Co-development PartnerAGMG has an affiliation with UCI for medical education. Dr. Dennis Riff completed his fellowship at UCI Medical Center. The practice serves as a teaching facility for local students and the website displays the UCI logo indicating an ongoing educational relationship. The practice also mentions Dr. Dennis Riff previously served as a team physician for the LA Rams.

Scale indicators6 records

Recent moves6 records

Expansion highlights4 records

Broad incumbents

• UCI Health: Academic health system affiliated with the University of California, Irvine, with a gastroenterology division and clinical research program. Comparable as both a competitor and academic affiliate — Dennis Riff trained at UCI and the practice maintains a UCI educational relationship.
• MemorialCare: Southern California-based not-for-profit health system with hospitals and outpatient centers in Orange and Los Angeles counties. Comparable as a regional incumbent offering GI services and endoscopy that competes for AGMG's patient base.
• Providence: Large multi-state Catholic health system operating hospitals and medical groups across Southern California. Comparable as a broad incumbent offering gastroenterology services and integrated payor contracting in AGMG's footprint.
• GI Alliance: Largest U.S. PE-backed gastroenterology platform with hundreds of physicians across multiple states. Comparable as the most aggressive independent GI consolidator competing for Orange County physician talent and commercial contracts.
• Hoag Memorial Hospital Presbyterian: Major Orange County health system operating hospitals and outpatient specialty centers including gastroenterology. Comparable as a competing provider of GI services, ASCs, and clinical trials in AGMG's primary service area.

Direct peers

• The Oregon Clinic: Large independent multi-specialty physician group with a significant gastroenterology division. Comparable as a physician-owned specialty practice group offering advanced GI procedures.
• Allied Digestive Health: Large New Jersey-based independent gastroenterology practice group with affiliated endoscopy centers and clinical research programs. Closely comparable in offering comprehensive GI care including EUS, ERCP, capsule endoscopy, and clinical trials.
• United Digestive: PE-backed independent gastroenterology practice management platform operating owned and partnered GI groups with ASCs in the Southeast and expanding nationally. Closely comparable model: independent GI practice plus affiliated endoscopy center, multi-physician group.
• Capital Digestive Care: Large independent gastroenterology group in the Mid-Atlantic with a network of infusion centers and endoscopy suites. Comparable as an independent, physician-led GI group operating advanced endoscopy and ancillary services.
• Carolina Digestive Health Associates: Independent gastroenterology group operating multiple offices and endoscopy centers in the Carolinas. Comparable as a multi-location independent GI group with in-house ASC and broad procedural capabilities.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

Subsidiaries1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Associated Gastroenterology Medical Group